technical specifications lot1-lot5 - aics.gov.it · section x. technical specifications ......

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TECHNICAL SPECIFICATIONS

LOT1-LOT5

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Section X. Technical Specifications

Contents

I. Scope of Supply ……………………………………………………………. 2

II. General Specifications ……………………………………………………. 10

III. General Technical Specifications …………………………………….… 17

IV. Particular technical Specifications ……………………………………... 31

V. Technical Specification Lot1 ..............…………………………………… 90

VI. Technical Specifications Lot2 ………………………..………………… 135

VII. Technical Specifications Lot3 ……………………………….…………149

VIII. Technical Specifications Lot4 …………………………………………167

IX. Technical Specifications Lot5 …………………….…………..…………180

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I) SCOPE OF SUPPLY

ITEM DESCRIPTION Unit Qty

LOT 1

A1 Switch-Disconnecters 36 kV with load breaking head, 3-phase, complete. For top and side

mounting. Pcs

60

A2 SF6 pole mounted Motorise Switch-Disconnecters 36kV with load breaking head, 3-phase,

complete with all protection, control unit (Manuel and auto- operation with interlocked) and

Ability for SCADA application included fibre optic module transceiver (top and side

mounting). With monitor display appear (Volts, Amps, Type of fault,..etc...)

Pcs

10

A3 36kV Autorecloser with relevant set of MV C.T&PT tank type transformers (with CT rating

of 20-40/5A). Ability for SCADA application included fibre optic module transceiver Pcs 12


of 50-100/5A). Ability for SCADA application included fibre optic module transceiver

Pcs 12


of 100-200/5A). Ability for SCADA application included fibre optic module transceiver

Pcs 10

A6 36kV pole mounted Autorecloser with relevant set of MV C.T&PT tank type transformers

(with CT rating of 200-400/5A). Ability for SCADA application

Pcs 5


(with CT rating of 40-50/5A). Ability for SCADA application included fibre optic module

transceiver

Pcs

7


(with CT rating of 100-200/5A). Ability for SCADA application

Pcs 10


(with CT rating of 300-600/5A). Ability for SCADA application included fibre optic

module transceiver

Pcs

3

A10 Metering Unit pole mounted MV measuring 33kV (KW/h,KVAR,..etc..) Class 0.2; With

CT and VT, Ability for SCADA application included fibre optic module transceiver, with

protection fuse

Pcs

80

A11 Metering Unit pole mounted MV measuring 22kV (KW/h,KVAR,..etc.) Class 0.2; With CT

and VT, Ability for SCADA application, with protection fuse

Pcs 30

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A12 3 Phase 36kV electronic sectionalizer, Nominal current: Actuating current Resettable 6 -

215 A, Types of inrush currents detected Symmetric and asymmetric, Inrush detection time

< 1 cycle. Ability for SCADA application included fibre optic module transceiver

Pcs

30

A13 33kV Fault Indicator (visual) Pcs 100

A14 22kV Fault Indicator (visual) Pcs 30

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LOT2

B1 36kV, under-ground cable, single core 1x400mm2 AL (XLPE/PVC) Km 140

B2 36kV, under-ground cable, single core 1x150mm2 AL (XLPE/PVC) Km 6

B3 Outdoor termination for 36 KV, under-ground cable, 1 core 1x150mm2 Al (XLPE/PVC)

(Set of 3 phases), Including Compression terminal lug for 150mm2 Al

Set 12

B4 Outdoor termination for 36 KV, under-ground cable, 1 core 1x400mm2 Al (XLPE/PVC)

(Set of 3 phases), Including Compression terminal lug for 400mm2 Al

Set 100

B5 Straight joint for 36 KV, under-ground cable, single core 1x150 mm2 Al (XLPE/PVC)(Set

of 3 phases), Including filler for 150mm2 Al

Set 12

B6 Straight joint for 36 KV, under-ground cable, single core 1x400 mm2 Al (XLPE/PVC)(Set

of 3 phases), Including filler for 400mm2 Al

Set 150

B7 Compression terminal lug for 150mm2AL/Cu with 17 mm hole Pcs 180

B8 Compression terminal lug for 400mm2AL/Cu with 17 mm hole Pcs 200

B9 Cable holder for fastening on steel towers for 36kV, underground cable, single core

1x150mm2 AL (XLPE/PVC))(Set of 3 phases)

Pcs 45

B10 Cable holder for fastening on steel towers for 36kV, underground cable, single core

1x400mm2 AL (XLPE/PVC)(Set of 3 phases)

Pcs 180

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LOT 3

C1 ACSR conductor 185mm2/25mm2(DIN 48.204) Km 200

C2 ACSR conductor150mm2/15mm2(DIN 48.204) Km 30

C3 ACSR conductor50mm2/15mm2(DIN 48.204) Km 30

C4 ADSS Optical Cable CentraCore included all accosseries, junction boxes and fetings Km 60

C5 Stranded Copper Conductor 35mm2 (Solid). Km 7

C6 Al straps for dead end clamps Km 2

C7 Polymeric tension insulator 36 kV-1170 creepage distance ACSR,complete with Fittings

for Dead end tension set, suitable for fixing (120- 185) mm2 ACSR to steel poles. There

shall be an adjustable part in the set, for adjustment when stringing

Pcs 1800

C8 36 kV Pin insulator 170 mm pin with 2 nuts, 100 mm threads Pcs 2100

C9 Lightning Arresters 36kV Pcs 200

C10 Lightning Arresters 24kV Pcs 120

C11 Parallel groove clamp for ACSR 120- 185 mm2 Pcs 1600

C12 Parallel groove clamp for ACSR 50- 125 mm2 Pcs 180

C13 Automatic Al tension joints for ACSR 50 mm2 Pcs 50




C17 Non Tension Clamp AL (50-240mm2) / AL (50-240mm2) PCS 4000

C18 Fittings for Dead end tension set for ACSR 50/8 and steel poles. PCS 700

C19 Preformed distribution ties for ACSR 185/35 Top Tie PCS 400

C20 Preformed distribution ties for ACSR 185/35 Side Tie PCS 250

C21 Preformed distribution ties for ACSR 185/35 Angel Tie PCS 500

C22 Preformed distribution ties for ACSR 95/15 Top Tie PCS 300

C23 Preformed distribution ties for ACSR 95/15 Side Tie PCS 250

C24 Preformed distribution ties for ACSR 95/15Angel Tie PCS 250

C25 Compression terminal lug for ACSR Rabbit, Al/Cu with 13mm hole.(Cable-shoe) PCS 450

C26 Cu parallel groove connecting clamp (Reinforcement joint) for stranded copper conductor,

Cu 120 mm2 PCS 100

C27 Hang Pin 16mm PCS 1800

C28 Fork ball hook 16mm PCS 1800

C29 Earth Rod 15 cm diameter 1.5 Long Included all accessories connection clamp, joint and

cable shose70mm2 Pcs 600

C30 PVC Insulated Standard Compacted Circular Copper Conductor 1*70 mm2 Yellow/Green Km 3

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LOT 4

E1 400 kVA, 33-22/0.4 kV Dual ratio outdoor Pole Mounted Distribution Transformer 3 phase,

with off load Tap changer

PCS 15

E2 160 kVA, 33- 22/0.4 kV Dual ratio outdoor Pole Mounted Distribution Transformer 3

phase, with off load Tapchanger

PCS 3

E3 33 kV Capacitor Bank 300 KVAR Set 7

E4 22 kV Capacitor Bank 300 kVAR Set 6

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LOT 5

J1 Lattice Steel Pole (L.S.P.) (120/130) 12 m complete with the required bolts, washers and

nuts

Pcs

25

J2 Steel Base for (L.S.P.) (120/130); (5.25 m + area conection) long complete with the

required bolts, washers and nuts as drawing

Pcs 25

J3 Lattice Steel Pole (L.S.P.) (90/110) 12 m (K2141) complete with the required bolts,

washers and nuts for fixing with bases.

Pcs 100

J4 Steel Base for (L.S.P.) (90/110) 5 m + area connection) long as drawing Pcs 100

J5 Lattice Steel Pole (L.S.P.) (80/90) 12 m complete with the required bolts, washers and

nuts for fixing with bases.

Pcs 250

J6 Steel Base for (L.S.P.) (80/90) (5 m+ area connection) long (K2134) as drawing Pcs 150

J7 Steel Base for (L.S.P.) (80/90) 2.25 m long Pcs 100

J8 Channel Steel Pole U 14 (12 m) long (K257) complete with the required bolts, washers

and nuts for fixing with bases

Pcs 30

J9 Steel Base for (C.S.P.) U 14 (4 m) long Pcs 15

J10 Steel Base for (C.S.P.) U 14 (2.5 m) long Pcs 15

J11 Tension & Suspension (L.S.P.) Central Arm (K2231) complete with the required bolts,

washers and nuts, Included all accessories for complete installation

Pcs 230



Pcs 449



Pcs 355



Pcs 355

J15 Tension & Suspension (L.S.P.) Side Arm (K63) complete with the required bolts,


Pcs 60

J16 Tension & Suspension (L.S.P.) Side Arm (K12801) complete with the required bolts,


Pcs 40

J17 Tension & Suspension(L.S.P.)Side Arm (K12801) complete with the required bolts,

washers and nuts (Below Top 75cm), Included all accessories for complete installation

Pcs 40

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J18 Tension & Suspension(L.S.P.)Side Arm (K12801) complete with the required bolts,

washers and nuts(Below Top 120cm), Included all accessories for complete installation

Pcs 30

J19 Arm for switch or cables (K1743+ K11102) complete with the required bolts, washers

and nuts, Included all accessories for complete installation

Set 60

J20 Arm for cables (K1555) complete with the required bolts, washers and nuts, Included all

accessories for complete installation

Pcs 30

J21 Suspension (U-Shape) Central Arm (K41) complete with the required bolts, washers and

nuts, Included all accessories for complete installation

Pcs 15

J22 Suspension (U-Shape) Central Arm (K42) complete with the required bolts, washers and

nuts, Included all accessories for complete installation

Pcs 15

J23 Anti-Climbing Steel Bars for L.S.P. (K113/8) complete with the required bolts, washers

and nuts

Set 505

J24 Anti-Climbing Steel Bars for C.S.P. (K78/2) complete with the required bolts, washers

and nuts

Set 30

J25 Auxiliary Arm for 1 phase (K160/1) complete with the required bolts, washers and nuts Set 30

J26 Auxiliary Arm for 2 phase (K160/2) complete with the required bolts, washers and nuts Set 15

J27 Auxiliary Arm (K166) complete with the required bolts, washers and nuts Set 12



J30 Lattice Arm for transformer (K183) complete with the required bolts, washers and nuts Set 70

J31 Arm for fixing transformer to K183 (K188) complete with the required bolts, washers

and nuts

Set 30

J32 Arm for top mounted switch (K1561) complete with the required bolts, washers and nuts Set 60

J33 Protection Arm for C.S.P. - earth protection (K81) complete with the required bolts,

washers and nuts

Pcs 30

J34 Special arm for holding capacitor complete with the required bolts, washers and nuts Set 13

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II. GENERAL SPECIFICATIONS

COMPLETNESS OF CONTRACT

All apparatus, accessories or fittings which may not have been specifically mentioned,

but which are usual or necessary in the respective equipment for the completeness of

the finished work in an operable status, shall be deemed to be included in the Contract

and shall be provided by the Supplier without any extra charge. All equipment shall be

complete in all details, whether or not such details are mentioned in the Specifications.

This includes fixation details and connection clamps and/or terminals.

Any reference in the quantity and price schedules, the delivery period schedule or in the

various clauses and schedules of the text of either the Specification or the Bid, to any

equipment shall imply that the equipment is complete with all accessories, apparatus

and fittings as outlined in sub-clause 1.1.1 above.

The Bidder shall be responsible for ensuring that the equipment supplied is fit for the

purpose intended. Available information on the characteristics of the system to which

the works will be connected and associated will be supplied on request to the Bidder

who shall be responsible for obtaining and determining all applicable knowledge

relevant to the works.

DRAWINGS AND DOCUMENTATION

The Supplier shall prepare and submit to the Purchaser for approval dimensioned

general and detailed design drawings and other pertinent information of all the

Equipment specified in the Specifications.

In the event of any difference between the drawings and the Specifications, the latter

shall prevail.

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All text on drawings provided by the Supplier shall be in the English language.

All drawings shall be dimensioned in millimeters.

QUALITY OF MATERIALS

All materials supplied under this Contract shall be new and of the best quality and of

the class most suitable for working under the conditions specified and shall withstand

the variations of temperature and atmospheric conditions arising under working

conditions without distortion or deterioration in the setting up of undue stresses in any

parts and also without affecting the suitability of the various parts of the Works for

which they were designed. No toxic material (such as Halon, PCB, and Asbestos) shall

be utilized.

SUPPLIER'S QUALITY ASSURANCE PROCEDURES

The Bidder shall have established a quality assurance system based on ISO 9001 or

9002. The Supplier shall include a documentation of the system with a list of current

procedures, an organigram of the quality organization and the name of the quality

manager. He shall also submit a list of quality revisions performed the last twelve

months with a list of closed and unclosed findings as well planned revisions the coming

twelve months.

The Supplier shall submit for approval a program of quality control and inspection

procedures to assure that the product during manufacture and on completion complies

with the specified requirements. The program shall relate the quality control and

inspection activities to the production cycle. In support of the quality control and

inspection program the Supplier shall provide details of quality control and inspection

procedures available for use in the execution of the Contract. The Supplier shall retain

responsibility for quality control and inspection activities made by his sub-Suppliers and

shall indicate on the program, which items are to be sub-contracted.

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PLACES OF MANUFACTURE AND SUB-SUPPLIERS

The manufacturer's identity and places of manufacture, testing and inspection before

shipment for the various portions of the Contract shall be specified in the Technical

Schedules and shall not be departed from without the agreement of the Purchaser.

All Suppliers and Sub-suppliers of components and materials shall be subject to the

approval of the Purchaser. Information shall be given on each Sub-order sufficient to

identify the material or equipment, to which the sub-order relates, stating that the

material is subject to inspection by the Purchaser before dispatch.

All equipment offered shall be the product of recognized and experienced manufacturers

and shall be proven equipment of the same basic design and size similar to that which

has been in successful continuous operation for at least three years preferably under

similar climatic conditions. Proven plant reliability and high availability are of prime

importance and the attention of the Bidder is drawn to these particular requirements.

INSPECTION AND TESTING

All materials in the Contract might inspected by the Purchaser and it is the Supplier's

responsibility to advise the Purchaser when equipment and materials are available for

inspection, at least 1 month in advance.

Factory tests on equipment shall be made according to the applicable IEC Standards, or

as specifically specified or according to standards approved by the Purchaser.

Routine tests shall be made on each unit of all equipment.

Proposed equipment shall be type tested. Type test report shall be submitted at bidding stage.

. Instead of carrying out the type tests the Supplier shall submit all certificates needed

of tests made on equipment of the same type; however, the Purchaser reserves the right

of accepting these certificates or to reject them partially or totally.

The Purchaser shall be should be entitled to any additional testing at the manufacturer's

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place, at site or elsewhere in order to verify that the equipment complies with the

conditions of the Specifications.

A test program shall be submitted to the Purchaser for approval at least 1 month ahead

of the commencement of testing.

Measuring apparatus shall be approved by the Purchaser and if required shall be

calibrated at the expense of the Supplier at an approved laboratory.

PACKING, TRANSPORTATION AND STORAGE

Packing shall give adequate protection to the enclosed materials against mechanical

damage during transport to its final destination, including rough handling during sea,

rail and road transport and transition from one mode of transport to another.

Packing should be stout close-boarded wooden cases of adequate thickness, suitably

braced and banded and lined internally with water-resistant material or equally solid

enclosures.

Steelworks sections and similar items may be bundled provided that the ends are

adequately protected and the enclosing bands or wires are robust.

Indoor electrical equipment must be enclosed in welded polythene envelopes inside

packing cases and the envelopes shall be evacuated or have a desiccant inside.

All items in cases or crates shall be secured so that they are not free to move and cannot

work loose in transport. If rotating parts are shipped within their bearings or mountings,

they must be adequately braced and restrained to prevent relative movement. Loose

items shall be placed in bags in a case, each bag having stitched onto it a label indicating

the number and nature of its contents. Where a filler material is used in a case to restrict

movement or provide additional protection, it must be inorganic and non-hygroscopic.

All surfaces liable to corrosion shall be thoroughly cleaned and special steps adapted to

the nature of the materials and the time interval between packing and unpacking shall

be taken to prevent corrosion. These steps may constitute the greasing on surfaces, the

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application of a protective coat, enclosure of the items in a hermetically sealed container,

the addition of vapour phase inhibitor paper to the package or other approved means.

Steps shall be taken to ensure that moisture, mould, insects or rodents cannot damage

insulated materials. Items that include materials liable to be damaged by moisture shall

be packed in hermetically sealed containers in which silica gel, or some other approved

desiccant has been inserted.

Cases shall be marked with large lettering to show which side of the case is to be up,

and if the contents are fragile, marked "FRAGILE" in large letters with the international

wineglass symbol. Packages shall be marked with their place of destination in such a

way that rough handling or the effect of weather cannot remove or obliterate the

marking. Each item shall be marked with its gross weight and, for all lifts over two

tones, marks on the cases shall show the correct positions for the slings.

Special steps shall be taken to guard against theft during transport. No small items such

as padlocks nameplates and so forth that could be torn off or unscrewed shall be

accessible.

Cases, crates, barrels and drums shall be banded in such a manner as to obstruct the theft

of any of the timber used for packaging and the bands shall be so secured that they are

not rendered ineffective by shrinkage of the wood.

A descriptive and fully itemized list shall be prepared of the contents of each packing

case. A copy of this list shall be placed in a waterproof envelope under a metal or other

suitable plate securely fastened to the outside of one end of the case, and its position

indicated by stenciling on the case. Where appropriate, drawings showing the erection

markings of the items concerned shall be placed inside the case.

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All stenciled markings on cases and crates, or other markings on descriptive metal tabs

fixed ton cable drums, bundles of structural steel works and so forth, shall be applied in

two places with a material which cannot wash off and shall be additional to any erection

or other marks or impressions which may be specified elsewhere.

Shipping marks are to be stenciled in oil based paint in block letters and symbols. When

unobstructed flat smooth surfaces of sufficient size are not available on the case for the

shipping marks they are to be stenciled on marine-ply notice boards of adequate size

and of at least 6 mm thickness securely fastened to the packing case. All packing cases,

though not steel containers, shall remain the property of the Purchaser.

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III) GENERAL TECHNICAL SPECIFICATION

GENERAL

This Chapter covers the general technical specifications of the electrical equipment to

be procured under the contract.

DRAWINGS

The Bidder shall in his Bid enclose overall drawings showing dimensions, internal

components and fixing methods to a detail level allowing the Purchaser to evaluate the

functionality and completeness of the equipment

STANDARDS

Ratings, characteristics, tests and test procedures, etc. for the electrical equipment

encompassed by this specification shall comply with the relevant provisions and

requirements of the Recommendations of the International Electro-technical

Commission (IEC), unless otherwise expressly stated in Particular Technical

Specifications. This applies even where the specific standards are not referred to in the

Particular Specifications. Where the IEC Recommendations do not fully cover all

provisions and requirements for the design, construction, testing, etc. and for equipment

and components that are not covered by IEC Recommendations recognized national

standards shall be applied. The rules of CEE (International Commission for the approval

of electrical equipment) and the standards of CENELEC (Committee European de

Normalization Elecrotechnique) may also be applied.

The latest revision or edition in effect at the time of Bid Invitation shall apply. Where

references are given to numbers in the old numbering system from IEC it shall be taken

as to be the equivalent number in the new five digit number series.

The Precise Standard, complete with identification number, to which the various

equipment and materials are manufactured shall be specifically stated by the Bidder.

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In case of conflict or disagreement between the particulars of the Standard adopted by

the Bidder and the particulars of this Specification, this Specification shall prevail over

the Standard. All conflicts or disagreements, mentioned above, must be clearly stated,

failing which the materials and equipment offered shall be deemed to comply in every

respect with this Specification both in manufacture and in performance, and compliance

thereof be insisted upon without additional cost to the Purchaser.

UNITS

The Si-system (meter, Newton, second) shall be used throughout the contract covered

by this Specification.

DEFINITIONS

Whenever the following terms or words are found in the specifications and/or other

documents, they shall have the following meaning:

"High Voltage Equipment" (HV)

Mostly used for equipment provided for a maximum operating voltage higher than 36

kV (generically also used for voltages down to 1000 V).

"Medium Voltage Equipment" (MV):

Equipment provided for a maximum operating voltage higher than 1000 V and up to 36

kV.

"Low Voltage Equipment" (LV):

Equipment provided for operation at 1000 V or below. (For transformers the term Low

Voltage Winding is used for the side with lowest rated voltage regardless of value, ref.

IEC 60076). Reference to degree of protection (IP) is according to the classification in

IEC 60529.

PHASE RELATIONSHIP

The standard phase colors are Red (LI), Yellow (L2), and Blue (L3) (RYB).

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ELECTRICAL DESIGN CRITERIA

All equipment except as explicitly defined in the technical data sheets shall be designed

to withstand the design stresses given below without damage and disruption of service.

All tests shall as a minimum is based on these design parameters.

Item Description Unit 33 22 6.6 0.4

1 Nominal system voltage phase to phase kV 33 22

6.6

0.4

2 Highest system voltage phase - phase 1) kV 36 24 7.2 0.42

3 System Frequency Hz 50 50 50 50

4 System earth(see above) — Solid Solid Solid Solid*

Minimum Design Short circuit Current (1

sec. arch test)2) kA 25 25

5 Impulse withstand voltage (1.2/50 µsee

wave)3) kV peak 170 125

6 Power frequency withstand voltage (1

min.)3) kV 70 50

7

1 Min creepage distance over outdoor

insulators (Pollution class 3-severe, IEC

60815/85-1 2.5cm/kV)

cm 90 60

*: loaded and effectively earthed neutral TN-S system, and TN-C system.

Note 1)

Ref. IEC 60038.

Note 2)

For all current carrying parts the permissible short circuit duration shall be at least

1 second. Indoor equipment shall be arch tested in accordance with IEC 60298

amendment 2. The dynamic or momentary short circuit current on which the equipment

design shall be based shall be computed by multiplying the rms value of the symmetrical

short circuit current by the factor 1.8 xU2.

Note 3)

Ref. IEC 60071

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AMBIENT TEMPERATURES, RELATIVE HUMIDITY, WIND PRESSURE

Unless otherwise specifically stated in Particular Technical Specification, any

equipment, component and assembly shall be designed for the following service

conditions:

Description Unit Value

1 Altitude of site above sea level m 0 to +1000

2 Ambient Temps: - Maximum

- Minimum

°C

°C

45

-5

3 Wind Speed m/s 15

4 Isokeraunic Level 15

5 Pollution Type Dust

6 Relative Humidity

Maximum

Minimum

%

%

100

10

7 Rainfall Average annual mm 600

8 Hail Yes

9 Fog Yes

10 Sand Storms Occasional

Wherever any of these maximum or 24 hour average temperatures exceed the normal

service condition temperatures of the IEC Recommendations for the relevant equipment,

or of such other standard which is approved to be applied, the permissible temperature

rises of the recommendations or the standard shall be reduced by the same amount as

the difference between the above figures and the normal service condition temperatures.

The Supplier shall guarantee these reduced temperature rises.

MATERIALS

1. STANDARDIZATION OF EQUIPMENT

The Supplier shall be responsible for the standardization of all small mechanical and

electrical equipment, materials and devices.

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Where electrical sockets are specified Palestine/Israelite standard sockets shall be used.

Single phase sockets shall be 16A with earth plug if nothing else is specified.

Where nothing else is specified, LV power fuses above 63A shall be of high rupturing

capacity cartridge, type NH gl, according to DIN VDE 0636 and IEC 60295. All fuse

bases shall have a load switching capacity and a thermal rating equal to the rating of the

largest fuse it can accommodate.

Miniature circuit breakers shall replace fuses in control and power circuits 63 amps and

below.

2. LOCKING DEVICES AND PADLOCKS

Facilities for applying safety or security padlocks to circuit breaker operating

mechanisms, isolator and switch operating handles, control switches, control cubicles,

outdoor cabinets etc. shall be provided. The facilities shall be suitable for padlocks

having a hasp diameter of 10 mm. Padlocks are not required.

3. ELECTRICAL EQUIPMENT MATERIALS

All material delivered shall be of the best quality and of the class most suitable for

working under the conditions specified and shall withstand the variations of temperature

and atmospheric conditions arising under specified conditions without distortion or

deterioration or the setting up of undue stresses in any. No welding, filling or plugging

of defective parts will be permitted without the sanction in writing of the Purchaser.

Materials that are susceptible to mould growth under tropical conditions shall be treated

to exclude moisture and prevent growth of mould after all machining has been carried

out.

All apparatus, connections and cabling shall be designed and arranged to minimize the

risk of fire and any damage that might be caused in the event of fire. All plastic material

used in boxes, panels and boards shall be self-extinguishable.

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Copper and aluminum used as electrical conductors shall be of the electrolytic type and

comply with the respective ASTM or DIN Standards.

Cast iron shall not be used for chambers of oil-filled apparatus or for any part of the

equipment that is in tension or subject to impact stresses except where it can be shown

that service experience has been satisfactory with the grade of cast iron and the duty

proposed.

SURFACE TREATMENT AND PAINTING, ELECTRICAL EQUIPMENT

4. CLEANING AND PAINTING

Before painting or filling with oil or compound all un-galvanized parts shall be

thoroughly cleaned, free from rust, scale, burrs, grease and moisture and all external

rough surfaces on castings shall be filled.

Successive coats of paint shall be applied to a clean, dry and properly prepared surface.

Each coat shall be compatible with the preceding coat and the coat to follow.

The color and shade of all painted external surfaces shall be to the approval of the

Purchaser.

The following minimum painting requirement shall apply to all ferrous parts unless

the Supplier can show, to the satisfaction of the Purchaser, which any alternative he

proposes is in all respects equal or superior to the specified requirements:

Apparatus Painting

INTERNAL SURFACES

Oil filled chambers and tanks One coat of oil resisting varnish or paint

Kiosks and apparatus boxes for use

outdoors

Three coats of paint, the final coat being

an anti-corrosion finish colored white or

light grey

Cubicles, kiosks and apparatus boxes for Three coats of paint, the final coat being

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use indoors a white or light color.

Apparatus Painting

EXTERNAL SURFACES

All un-galvanized surfaces other than

nuts, bolts and washers may be removed

for maintenance purposes, for use

outdoors

At Works

(a) One priming coat of corrosion

inhibiting paint applied immediately after

cleaning

(b) Two coats of non-glossy oil and

weather resisting paint applied after

inspection and testing and before

dispatch.

At Site

One finishing coat of glossy, oil and

weather resisting, non-fading paint

applied after erection is complete. For

equipment dispatched completely

assembled, the final coat may be applied

at the works unless otherwise required by

the Purchaser.

Exposed, un-galvanized nuts, bolts and

washers which may be removed for

maintenance purposes for use outdoors

One coat of oil and weather resisting,

non-fading paint applied after erection

Panels, Cubicles, Kiosks and apparatus

boxes for use indoors

Three coats of paint, the color and finish

of the final coat to be to the approval of

the Purchaser.

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GALVANIZING

Galvanizing shall be applied by the hot dipped process. The preparation for

galvanizing and the galvanizing process shall not affect the mechanical properties of

the material being coated.

Drilling, punching, cutting, bending, removal of burrs and all machining shall be

completed before galvanizing.

The zinc coating shall be smooth, clean and of uniform thickness and free from defects.

The preparation for galvanizing and the galvanizing itself shall not adversely affect the

mechanical properties of the coated material. All galvanized steel that has been cut,

drilled or worked on site shall be painted with an approved zinc rich paint.

The average thickness of the zinc coating shall be equivalent to not less than 0.6 kg/m2

of zinc for all surfaces, except steel wires, bolts and nuts. Galvanizing will be tested in

accordance with the appropriate standards in order to determine that it complies with

this requirement. The thickness of the zinc coating for steel wires shall be in

accordance with a national standard and shall be approved by the Purchaser. All

galvanized wires on which tools have been used or cut shall be treated with approved

bit mastic paint.

All bolts and screwed rods for the connection of galvanized steel parts shall be

galvanized including the threaded portion(s) to a minimum average coating weight of

305 g/m2. The threads of all bolts and screwed rods shall be cleared of spelter by

spinning or brushing. A die shall not be used for cleaning the threads unless specially

approved by the Purchaser. All nuts shall be galvanized with the exception of the

threads that shall be oiled.

P a g e | 24

White rust formation subsequent to galvanizing must be inhibited using an approved

inhibitor applied according to the manufacturer's instructions. Material on which

galvanizing has been damaged shall be re-dipped unless, in the opinion of the

Purchaser the damage is local and can be repaired by applying a coat of galvanizing

repair paint where such repair is authorized, the damaged area shall be cleaned by

wiping with clean rags saturated with mineral spirits "or xylene followed by wire

brushing. After wire brushing, the area shall be re-cleaned with solvent to remove

residue and shall be given a minimum of two coats of zinc rich paint in accordance

with the manufacturer's instructions. Such painting shall be applied as soon as possible

and in no case more than 4 hour after the surface preparation.

INSULATING OIL AND GAS

All electrical equipment requiring insulating oil or other insulating or gas shall be

furnished with the first filling including flushing, if required. An excess of 10% of the

net amount of oil or liquid required for each component shall also be furnished by the

Supplier as spare.

The insulating oil shall not contain matters that are not biodegradable such as PCB, etc.

The Supplier shall endeavor to employ, as far as practicable, one type and make of

insulating oil only for all the electrical equipment.

SF6 gas shall comply with the requirements of IEC 60376. The high pressure cylinders

for shipment and storage of the SF6 gas shall comply with the applicable national

regulations.

All the necessary pipes, couplings, flexible tubes and valves for coupling to the

switchgear for filling or evacuating all the gases or oil to be used, with all necessary

instructions for the storage of this equipment, shall be provided.

P a g e | 25

ALUMINUM AND ALUMINUM ALLOYS

Aluminum shall be of high commercial quality. The composition, including the

percentage and nature of any impurities, shall be stated in the Schedules. All aluminum

alloys shall be of approved compositions as stated in the Schedules. Aluminum and alloy

castings shall be sound and free from air pockets and pinholes.

BOLTS, STUDS, NUTS, SCREWS, WASHERS, ETC

All bolts, studs, nuts, etc. shall have a standard metric threading and conform to the

relevant standards as regards shape and tolerance. They shall be marked with the

manufacturer's symbol and class of strength.

Bolts and nuts for electrical connections shall preferably be of brass M6 size.

Alternatively size M5 may be used, but these must be of stainless steel, phosphor bronze

or high tensile brass.

All bolts, studs, nuts, washers, screws, etc., above 10mm diameter, if not in stainless

steel or other corrosion-resistant material, shall be hot-dip galvanized, except for bolts

above Strength Class 8.8. In this case, corrosion-resistant material will be required.

Bolts, etc., smaller that 10mm diameter shall be electrolytic zinc-coated if not provided

in stainless steel or other corrosion-resistant material.

Bolts, nuts, studs and screws that require frequent tightening and unbolting during

inspection or maintenance procedures shall be of stainless steel.

All bolts and nuts shall be hexagonal, either normally or of the round head socket type

and secured in an approved manner against becoming loose during operation.

Bolts shall not protrude more than four treads or 10 mm beyond the nut (except for

terminals) but not less than two full threads.

NAMEPLATES AND SIGNS

All equipment shall be clearly and permanently labeled in English, to the approval of

P a g e | 26

the Purchaser. Where labels are provided for making clear the method of operation of

equipment they shall be concise and preferably diagrammatic in form.

All outdoor nameplates and signs shall be made of non-corrosive weatherproof material

as trafolyte, aluminum or stainless steel.

Danger labels shall have red lettering on a white background. All other labels shall have

black lettering on a white background.

Before production of labels and notices the Supplier shall submit to the Purchaser full

scale drawing of the proposed labels

DESIGN AND CONSTRUCTION

5. GENERAL REQUIREMENTS

The Contract Supplies shall be designed to facilitate inspection, cleaning and repairs

and for operation, in which continuity of service is the first consideration. All apparatus

shall be designed to ensure reliable and safe operation under the atmospheric conditions

prevailing at the Site and under such sudden variations of load and voltage as may be

met with under working conditions of the system, and short circuits, including those due

to faulty synchronizing, within the rating of the apparatus. The general operating

conditions are given in this specification.

In no part of the equipment, including busbars, connection, isolators, fuses, contacts and

cable boxes shall the temperature rise exceed the values specified in the relevant IEC or

equivalent Standards.

Corresponding parts liable to renewal shall be interchangeable. When required by the

Purchaser, the Supplier shall demonstrate this quality. All apparatus shall operate

without undue vibration and with the least practicable amount of noise.

Means shall be provided for the easy lubrication of all bearings and where necessary, of

P a g e | 27

any mechanism or moving part. Grease lubricators shall be fitted with hexagon nipples.

All mechanisms shall, when necessary, be constructed of stainless steel, brass or

gunmetal to prevent sticking due to rust or corrosion.

All taper pins used in any mechanism shall be of the split type. All connections and

contacts shall be of ample section and surface for carrying continuously the specified

full load currents without undue heating and shall be secured by bolts or set screws of

ample size fitted with locking devices of approved type and material.

All rubbing or wearing surfaces shall be machine surfaced. Joints employing a gasket

material shall be so constructed that the packing is maintained under sufficient

compression in all parts so that an efficient joint can be made without the use of jointing

compounds. Gasket material shall be of the minimum thickness necessary and have

approved composition.

All apparatus shall be designed to exclude vermin and insects from entering the

equipment

All outdoor apparatus including bushing insulators and fittings shall be designed so that

water cannot collect at any point.

6. ERECTION MARKS

All Plant equipment that requires assembly at Site shall have distinguishing marks on it

to facilitate erection and to identify the material in relation to drawings, material lists or

shipping documents. All marks shall be legible and easily visible. Where relevant,

erection marks shall be stamped before galvanizing and shall be clearly visible after

galvanizing.

P a g e | 28

7. SWITCHBOARDS AND PANELS

Switchboards as well as distribution, control, relay and metering boards and panels shall

be of robust free-standing construction, formed of a steel frame and covered with smooth

steel plate. The steel plate shall be properly stiffened to prevent distortion.

All cabinet shall be touch proof (IP2X) when the doors are opened. Safe replacement of

fuses shall be possible without risk for arching or use of special tools, the replacement

shall preferable be possible with an integrated load breaker/fuse holder making fuse

replacement possible only in de energized state or by insulated fuse cowers with load

breaking capacity.

Outdoor cabinets shall be dust and water proof (IP54) and provided with thermostat

controlled heaters to inhibit collection of moisture. The heater must be arranged not to

overheat any cables or equipment. Openings for drainage of condense shall be provided

at the lowest point in the cabinets.

The frames of the boards shall be designed to permit firm anchoring on the floor and

easy erection.

All contactors or relay coils and other parts shall be suitably protected against corrosion.

The Supplier's supply shall include all necessary mounting brackets, framing,

foundation bolts and respective embedded metal, if required, to permit proper

installation of the boards.

All terminals and all equipment shall be accessible without dismantling other

components.

P a g e | 29

8. WIRING AND TERMINAL BLOCKS

All wiring shall be stranded conductor; PVC insulated suitable for operation at voltages

below 1000 V in compliance with the provisions of the applicable IEC

Recommendations. Conductors shall not be smaller than 2.5 mm2 for current

transformer circuits and 1.5 mm2 for all other control circuits. The selection of

conductor sizes for current transformer circuits shall be supported by calculations.

For wiring within boards the "bunch" pattern shall be adopted. For a small number of

connections, wiring may be grouped using flexible plastic bands or equivalent. For a

large number of connections a system using support strips or U-shaped troughs (with

covers) shall be used. The latter principle arrangement shall apply for cable distribution

racks.

It shall be possible to work on small wiring for extension, maintenance or test purposes

without making a switchboard dead.

All cables control wiring and terminals shall be marked in a systematic manner, both on

the drawings and on the cables, wires and terminals themselves. The markings shall be

in accordance with a system presented and co-ordinate by the Supplier and the

Purchaser. The cable marking shall be fire proof.

All wiring shall terminate at terminal blocks. The latter shall be of the molded type and

provided with barriers to separate power from control cables. It shall be possible to

replace a single terminal block without dismantling a whole row. Where appropriate,

terminal blocks shall be equipped with facilities for testing, such as short-circuiting,

separating, plugging in, etc. Terminal blocks shall be located at least 300mm from the

bottom of the panel and shall be easily accessible. They shall be clearly marked the

designations being those entered in the respective wiring diagrams.

P a g e | 30

Terminal blocks using screws acting directly on the wire (conductor) as well as spring

type terminal blocks are not acceptable. To avoid squeezing of the wire the screw

pressure shall be applied by a pressure plate having smooth edges.

Only one conductor shall be connected to each side of a terminal block and the branch-

offs shall be made by interconnecting the necessary number of neighboring blocks by

means of copper strips, unless otherwise approved by the Purchaser.

P a g e | 31

IV) PARTICULAR TECHNICAL SPECIFICATIONS

This Section covers the particular technical requirements of the medium (24 and 36kV)

and low (400V) voltage equipment to be procured under this contract. By conflict

between the general specification and the particular specifications below the particular

specifications prevail.

Medium Voltage Cable

The conductor shall be covered with:

Conductors as specified in .1.3. To be with swelling powder to prevent axial ingress of

water along the conductor

An extruded semi-conducting layer

A layer of dry vulcanized cross-linked polyethylene (XLPE) insulation

An extruded vulcanized semi-conducting layer

A layer of swelling tape to prevent axial ingress of water along the screen

A layer of earthing screen of stranded copper, connection between copper and

aluminum

A layer of longitudinal aluminum to prevent water break-through

A black outer LDPE (low density polyethylene) sheath that is laminated to the

longitudinal aluminum, for water tightness and mechanical protection.

Conductors

All conductors shall be stranded copper or aluminum as specified in the Schedules. The

conductor shall be clean, uniform in size, shape and quality, smooth and free from scale,

spills, splits, sharp edges and other harmful defects.

They shall be circular, shaped, stranded, bunched and multiple stranded, as required, to

suit the cable specification and shall comply with the requirements of IEC 60228 where

applicable.

P a g e | 32

Where joints are permitted in individual wires, formed into a conductor, they shall’ be

made in the manner prescribed in the appropriate standard and the frequency shall

conform to the limiting dimensions stated therein. No joints shall be made in the

conductor after it has been formed.

Conductor Screening

Conductor screening shall be employed at rated voltages above 1.8/3.0 kV for cables

insulated with XLPE, and shall consist of a layer of extruded semi-conducting material

having a smooth even surface in intimate contact with the cable insulation and the

conductor, but easily strippable from the conductor surface.

Insulation

Power cables shall be insulated with one of the following materials EXCEPT where the

type of cable is definitely specified in detail in the Schedules:

Cross-linked polyethylene (XLPE) for 24/36 kV cables.

Only dry processes shall be used in vulcanizing and cross linking of the XLPE

insulation. Special precautions shall be taken to avoid ingress and spreading of moisture

and development of water-treeing. The Bidder shall documents the construction

measures used to achieve these requirements. The Supplier can purpose an alternative

treatment to prevent the possibility for treeing.

Core Screening

Core screening shall be employed at rated voltages above 1.8/3.0 kV for cable insulated

with XLPE, and shall consist of a layer of semi-conducting material having a smooth

even surface in intimate contact with the cable insulation and a concentric screen of

P a g e | 33

copper wires and tape applied overall. Full details of the method used for stripping the

screen shall be provided with the Tender.

Identification of Cores

The cores of all twin, three and four core power cables shall be identified by numbers

or colors in accordance with IEC standard or approved National Standard.

Laying-up and Fillers

The cores of all twin and multi-core cables shall be laid-up together with suitable fillers,

wormed circular and binding tapes applied overall.

The fillers for XLPE cables shall be non-hygroscopic. The direction of lay of the cores

shall be right-hand for all twin and multi-core power cables. The term "right-hand" has

the same meaning as for screw threads. All cables shall be circular.

Manufacturer's Identification

The manufacturer's identification shall be provided on outer sheath throughout the

length of the cables by means of a tape under the sheath printed with the manufacturer's

name. Alternatively the manufacturer's identification may be embossed on the outer

PVC sheath together with identification and voltage markings. The cables shall be

marked for each meter.

Testing

Notwithstanding that cables are manufactured to an approved National Standard all

cables, accessories and materials shall be subjected to and withstand satisfactorily the

test requirements detailed in this specification subject to any exceptions stated therein.

All materials shall withstand such routine tests as are customary in the manufacture of

the cables and Accessories included in the Contract.

P a g e | 34

Routine tests of XLPE cables and accessories

Routine tests shall be carried out on completed cable lengths of PVC or XLPE insulated

power cables in accordance with IEC 60502 and supplements, and shall include the

following:

PD measurement test (XLPE insulated cables only)

High-voltage test of main insulation

Electrical test of over sheath

Visual inspection

Special Tests

The Supplier shall carry out the special tests detailed in IEC Recommendation Nº 60502

and supplements as appropriate to the type of cable under test, and shall include the

following:

Conductor examination

Check of dimensions

Electrical test for cables of rated voltage above 3.6/6 kV

Hot set test for XLPE insulation

Tests at low temperature for PVC

The test shall carry out in presence of two engineers from PETL Co

Type Tests

The Supplier shall carry out the type tests detailed in IEC Recommendation No. 502

(1978) and supplements as appropriate to the type of cable under test.

P a g e | 35

These type test requirements may be waived on production of documentary proof that

samples of similar cable manufactured in the same works with the equivalent or larger

conductor section have passed identical or more onerous tests which have been

witnessed by an approved electricity authority or their duly appointed representatives.

Failure by the Supplier to provide such documentary proof in advance of cable

manufacture commencing will render the Supplier liable to carry out the full type test

program in entirety.


Conductors shall be tested in accordance with the following requirements:

Samples

Samples of individual wires shall be taken from each length of conductor before

stranding and a sample from each length of finished conductor shall be taken at the

option of the Engineer.

Failure

If a sample should fail, a second and third sample shall be taken from the same length

and if one or other of these additional samples fails under tests, the entire length of

conductor from which the sample wires are taken shall be rejected.

Tensile Tests

Tensile tests shall be carried out as detailed in the relevant Standard.

Wrapping Tests

Wrapping tests shall be carried out as detailed in the appropriate Standard.

P a g e | 36

Resistance Tests

Tensile tests shall be carried out as detailed in the appropriate Standard.

Test standard: IEC60230 & IEC60502-2 & IEC60811

Test on 600/1000 V Concentric Neutral Earth Cables

The Supplier shall carry out the tests detailed in the approved Specification.

After laying tests:

DC voltage test of oversheath

AC voltage test of main insulation

Sealing and Drumming

The cable shall be wound on strong non-returnable drums arranged to take a round

spindle of a section adequate to support the loaded cable drum during installation and

handling. The drum shall be lagged with strong closely fitting battens that shall be

securely fixed to prevent damage to the cable. Wooden drums shall be constructed of

seasoned timber to prevent shrinkage of drums during shipment and subsequent storage

on site. Each drum shall be clearly marked in a manner which cannot be obliterated with

the particulars of the cable including voltage, length, conductor size, number of cores,

type of protective covering, section number, gross and net weight, together with the

direction for rolling.

The ends of cables shall be suitably sealed to prevent the ingress of moisture. The end

of the cable left projecting from the drum shall at all times be securely protected against

damage by mishandling during transport or storage.

Drum lengths of cables shall not exceed the following:

P a g e | 37

24 and 36 kV, 1-core cables, maximum length 1000m

Current Carrying Capacity and Design Parameters

The maximum continuous current carrying capacity and maximum permissible

continuous conductor temperature, and the factors for determining such rating and

temperature shall be based on IEC Recommendation Nº 287 and subsequent

amendments and all conditions prevailing on the Site.

Cable Joints and Terminations

The Tender shall submit with his Tender drawings showing the types of joints proposed

for each of the cables included in the Contract.

The joints shall be of a watertight, "pull-over" heat shrink type, without molding, free

from sharp points or ridges, thoroughly clean internally and externally. The sleeves shall

be of sufficient diameter and length to permit color-to-color jointing without undue

bending, handling or deformation of the cores.

Terminations

Detailed drawings showing the types of cable sealing ends, terminal boxes and glands

and overhead line terminations shall be submitted to the Purchaser for approval. Stress

cones or other approved means shall be provided for grading the voltage stress on the

core insulation of screened cables.

Terminations for all HV or MV cable shall be of an appropriate heat shrink design

incorporating a suitable arrangement of stress control, and rain-sheds for outdoor use

Termination kits shall include suitable heat shrink tubing to effectively shroud, seal and

insulate the exposed cable conductor and connector, and shall include a heat shrink

glove to effectively seal the crutch of the cable to prevent ingress of moisture into the

interstices of the cable. Suitable arrangements shall be provided to earth the cable screen

P a g e | 38

and armor.

Terminations into cable boxes shall include brass compression glands and back nuts of

the correct size, which shall secure the cable outer sheath and ensure effective electrical

continuity between the cable armoring wires and the metal enclosures on which the

cable is terminated. At all rising terminations the cable inner sheath shall pass through

the gland to terminate not less than 6 mm above the gland.

Provision shall be made for earthing all sealing end base plates, cable boxes, glands and

armor clamps.

Instructions

As soon as possible after the commencement of a contract and before materials are

dispatched, copies of the jointing and termination instructions applicable to the joints,

sealing ends and terminations to be supplied shall be submitted in English to the

Purchaser for approval, together with details of the physical and electrical characteristics

of the filling medium proposed.

Materials

Sets of jointing materials for terminating cables shall be complete with all miscellaneous

jointing materials to complete the termination. One set of materials shall be sufficient

for terminating one end of the cable or cables specified into one joint box. Each set of

jointing materials shall be packed as one complete self-contained unit package.

Heat Shrink Materials

Heat shrink tubing and molded parts shall be flexible, flame retardant, polyolefin-based

material of electrical insulating quality, and shall be obtained from an approved

manufacturer. They shall be suitable for use indoors or outdoors in the conditions

prevailing on site.

P a g e | 39

Each part shall bear the manufacturer's mark, part number and any other necessary

markings to ensure correct identification for use on the correct size and type of cable.

Each set of parts shall be packed as one unit with fill and complete installation

instructions and clearly marked to show the application.

The material shall reduce to the predetermined size and shape when heated above 120ºC.

The components shall also be provided with an internal coating of hot melt adhesive

compound that shall not flow or exude at temperature below 85ºC. All parts and

materials shall be tested to a program of tests to be agreed with the manufacturer.

1. SELF SUPPORTED AERIAL BUNDLE CABLES (ABC CABLES)

General

The Aerial Bundle Cable shall be 600/1000 V grade cross-link polyethylene and shall

be of the types and construction stated in the Schedules. All cables shall be

manufactured and tested to the CENELEC HD 626. Cables shall be designed for a

maximum continuous conductor temperature of 90ºC and for operation on a system with

the neutral solidly earthed.

The cable shall be of neutral messenger type.

Conductors

The conductors shall be hard drawn stranded aluminum and shall comply with all the

requirements of EC 60228.

Insulation

The materials used in the manufacture shall be black weather-resistant cross-

linked polyethylene with a high resistance to ultra violet radiation. The insulation

P a g e | 40

shall fit closely on but shall not adhere to the conductors.

Cable Identification

An approved method of identifying the manufacturer and year of manufacture

shall be provided throughout the length of all cables.

Core Identification

Identification of individual cores of the cable shall be by longitudinal ridges on

the insulation and shall be provided throughout the length of all cables.

Testing

All cables, accessories and materials shall be subjected to and satisfactorily

withstand the test requirements specified herein. All materials shall withstand

such routine tests as are customary in the manufacture of the cables and

accessories included in the Contract.

Sealing and Drumming

The cable shall be wound on to a strong non-returnable drum with enclosed

flanges and barrel arranged to take a round spindle of a section adequate to

support the loaded cable drum during installation and handling. The drum shall

be lagged with strong closely fitting battens, which shall be securely fixed to

prevent damage to the cable. Wooden drums shall be constructed of seasoned

timber to prevent shrinkage of drums during shipment and subsequent storage

on site. Each drum shall be clearly marked in a manner that cannot be obliterated

with the particulars of the cable, including voltage, length, conductor size,

number of cores gross and net weights, together with direction for rolling.

The ends of the cables shall be sealed by enclosing them in approved caps, tight

fitting and adequately secured to prevent the ingress of moisture.

The end of the cable left projecting from the drum shall at all times be securely

protected against damage.

P a g e | 41

MV OVERHEAD LINE MATERIALS

2. CONDUCTORS AND ACCESSORIES

Standards

Aluminum clad steel reinforced aluminum conductor (ACSR/AW) aluminum alloy

conductor (AA) and copper conductors shall comply with IEC standards or such

other equivalent recognized national standard which the Bidder shall define.

Manufacture of ACSR and Aluminum Conductor

The manufacture of the ACSR/AW and AA conductor shall be carried out in a

portion of the works specially set aside for such purposes. Precautions shall be

taken during the manufacture and storage of ACSR conductor to prevent the

possibility of contamination by copper or other materials that may adversely

affect the aluminum. In the event of any machinery used for conductor

manufacture being used for materials other than aluminum or steel strand the

Supplier shall furnish the Purchaser with a certificate that the machinery has

been thoroughly cleaned before use on aluminum or steel wire and the conductor

supplied under this Contract is free from contamination.

The aluminum shall be of the highest purity commercially obtainable and the

Supplier shall submit certificates of analyses giving the percentage and nature

of any impurities in the metal of which the aluminum wires are made.

There shall be no joints in steel wires forming the core of composite conductors,

excepting those made in the base rod or wire before drawing, unless the core

consists of seven or more wires. In the latter case joints in individual wires are

permitted, additionally to those made in the base rod or wire before drawing,

but no two joints shall be less than 15 m apart in the complete steel core.

The steel strands shall be performed so that they remain inert and do not move

relative to each other when the conductor is cut.

P a g e | 42

The steel core wires shall be uniformly covered with approved grease. In addition

the inner aluminum wires shall be similarly treated. The grease shall fill all

internal spaces except that excess grease shall be removed from the conductor

before the application of the final layer of wires.

The outermost layer of all conductors shall be stranded with the right-hand lay.

Mechanical Properties

a. Steel Core

The steel core shall be comprised of stranded aluminum covered steel wire in

accordance with ASTM B-416, Concentric-Lay-Stranded Aluminum-Clad Steel

Conductors. The covering on each individual wire shall achieve a continuous

dependable weld with the steel core and shall provide a uniform guaranteed

minimum thickness of aluminum of 10 percent of the wire radius. The zone of

diffusion shall be clearly defined.

b. Grease

The grease to be used in the conductor shall be chemically inert, shall not flow

within nor exude from the conductor when at a temperature of 90ºC nor shall

its characteristics be impaired after heating to 20ºC above its drop point for

150 hours. The grease shall be suitable for service temperatures in the range

-10ºC to +75ºC. The suitability of the grease shall have been proven by tests

acceptable to the Purchaser.

c. Conductor Characteristics

The conductors shall have the mechanical and physical properties

approximating to the details given in this technical specification. The actual

characteristics are to be set out in the Technical Schedules.

ACSR/AW Conductor

P a g e | 43

Code Name Unit DINGO COYOTE RABBIT DOG

Equivalent copper area mm2 97.9 80.7 32.3 64

Overall diameter mm 16.75 15.89 10.05 14.2

Stranding Aluminum Nº/mm 18/3.35 26/2.54 6/3.35 6/4.72

Steel Wire Nº/mm 1/3.35 7/1.91 1/3.35 7/1.57

Maximum d.c. resistance at 20°C Ω/km 0.1815 0.2187 0.5426 0,273

Nominal breaking load kN 35.7 46.4 18.3 32,7

Weight kg/km 506 522 214 390

Stranded Copper Conductors

Conductor Type Copper

Nominal Cross-sectional area 35 mm2

d. Conductor Drums

General

Conductor shall be supplied on drums of sufficient sturdiness to withstand

shipment and transportation, and the drums shall be securely battened to

prevent damage to the conductor. Each drum shall be marked with the type,

size and length of conductor on the drum, and with the direction of rolling.

Conductors shall be supplied in lengths as long as can be conveniently

handled, and placed only on drums appropriate to its particular size.

The Bidder shall submit with his Bid, drawings showing the general details

and dimensions of the drums to be offered for approval.

Materials

All wooden components shall be manufactured from sound defect-free seasoned

P a g e | 44

softwoods and suitable for prolonged storage without deterioration. The wood

shall be planed or finely sawn to facilitate accuracy in assembly and clear

stenciling. The thickness of the boards of each ply or component part shall be of

reasonable uniformity.

Design

The flanges of drums shall be constructed from two plies of wood, laminated in

such a manner as to give cross grain to each other. The boards shall be close butted

to provide maximum support. Fastening of the flanges shall be with suitable bright

nails with the heads countersunk on the inside of the flange.

A flange conductor hole of sufficient diameter for the free passage of the

conductor shall be cut in one flange. A suitable sheet metal plate shall protect the

exposed end of the conductor.

The spindle hole shall be round and cut through the center of the board of each

flange ply. The spindle holes, of not less than 80 mm diameter, shall be reinforced

by a 6 mm mild steel plate bolted to each flange.

The drum barrel shall be of the segmental type, with supports and cross struts.

The barrel lagging shall be closely butted and shall provide a smooth external

surface to the conductor. The barrel and flanges shall be securely clamped

together.

Drainage holes shall be provided through each flange as close as possible to the

underside of the barrel lagging.

Circumference battens shall enclose the conductor space completely. They shall

fit flush with the outer flanges. Battens shall be securely fixed in an approved

P a g e | 45

manner.

End Fixing of Conductors

The inner end of the conductor shall be brought through the drum flange and

secured by staples. The outer end shall also be secured to the inner face of the

flange in a similar manner.

Protection of Conductors

The drum barrel shall be covered with a layer of waterproof sheet plastic or wax

paper or in the case of aluminum conductors shall be painted with aluminum flake

paint. The inner cheeks of the drum shall be painted with a bitumen-based paint

or in the case of aluminum conductors with aluminum flake paint. The outer layer

of conductor on the drum shall be covered by a layer of sheet plastic or waxed

paper secured immediately under the circumference battens so that it is not in

contact with the conductor.

All bolts and nuts on insulator string fittings shall be galvanized as specified and

shall be locked in an approved manner.

ADSS Fiber Cable

Purpose and Scope

This specification sets out the requirements for the manufacture, testing and

delivery of optical fiber cables for use on the electricity transmission network in

a totally exposed environment.

Items covered by this technical specification, are listed as follows:

P a g e | 46

ITEM ITEM DESCRIPTION

No.

All Dielectric Self Supporting (ADSS) Overhead Optical Fiber Cable:

1 Single Mode 12 Fibers – Short Span (0 – 150m)

2 Single Mode 36 Fibers – Short Span (0 - 150m)



References

Applicable Standards

The optical fiber cables shall be designed, manufactured and tested in accordance

with the relevant parts of the following Standards and all amendments issued from

time to time except where varied by this specification.

STANDARD TITLE

AS/ACIF Requirements for Customer Cabling Products.

S008:2006

ITU Characteristics of a Single-Mode Optical Fiber Cable (Zero Recommendation Water Peak)

G.652

ANSI TIA-598C Optical Fiber Colour Coding

AS 1049 Telecommunications Cable – Insulation, Sheath & Jacket.

AS 2857 - 1986 Timber drums for insulated electric cables and bare conductors

AS 3983 Metal drums for insulated electric cables and bare conductors

ISO 9002 Quality systems - Model for quality assurance in production,

installation and servicing

Drawings

There are no drawings attached to this specification.

P a g e | 47

Environment

Aerial optical fiber cables will be exposed to the following environmental conditions:

DESCRIPTION CONDITION

Temperatures Not exceeding 45oC as determined by a shaded

thermometer (Summer day time)

Minimum -5ºC (Winter night time)

Solar Radiation Level 1100 watts per square meter with high ultraviolet

content

Precipitation Tropical summer storms with gust wind speeds above 160km/h and an annual rainfall in excess

of 1500mm

Atmospheric classifications Areas of coastal salt spray and / or industrial pollution with equivalent salt deposit densities in

the range of 2.0 – 3.0 g/m2 Design and Construction

General

Metal Free

The offered cables shall be completely metal free and shall comply with the

product approval requirements of AS/ACIF S008:2006.

5.1.2 Standard product range

It is preferred that the cables be part of or become part of the standard product

range produced by the manufacturer.

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5.1.3 ITU-T Recommendation The optical fiber cable as specified shall have single mode optical fibers in

accordance with ITU-T Recommendation G.652.

5.1.4 Outside diameter – Short span The outside diameter of the ADSS Short Span cable shall be between 14mm and

14.99mm.

5.1.5 Outside diameter – Long Span The outside diameter of the ADSS Long Span cable shall be between 18mm and

18.99mm.

5.2 Optical Fiber Requirements

5.2.1 Fiber Type The optical fibers will be single mode fibers with the following characteristics.

5.2.2 Fiber Characteristics

Single Mode: The characteristics of each single mode optical fiber in the optical fiber cable will

adhere to the ITU-T’s recommendation G.652 and as follows:

Transmission wavelength 1310 nm and suitable for 1550 nm

Mode field diameter 9.2 +- 0.4 m at a transmission

Wavelength of 1310 nm.

Attenuation Not greater than 0.40 dB/km at an optical wavelength of 1310 nm and

0.30 dB/km at 1550 nm

Point Discontinuity Not greater than 0.1 dB at 1310 and

1550 nm.

Cable Cut-off Wavelength < 1260 nm

Zero dispersion 1312 +/- 10nm

Dispersion Slope at Zero dispersion ≤0.093ps/(nm2-km)

Wavelength

Optical cladding diameter 125 m 1.0 m

Life span Greater than 35 years

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5.2.3 Fiber Coatings The secondary coating is required to be a tight UV Acrylate coating and shall be

easily removed by mechanical means for jointing purposes. Preference is likely

to be given to fibers, which have a primary buffer coating of 250 15 micron low

modulus UV, cured

Acrylate material. Thus Tenderers are encouraged to offer prices for totally UV

cured Acrylate coated fibers where possible. Tenderers may offer more than one

primary, buffer coating material. In such cases Tenderers should provide as much

information as possible regarding the physical, mechanical, and transmission

performance of such fibers, with particular regard to the relative susceptibility to

hydrogen degradation compared with UV Acrylate coated fiber.

5.2.4 Identification of Individual Fibers

The colours of individual fibers and tubes as well as other cable components shall

allow for the unique identification of individual fibers within the cable and shall

be in accordance with AS/ACIF S008:2006.

5.2.5 Factory Joints The fibers shall not be jointed within any un-installed cable length without prior

approval by the Purchaser. Where such approval is given, there shall be a

maximum of one (1) joint allowed in any continuous length. This joint shall have

a two way average splice loss of less than 0.2 dB at 1310 nm and 1550 nm.

5.2.6 Point Loss in Un-Installed Cable

For the un-installed optical fiber cable there shall be no point loss (of any cause)

in any single fiber, whose average two way attenuation exceeds 0.01 dB at 1310

nm and 1550 nm.

5.3 Cable Requirements

5.3.1 Moisture Exclusion

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As the cable may be subjected to total water immersion, the cable shall comply

with the requirements for water penetration specified in Clause 25, Method –F5B

of IEC60794-1-2 to prevent the ingress of moisture and other impurities to the

optical fibers.

Dry core water blocking techniques shall be used for all cables.

5.3.2 Cable Configuration

The configuration of the cable shall be such that it is arranged in tubes of twelve

(12) fibers. Filler tubes will be used as required.

5.3.3 Cable Sheathing

The cable sheath shall consist of material compatible with the hauling of cable

through ducts and shall be resistant to insect and termite attack.

The cable sheath shall be resilient to ageing and embrittlement from heat and

ultraviolet radiation such that the life expectancy of the cable is a minimum of 35

years.

The entire cable shall consist of electrically insulating material.

Distance markings shall be provided on the cable (in meters) in order to assist

possible fault location in the future.

A cable number and “PETL” name shall be provided on the cable. Long Span

ADSS cable shall be marked with the words “LONG SPAN”.

The markings are to be legible and indelible and shall not reduce the effectiveness

of the cable in resisting insect and termite attack.

5.3.4 Cable Design

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The cable is to be of non-metallic construction.The cable will incorporate a

strength member of glass reinforced plastic or equivalent.

The optical fibers shall not be constrained firmly against other fibers, strength

members, moisture barrier compound or any other cable components in order that

the fiber strain is de-coupled from the strain in other components when the cable

is under tension.

The preferred construction type is "Loose Tube".

5.3.5 Cable Mechanical Requirements

The cable must be able to withstand a directly applied long term crush loads of 1

kN per 100 mm without increase in optical attenuation for any fiber or any

decrease in the integrity of the optical fiber cable over its designated lifetime. Test

method as per IEC 60794-1.

5.4 Drawings Tenderers shall provide detailed drawings of the cross-section of the items

offered.

6. Performance and Testing

6.1 Tests

6.1.1 Standards Cables shall be tested in accordance with the requirements of the relevant

Australian Standards.

6.2 Routine Test

6.2.1 Attenuation

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The attenuation of the fiber shall be tested using a 1310 nm & 1550 nm light

source at one end of the fiber and an optical level meter at the other end.

6.2.2 Continuity

Continuity shall be tested at 1310 nm & 1550 nm by measuring backscattered

light using an Optical Time Domain Reflectometer (OTDR), which is adjusted to

see the whole length of the fiber. This measurement shall be done from both ends

of each fiber.

6.2.3 Recording

The overall attenuation and the OTDR traces shall be recorded and shall form part

of the test certificates.

6.3 All Dielectric Self Supporting (ADSS) Optical Fiber Cable

6.3.1 Type Tests

6.3.1.1 Graph Tenderers shall provide a graph of cable strain versus fiber strain.

6.3.1.2 Results of Type Testing Results of type testing previously carried out on the same ADSS type offered shall

be provided at time of tendering. 6.3.1.3 Breaking Load Test

Following completion of the stress/strain test, the tension shall be increased until

breakage load and the load at which the ADSS or fitting began to yield under

tension shall be recorded.

6.3.1.4 Crushing Force Test A sample of the optical fiber core shall be subjected to a lateral crushing force,

which shall be slowly increased from zero. The transmission characteristics of the

optical fibers shall be continuously monitored. A graphical plot of transmission

loss versus lateral force shall be prepared. The lateral force shall be increased until

the change in transmission loss of the optical fibers exceeds 0.1dB, test method

as per IEC60794-1.

6.3.2 Routine Tests

The optical fiber attenuation and continuity for each fiber of each cable drum

length shall be measured and recorded prior to shipment from the manufacturing

plant. The test results shall include date of test, drum number, and drum length

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and names of test personnel.

6.6.1.1 Type Test Certificates

All type tests shall be completed and certificates submitted as part of the tender

response.

6.6.1.2 Routine Test Certificates Routine test certificates shall be submitted prior to the dispatch of the cable from

the manufacturing plant.

7. Risk Assessment

There is no requirement for manufacturer provided safety risk assessments for the

items covered by this specification.

8. Quality Assurance

8.1 Purchasers Policy It is the Purchaser’s policy to procure goods, equipment and services from sources

that demonstrate the ability to supply quality products.

8.2 Documentary Evidence Documentary evidence shall be provided concerning the level of quality system

certification associated with the Tenderer and/or Manufacturer. This

documentation shall include the Capability Statement associated with the Quality

System Certification.

9. Samples 9.1 Production Samples

When requested, production samples of each item offered shall be submitted to

assist in the evaluation of the offer.

Each sample shall be delivered freight free, suitably packaged and labelled with

the following information:

Name of Supplier and this Contract No.

Contract Item Numbers

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Any supporting data on features or characteristics

10. Packaging and Marking

10.1 General

10.1.1 Damage Free It is the appointed supplier's responsibility to ensure that the fiber optic cable is

delivered on site damage free. Storage, packaging, delivery to site and all other

aspects of cable protection are the responsibility of the Tenderer.

10.1.2 Drum standards Optical fiber cables may be supplied on either timber drums or steel drums

complying with the requirements of AS 3983. 10.1.3 Standard for Timber Drums

Operational difficulties are anticipated with the use of cable drums manufactured

in accordance with AS 2857-1996. Hence this specification is based on cable

supplied on timber drums manufactured in accordance with the requirements of

superseded standard AS 2857-1986. 10.1.4 Drum sizes

Optical fiber cables shall be supplied on drum sizes and in the lengths as detailed

in Appendix A.1 to this specification. 10.1.5 Length

The cable shall be in one (1) length on each drum.

10.1.6 Winding The cable shall be wound in such a way as to preclude the possibility of chafing

or damage to the cable during winding and transport. The winding tension shall

be as low as possible, being only as high as that required to minimize movement

of cable between adjacent layers.

10.2 Lagging The cable shall be protected by external lagging to ensure that it is delivered undamaged

giving due consideration to the methods and distance of transportation and handling.

Sheet form wrapping alone is NOT acceptable.

10.3 Drum Durability

All drums must be of suitable quality and robustness to withstand a minimum of months

twenty-four (24) exposure to all types of weather conditions during outdoor storage

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without deterioration.

10.4 Drum Surface Treatment

Drum surface treatment to protect against weather, the environment, galvanic action, and

corrosion is required.

Suppliers shall state the type of surface treatment applicable to drums for each item.

10.5 Marking of Drums

10.5.1 Standard The marking of information on the cable drum shall be in accordance with Clause 16.3

of AS / NZS 5000.1. In addition, the following information shall be provided indelibly

and legibly marked directly on the flanges: a) The name PETL and the relevant stores stock code.

b) Contract number.

c) Order release authority or purchasing order number.

d) Manufacturer's traceability number – derived from Manufacturer’s first

letter, hyphen, batch number, hyphen, drum number for this batch.

10.5.2 Size and location Marking at least 25 mm high shall be located on both outside flange surfaces near the

spindle.

10.5.3 Direction of rolling Drums shall be marked with the preferred direction of rolling.

10.6 Fixing of Cable End The inner end of the cable shall be secured to the drum to ensure that the end will not

flick off the drum barrel when the cable is being run out. 10.7 Quarantine Requirements

Should the items offered be supplied from overseas manufacturers, then it is mandatory

that all conditions and inspections required by the Australian Quarantine Act be met and

that all these costs be included in the tendered price. In particular, timber crates must be

fumigated with methyl bromide with a concentration of 48 grams per cubic meter for 24

hours at 21 C. The supplier shall ensure that the procedure does not produce any

deleterious effects to the cable or the drums.

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11. Service Performance

Suppliers shall state:

(a) the period of service achieved by the items offered within Palestinian

service conditions;

(b) International electricity supply authorities who have a service history of

the items offered; AND

(c) Contact names and phone numbers of relevant employees of those supply

authorities who can verify the service performance claimed.

12. Reliability

12.1 Service Life Suppliers are required to comment on the reliability of the cables and the performance of

the materials offered for a service life of 35 years under the specified system and

environmental conditions. 12.2 Evidence in Support of Reliability

Such comments shall include evidence in support of the reliability and performance

claimed including information on Failure Mode and Effect Analysis.

13. Training

Training material in the form of drawings, instructions and/or audio visuals may be

required to be provided for the items accepted under the offer.

Tenders shall state the availability of training materials which should include but is not

limited to the following topics:

Handling Storage Application (particularly in areas of heavy coastal pollution) Installation, Maintenance Environmental performance, Electrical performance Mechanical performance Disposal

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14. Environmental Considerations

Suppliers are required to comment on the environmental soundness of the design and the

materials used in the manufacture of the items offered. In particular, comments should

address such issues as recyclability and disposability at the end of service life.

15. Information To Be Provided

15.1 Specific Technical Requirements The specific technical requirements for the items offered shall be as stated in Attachment

1 of this specification. The supplier shall provide all details requested by Attachment 1

and shall guarantee such data.

15.2 Checklist of Supporting Documentation

Attachment 2 details a checklist of supporting technical documentation which is required

to be submitted with the offer.

15.3 Fiber Information

15.3.1 Fiber Characteristics The Tenderer is required to supply the following:

(a) A graph of attenuation versus wavelength over the range of 700 nm to

1700 nm for single mode fibers. (b) A typical graph of fiber attenuation for the 1310 nm & 1550 nm

wavelength for single mode fibers for the temperature range of 5oC to 75oC.

(c) Details for the strength of the fibers.

(d) A graph of attenuation verses cable strain for each cable offered.

(e) Information on the chromatic dispersion co-efficient in ps/km/nm with

respect to zero dispersion wavelength in the region of 1310 nm and 1550

nm for single mode fiber.

(f) Information on the Dispersion Slope at Zero Dispersion Wavelength in ps/(nm2-m)

15.3.2 Fiber Performance Tenderers shall provide information regarding the physical, mechanical, and transmission

performance of fibers, with regard to the relative susceptibility to hydrogen degradation.

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15.3.3 Field Jointing

Tenderers shall provide details of their fibers performance to different jointing techniques

(including arc fusion and mechanical spicing), preferably in the form of histograms

showing minimum obtainable splice losses.

15.4 Information on Cable

15.4.1 Moisture Exclusion Full details of the water blocking compound shall be supplied by the Tenderer, including

the method of removing the compound prior to cleaving and splicing.

15.4.2 Cable Sheathing The Tenderer must include in the tender documents information detailing the design and

performance of the sheath and jacket of the cables offered to demonstrate that the cable

is adequate for a 35 year service life time. The information should include

The material used as the outer sheath. Effectiveness of resisting pest attack as described

in Clauses 4.1 and 4.2. The thickness of the outer sheath. Resistance to environmental stress cracking and thermal and ultraviolet radiation ageing.

15.4.3 Cable Design

The Tenderer is to provide details of the design of the cable. The documentation provided

will include a cross section of the cable, nominating the materials used on the drawing

and any other relevant information.

15.4.4 Material Properties

The Tenderer shall supply a full listing of the material components used in the cable with

details on toxicity and safe handling of the materials.

15.4.5 Fiber Colours Tenderers are required to supply details of the colour of fibers.

15.4.6 Fiber Tube Colours

Tenderers are required to supply details of the colour of fibers tubes

15.4.7 Vibration Testing

The Tenderer will supply results of vibration resistance tests.

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15.4.8 Service Lifetime The Tenderer will supply information to support a cable life time of 35 years for the

environmental conditions listed in Clause 4.1. Details as to potential damage to fibers

caused by cable materials with particular reference to hydrogen producing agents will

be included.

15.4.9 Sag-Strain Characteristics for Aerial Cables

The fiber optic cable must have sag-strain characteristics to enable its installation onto

existing power poles while maintaining clearances to low and high voltage mains and

statutory clearances. The Tenderer shall supply stringing chart(s) or tables showing

optical fiber strain and sag-tension information for the following conditions:

Range of spans 0-250 m in steps of 20 m.

Range of cable tensions 0-100% of the maximum recommended cable tension.

Range of temperatures

5°C to +75°C in steps of 5°C.

Tenderer to indicate the constant horizontal tension (@ 15ºC no wind).

The Tenderer shall supply details of all assumptions used in calculating stringing

chart(s) or tables.

15.5 Cable Installation Information

The Tenderer will nominate any special requirements that PETL will need to adhere to

during the installation of the fiber to ensure that the cable is installed damage free and

the lifetime of the installation is not unnecessarily reduced.

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MV DROP-OUT FUSE SWITCH

All Drop-out Fuse Switches shall be of 3 separate, single pole, vertical-mounting,

channel base pattern drop out fuse switch with fuse holder complete for erecting on

standard lattice towers and all the conductor straps, nuts, bolts, and washers necessary

to mount and electrically connect the isolators, together with all auxiliary equipment,

on their supports shall be provided

All Drop-out Fuse Switches shall be supplied complete with necessary pole coupling

rods, operating rods, operating handles and all accessories.

Contacts shall be of the high pressure, self aligning type made of metal not subject to

corrosion. The design of the contacts shall be such that periodic lubrication of their

surface is unnecessary for efficient operation under the atmospheric and climatic

conditions existing at site.

The fuse switch shall have load breaking capacity and in open state fulfill the

requirements for circuit isolation (isolator function). Switching and fuse replacement

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shall be done from the ground. A number of insulated operation rods shall be supplied.

The fuse elements shall be of the current limiting double tail button head type.

MV LINE ISOLATORS AND SWITCH DISCONNECTORS

3. ISOLATORS

All isolators shall be of the triple pole, gang operated open type, suitable for outdoor

installation designed in accordance with IEC 60129. The isolators shall be for

horizontal or vertical mounting in standard lattice towers and shall be supplied

complete with base plates, pole coupling rods, operating rods, angels and triangular

plates for operating rods, operating handles and all accessories, including items such

as guide plates or mounting brackets. Facilities shall be incorporated in the design for

aligning the main contacts and adjusting the linkages during erection and maintenance,

and all the conductor straps, nuts, bolts, and washers necessary to mount and electrical

connect the isolators, together with all auxiliary equipment, on their supports shall be

provided, if are requested.

Provision shall be made for adjusting the insulator posts in the vertical axis.

Contacts shall be of the high pressure; self aligning type made of metal not subject to

corrosion.

The design of the contacts shall be such that periodic lubrication of their surfaces is

unnecessary for efficient operation of the switch. Service conditions require that

isolating switches shall remain live, and in service without being operated for periods

of up to two years. The contacts will therefore be expected to remain capable of

carrying their rated load, and short circuit currents without overheating or welding for

this period under the atmospheric and climatic conditions existing at site.

Silver plated contacts shall not be offered unless a guarantee is provided that there will

be no necessity for periodic re-plating.

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Isolators shall be designed and tested such that the isolator cannot be opened by forces

due to short circuit currents passing through it, and shall be self-locking in both the

"open" and "closed" positions.

Provision shall be included for locking the switches in either the open or closed

positions by means of padlocks that will be provided by the Purchaser.

Where "outboard" bearings are required they shall be suitable for mounting at either

end of the isolator.

All roller or ball type bearings shall be grease packed and efficiently sealed to prevent

the ingress of dust and moisture. Completely enclosed, weatherproof type bearings

that require no maintenance are preferred.

When made of steel or malleable iron, operating boxes, handles, rods, tubes and other

fittings for outdoor equipment shall be hot dip galvanized.

Bidders shall state in the Technical Schedules the load current, line charging current

and transformer magnetizing current which they guarantee that all isolators offered

will break without damage to the contacts. Bidders shall declare in their Bid whether

special contacts are required to achieve any of the current breaking conditions; details

of any such contacts shall be given.

Full details of all heavy current carrying contacts which incorporate moving parts shall

be submitted with the tender together with associated electrical and mechanical type

test reports.

Polymeric tension insulator 33 kV:

- Voltage: 33 kV

- Total length mín 585 mm

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- Max working load: 70 kN

- Breaking load: 70 kN

- Creepage distance: mín 1170 mm

4. ON LOAD SWITCH ISOLATORS (SWITCH

DISCONNECTORS)

All isolators shall be of 3 separate, single pole and shall be prepared for extension

with load breaking heads allowing breaking of minimum 630 A when operating the

isolator. The isolator functions shall be retained when the load break head is mounted.

The load interruption shall take place within the interrupter head without an external

arc or flame conforming to IEC 60265, Category A. Electronic controlled arc

interrupters are not acceptable.

The load interruption shall be achieved by providing a parallel circuit for re-directing

the load current path from the main isolator contacts at the instant of their separation.

The design of the equipment shall allow the replacement of load interrupter head after

a specified number of operations. The manufacturer shall indicate the number of load

break operation possible without changing the interrupter head.

The inner layer of the arcing chamber shall be suitable for generating arc-quenching-

gas. The generated de-ionized gas shall extinguish the arc and be dissipated through a

rear exhaust chamber, well clear of the switch.

The internal contacts shall be spring loaded and be of such design as to provide a

positive and independent tripping action.

The interrupter contacts shall not be in the main current path when the main contacts

are in a fully closed position.

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The load interrupter head shall be designed to prevent leakage of water to the arcing

chamber (where the control mechanism including the spring for opening and closing

is housed) and be made of non corrosive materials.

5. OPERATING HANDLE

Operating mechanisms shall be designed so that all three poles close simultaneously

and be arranged so that any mechanism may be mounted at either end of the supporting

structure. All operating handles shall be securely earthed.

6. REMOTE CONTROL

It shall be possible to equip the isolators and switch isolators with a motor driven

mechanism connecting to the normal operation rod. The switches must be so designed

that such installation also can be done at a later stage. Where the motor operated

mechanism is specified it shall be designed to provide electrically initiated opening

and closing of the isolator from local or remote switches or relays. Local manual

tripping shall also be provided together with manual closing of the isolator; the manual

closing operation shall reset a spring or weight operated mechanism.

Provision shall be made for locking the local tripping device with a padlock to be

supplied by the Purchaser. The mechanisms shall be totally enclosed in weatherproof

and vermin proof metal panel with padlock hasp.

Automatic operating mechanisms shall be provided with an auxiliary switch to isolate

the trip or operating coil when the switch is opened.

Auxiliary contacts should clearly indicate the position of the switch.

7. RATING PLATE

The rating and data of the load break switch shall be engraved or embossed on a

weather and corrosion proof metal plate. The rating plate containing the following

information shall be positioned at the base supporting frame of the post insulator and

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shall be prominently visible.

a) Manufacturer's Identification (Trade Mark)

b) Country and Year of Manufacture.

c) Number and the Year of the standard adopted.

d) Designation of Type, Class etc.

e) Rated voltage and frequency (kV & Hz)

f) Rated 1 minute power frequency withstand voltage (kV) wet.

g) Rated lightning impulse withstands voltage (kV) dry.

h) Rated continuous current (A)

i) Rated short circuit making current (kA)

j) Rated short time (1 sec.) current (kA)

k) Total net weight (kg.)

l) Serial Nº CEB/LB/

8. TESTS

Equipment shall be routine and type tested in accordance with IEC 60129

LIGHTNING ARRESTER

9. DESIGN

This section covers the design, manufacture and testing of lightning arresters for

outdoor service.

The arresters shall be capable of protecting the following equipment:

Transformers which are directly connected to a line

Transformers which are connected to a line via cables

Capacitors

Cables

Circuit breakers and isolators

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Instrument transformers

The outdoor lightning arresters shall be of the metal oxide gap-less type, complying

with IEC 60099-4.

The lightning arresters shall have the following characteristics:

Description Unit Nominal voltage level

22 33

Rated voltage of arrester kV 12.7 19

Nominal discharge current (8/20 µs) kA 10 10

Class Distribution Min. protective ratio 2 2

The arresters shall be designed horizontally or vertically (standing or hanging) in

standard lattice towers. The arresters shall be supplied complete with fixing materials

and connection clamps.

The lightning arresters shall be fitted with a pressure relief device.

All arresters shall be fitted with in corrodible metal nameplates which are visible when

the arrester is completely mounted and which clearly indicate the data specified in

IEC in engraved or embossed characters.

All external ferrous parts shall be hot-dip galvanized.

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10. PROTECTION CHARACTERISTICS

This is a combination of the following:

Maximum residual voltage for steep current impulse (1/20 µs)

Maximum residual voltage for current impulses with waveform (8/20 µs) and

0.5, 1.0 and 2.0 times nominal current

Maximum residual voltage for switching impulse (30-100/60-200 (µs)

The protection level for lightening impulse is the highest of:

maximum residual voltage for steep current impulse divided by 1.15, and

maximum residual voltage at nominal current and 8/20 µs

The protection level for switching impulse is the maximum residual voltage at the

specified switching impulse current.

The protection level shall have at least a margin of safety of 30% compared to the BIL

of the arrester housing.

11. ENERGY REQUIREMENTS

The lightning arresters shall be designed to minimum line discharge class 2 according

to IEC 99-4 for heavy duty arresters.

12. HOUSING

The outer housing shall be of a silicone rubber material offering high resistance to

pollution. The specific creepage distance for any arrester shall not be less than 31

mm/kV system voltage, corresponding to heavy pollution according to IEC.

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13. TESTS

Lightning arresters offered or supplied to this specification shall comply with the tests

detailed in IEC 99-4 including wet tests and any additional tests specified. Tests shall

include requirements set out in the following:

Certified copies of type test reports shall be submitted with the bid and shall include

calibrated oscillogram demonstrating that each type of arrester offered complies with

the minimum specified requirements. The catalogue numbers applicable to each

arrester shall appear on the oscillogram. The time to spark-over applicable to each test

involving spark-over of the series gap shall be clearly shown.

Bidder should state what routine tests are carried out to prove the effectiveness of the

seals of the arresters.

Bidder should state what tests are carried out to prove the capabilities of the arresters

to withstand the effects of a multiple lightning strike.

AUTORECLOSER

14. GENERAL

The autorecloser shall be designed for pole mounting with the following features:

i. Ability to distinguish between permanent and transient/temporary faults.

ii. Ability to interrupt fault currents and thereafter restore every supply.

iii. Ability to switch normal load currents.

iv. Ability to coordinate with other protective devices such at drop out fuses,

sectionalizes and circuit breakers controlled by normal IDMTL protection

relays.

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15. MODES OF OPERATION

Autoreclosers shall be equipped to provide three phase trippings and reclosures, then

lockout after a pre-selected sequence of three phases unsuccessful reclosures.

If a reclosure is successful the operating mechanism shall re-set to make available the

full sequence of operations.

A minimum availability of four opening operations shall be provided with an

autoreclose facility on the first three, the fourth opening shall cause lockout. Once the

reclose is locked out manual resetting is required in order to restore service.

The number of fast or slow trip operations shall be adjustable between 0 and 3 by

means of an easily accessible setting mechanism.

A separate handle shall be provided which blocks reclosing after the first tripping

although manual closing shall still be possible. It shall be possible to set the recloser

to lockout after any number of opening operations.

It shall be possible by a simple setting device to select the number of operations which

the recloser will perform automatically and also the time delay which may be applied

to each individual operation independent of the other operations.

16. OPERATING MECHANISM

The closing mechanism shall be solenoid operated whereby the solenoid during

closing charges a spring which drives the tripping mechanism.

The tripping shall be coil initiated via commands from the control/protection system.

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17. POWER SUPPLY

The recloser shall preferably be completely self contained deriving all its energy from

the feeding side of the HV network. High voltage operated solenoids are preferred.

The control and protection facilities may be operated by means of current transformers

on the feeding side bushings. If batteries are provided for control, protection and

tripping batteries are provided for control, protection and tripping functions detailed

capacity calculations are to be provided showing the number of in/out operation the

battery can handle in addition to the normal control/protection requirements of the

stated ambient temperatures. A minimum of 3000 in/out operations is required with a

maintenance free 90 V Lithium battery with minimum battery life span of 10 years. A

low battery voltage signal shall be provided.

18. CONTROL CABINET

A separate control cabinet shall be provided either mounted on the recloser tank or

connected to the recloser by means of 10 meter multicore cable. The cabinet shall have

a heater for connection to external power supply. The cabinet shall be dust and vermin

proof and protected against direct sunshine by means of a shade. Ingress of water shall

not be possible.

19. CONTROL REQUIREMENTS

The ARC shall be controlled by a microprocessor control unit with integrated

protection functions. The control unit shall have a serial interface based on a IEC serial

interface standard for communication with a SCADA system via an RTU

The control unit shall have a socket for serial communication and downloading of

information to a hand-held external unit from the memory.

The autorecloser shall have facilities for manual tripping and locking out.

The following control functions shall be provided on the front panel:

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local/remote control selection

closing/tripping

autoreclose in/out (one trip to lockout)

protection engaged/disengaged

earth fault in/out

sensitive earth fault in/out

relay status

Local status indications shall be included in addition to the above control functions.

The control unit shall also have facilities for remote control/indication.

20. PROTECTION REQUIREMENTS

Relay characteristics settings shall preferably be performed on the front panel as well

as selection of the operating sequence.

Dead times and reclaim time shall be selectable in steps.

The protection system shall have facilities for: phase faults, earth faults and sensitive

earth fault.

The phase and earth fault protection shall have standard inverse IDMTL

characteristics and definite time. The trip setting range for phase faults shall minimum

cover 20 to 800 A while for earth faults 10 to 400 A.

The sensitive earth fault relay shall be of the definite time type with instantaneous

element, adjustable between 2 and 10A in steps. Time delay should be settable

between 0 and 20 sees, in steps.

The relays shall be equipped with in rush restraint facilities. A counter is to be

provided to keep record of the number of in/out operations.

P a g e | 72

21. INSULATING AND INTERRUPTING MEDIUM

The interrupting medium shall be SF6. The insulating medium shall be SF6. The SF6

gas used shall comply with IEC publication 60376.

In addition to the quantity of gas required to fill the supplied equipment, 20% shall be

supplied as spare.

The supplier shall provide the user with necessary instructions for refilling the gas and

maintaining its required quantity and quality. The autorecloser shall have facilities for

lockout in case of low pressure with an associated indicator flag easily seen from the

ground. A pressure gauge easily read from the ground shall also be provided.

Reclosers using oil as interrupting medium are not acceptable and will be rejected.

Where gas filled reclosers are offered the supplier shall include in the quotation the

cost of one set of gas filling equipment. One set of gas filling equipment shall be

supplied with the reclosers.

22. RATINGS

36 kV

a) The reclosers will be used on networks with nominal operating voltages of 33

kV. The maximum system voltage will be 36 kV. The rated one minute power

frequency withstand voltage shall be at least 70 kV when contacts are opened

with Basic Insulation Level at least 170 kV.

b) The continuous current rating shall be at least 400 A. The short time 3 seconds

current rating shall be at least 8 kA. The interrupting current shall be at least 8

kA. The closing and latching capability shall be at least 20 kA.

24 kV

a) The reclosers will be used on networks with nominal operating voltages of 22

P a g e | 73

kV. The maximum system voltage will be 24 kV. The rated one minute power

frequency withstand voltage shall be at least 50 kV when contacts are opened

with Basic Insulation Level at least 125 kV.

b) The continuous current rating shall be at least 400 A. The short time 3 seconds

current rating shall be at least 8 kA. The interrupting current shall be at least 8

kA. The closing and latching capability shall be at least 20 kA

23. BUSHING CURRENT TRANSFORMERS

The bushing current transformers for protection shall be single core. They shall be

rated as follows:

As technical specification table

If current transformers are used to provide power supply to control, protection and

tripping these are to be dimensioned with 30% spare capacity. The cores for this

supply shall be separate from the protection core.

P a g e | 74

OVERHEAD LINE INSULATORS

24. GENERAL

Pin, post and reel type insulators shall be brown glazed porcelain or epoxy resin and

shall comply with the requirements of adequate IEC publications.

Tension insulators shall be either of strings of toughened glass disc insulators or

comprise epoxy resin long rod type units. The design of insulators and fittings shall

be such as to avoid local corona formation and no significant radio interference shall

be exhibited. The insulator units and the complete insulator sets shall conform to the

electrical and mechanical design criteria given in General Technical Specification of

this Specification.

25. PIN INSULATORS FOR OVER HEAD LINES

Pin type insulators for use on 33, 22 and 11 kV lines shall have as a minimum the

electrical characteristics required in Section 2 of this Specification and they shall be

fitted with galvanized mild steel spindles having a minimum failing load of 10kN.

Spindles for pilot insulators must have a minimum failing load of 700N. Conductor

sizes to be accommodated shall vary from 6.0mm to 19.0mm diameters with

Preformed Distribution Ties.

26. TENSION INSULATORS

Tension insulator sets shall be either made up of strings of toughened glass disc

insulators of 254mm diameter and fixing centres at 140mm of 16mm ball and socket

couplings, or of epoxy resin long rod type insulators of equivalent electrical and

mechanical performance.

Complete tension insulator sets, including fittings, shall have a minimum withstand

factor of 2.5 based upon the ultimate mechanical strength.

P a g e | 75

The ultimate mechanical strength of an insulator set shall be the load at which any part

of the insulator string fails to perform its function of providing a mechanical support

without regard to electrical failure.

Individual insulator units shall have a minimum safty factor of 2.5 based upon the

combined electro-mechanical strength of the insulator unit. This is defined as that load

at which any part of the insulator fails to perform its function either electrically or

mechanically when voltage and mechanical stresses are applied simultaneously.

27. MARKING OF INSULATORS

Each insulator shall have marked upon it the manufacturer's name or trade mark, the

date of manufacture or firing, and indication of the guaranteed electro-mechanical

strength and other such marks as may be required to denote each batch for the purpose

of sample tests. Unless otherwise approved the insulators submitted, as a batch for a

test shall bear the same marks.

These marks shall be imprinted and not impressed. For porcelain, the marks shall be

imprinted before glazing. When a batch of insulators bearing a certain identification

mark has been rejected no further insulators bearing this mark shall be submitted and

the Supplier shall satisfy the Engineer that adequate steps will be taken to mark or

segregate the insulators constituting the rejected batch in such a way that there shall

be no possibility of the insulators being resubmitted for test or supplied for the use of

the Purchaser.

28. PORCELAIN INSULATORS

All porcelain shall be sound, free from defects and thoroughly vitrified. The glaze

shall not be depended upon for insulation. The glaze shall be smooth, hard, of a

uniform shade and shall cover completely all exposed parts of the insulator. Insulators

and fittings shall be unaffected by atmospheric conditions due to weather, proximity

P a g e | 76

to the coast, fumes, ozone, acids alkalis, dust or rapid changes of air temperature

between minus 40°C and plus 75 °C under working conditions.

29. INSULATOR CAPS AND PINS

The caps of insulator units shall be of malleable cast iron or other suitable material

having the necessary strength to enable the complete unit to comply with this

Specification. The pins shall be made of steel or other suitable material of such quality

that the finished unit shall comply with this Specification.

The design of the unit shall be such that stresses due to expansion and contraction of

any part of the insulator shall not lead to deterioration.

The porcelain shall not engage directly with hard metal. Cement used in the

construction of an insulator shall not fracture by virtue of expansion, or loosen by

contraction and proper care shall be taken to locate the individual parts correctly

during cementing. The cement shall not give rise to chemical reaction with metal

fittings and its thickness shall be as uniform as possible.

30. FITTINGS

Ball and socket connections shall be provided with specially designed "W" clips,

which effectively locks the connection against accidental uncoupling without

detracting from its flexibility. The "W" clip shall be of stainless steel.

The design shall be such as to permit easy removal for replacement of insulator units

under live line conditions without the necessity of removing the entire string from the

crossarm. All split pins for securing the attachment of fittings of insulator sets shall be

of stainless steel and shall be backed by washers. Plated split pins shall not be used.

P a g e | 77

31. FERROUS METAL PARTS

All ferrous metal parts except those of stainless steel shall be hot dipped galvanized to

give an average coating of zinc equivalent to 610 g per sq meter.

DISTRIBUTION TRANSFORMERS

32. GENERAL

This specification covers the manufacture; testing, supply and delivery of distribution

transformers and spares.

33. GENERAL DESIGN

The transformers shall be of the mineral oil immersed core suitable for outdoor as well

as indoor use with Oil Natural Air Natural (ONAN) cooling.

The transformers shall be designed to deliver full rated power continuously on any

tapping within the specified tapping range under the following conditions:

i) With the voltage of the untapped winding at rated value, without the need to

de-rate the transformer at the extreme tap positions and without exceeding

IEC temperature limits.

ii) Shall withstand up to 10% over-voltage With voltage without injurious

overheating

iii) Regarding loading, the transformers shall be designed in accordance with

IEC 60076-7

The transformers shall be connected in accordance with IEC 60076: three phase

transformers to Vector Group reference Dyn 11.

The L. V. neutral shall be brought out of the tank to a readily accessible terminal and

shall not be earthed inside the tank, unless otherwise specified in the enquiry.

The transformers on a particular contract with similar voltage ratios and connections

P a g e | 78

shall be suitable for parallel operations on all relevant taps under which conditions

they should share the load in proportion to their ratings subject to the tolerances on

impedance laid down in IEC 60076.

Low impedance transformer are preferred, a maximum of 6% being envisaged on any

size with no plus tolerance.

Earth studs are required at both the H.V. and the L.V. ends of transformer.

34. WINDINGS

Tappings shall be provided in the H.V. windings, preferably in the electrical center of

the windings, to permit variation of the number of H.V. turns without significant

variation in the kVA rating. The variations shall be effected by means of a manually

operated tapping switch to be provided.

All windings and terminations shall be fully insulated and those for service above 1000

volts shall be designed for impulse voltage tests.

Designs shall be such that electrical stresses are as uniform as possible throughout the

windings under impulse conditions.

Windings shall be vacuum impregnated and insulating materials shall not be liable to

soften, shrink, become brittle, carbonize, deteriorate, or collapse in any way during

service.

35. CORES

The magnetic circuit shall be earthed to the core clamping structure, at one point only,

and the core assembly to the tank. Where transformers are not sealed, readily

accessible removable bolted links shall be employed for the earthing connections.

The general construction of the cores, framework and the clamping arrangements shall

be robust and such that they will be capable of withstanding completely any stresses

which may occur due to handling, transport or service. All cores and yokes shall be

P a g e | 79

terminated and clamped by means of a suitable framework. Suitable means shall be

provided for lifting the cores from the tanks.

It shall not be possible for the core to move relative to the tank during handling or

transport.

Particular attention shall be paid to maintaining low core loss consistent with sound

design using low loss grain oriented steel of best quality.

36. TAPPING SWITCHES

The transformer shall be provided with approved off-circuit type tap changing

equipment. A fully insulated off-circuit, externally manually operated ganged tapping

switch shall be supplied, capable of withstanding the specified impulse voltage when

connected to the transformer windings.

Clearly visible tap position indication shall be provided. The tapping switch shall be

operated by means of an external handle that can be positively located and locked in

each operating position.

The switch shall be mechanically robust and provided with a device between the

handle and the switch to permit operation without strain in the event of imperfect

alignment between switch and handle; the switch operating shaft shall be fully

insulated as between tank and switch and shall be provided with a suitable oil and

vacuum tight gland where it passes through the tank.

The use of wood shall be avoided wherever possible and all the supports and terminal

boards shall be completely unaffected by hot oil and non-moisture absorbent.

High grade insulating materials shall be used in the construction of tapping switches

which shall be designed with special attention to the elimination of points where

tracking is likely to occur.

Tapping switches shall be mounted on supports made of suitable high strength

insulating material and shall be provided with self-aligning spring loaded wiping

P a g e | 80

contacts capable of maintaining good electrical contact without the need for periodic

maintenance.

All clearances between tapping switch contacts and leads shall be indicated on

drawings submitted at the time of tendering and such clearances shall be sufficient to

prevent tracking or flashover in the event of carbon or sludge deposits forming on

leakage paths.

H.V. tappings: Minus 7.5% : Minus 5% : Minus 2,5% : 0% : plus 2.5% : Plus 5% : Plus

7.5%.

37. BUSHINGS

All line terminals and neutral connections where specified, shall be brought out to

porcelain outdoor type terminal bushings located on the top cover. Arcing horns shall

be fitted on all transformer bushings above 660 volt. The arcing horn flash over

distances shall be adjustable and set to 60-70 mm for 11 kV, 75-85 mm for 22kV and

130-140 mm for 33kV phase to phase voltages.

The LV Busbar shall be capable to carry 1250 A with 4 holes per phase for the 630

KVA transformers and in accordance with the attached drawing.

38. TANKS AND CONSERVATORS

General

Drain valves may be either screwed or flanged whilst conservator isolating valves shall

be flanged. Drain valves shall be complete with captive plugs that shall be either of

non-ferrous metal or galvanised.

All internal steel surfaces or tanks and conservators shall be shot blasted and cleaned,

and a coat of protecting compound, unaffected by hot oil, should be applied.

All external surfaces and parts made of steel are to be thoroughly shot blasted and

cleaned, after which two coats of priming paint, preferably of zinc chromate, one

intermediate coat and one coat of finishing paint are to be applied. The purchaser shall

approve the colour.

P a g e | 81

Transformers on which the paints are found to flake off or deteriorate within the

guaranteed period shall be suitably cleaned and repainted free of charge by the

supplier.

Tanks

Each transformer shall be housed in a tank of welded steel plate construction suitably

stiffened where necessary but with a flat base. Wheels or rollers are not required.

Each tank shall be provided with the accessories specified Table 1, the lifting lugs

called for shall be suitable for lifting the transformer bodily by means of a hoist or

crane when it is completely assembled and ready for service.

All transformers shall be provided with skid on the base.

No radiators or tube coolers shall be used. Ribbed tanks may be supplied in order to

achieve the necessary cooling under the conditions prevailing at site.

Conservators

Conservators shall be of dimensions such that oil expansion may occur over the

working range temperature from no load with the transformer cold at minus 10ºC

ambient air temperature to full load at plus 45ºC ambient air temperature while the

sump pipe remains covered and the oil level is visible or indicated.

The fittings detailed in Table 1, shall be provided on all transformer conservators.

Drain plugs shall preferably incorporate approved sampling facilities, and shall be

mounted at the lowest part of the conservator tank and so designed that the sampling

device can be readily cleared in the event of its being blocked by an accumulation of

sludge etc., without the necessity of having to dismantle the device completely.

Oil level gauges on conservator tanks shall be of the refracting plate glass or other

approved type, marked with the level at 20oC at no-load and capable of indicating the

level of oil over the specified working range.

Where dehydrating breathers are specified they shall be of the Silica gel type, which

give indication of moisture absorption by change in colour of the charge. The Silica

P a g e | 82

Gel housing shall be of the type, which provides full visibility for inspection of the

silica gel and shall be mounted in a position convenient for inspection and replacement

of the silica gel. The breather is to incorporate an oil seal to prevent contact with the

external air when breathing is not taking place. The breather to be fitted on the L.V.

end of the transformer.

Where only a vent pipe without a breather and incorporating a filling hole is specified,

it shall preferably be fitted with a cap and provided with very fine mesh non-corrodible

anti-vermin gauze.

39. ACCESSORIES AND FITTINGS

All transformers shall be provided with accessories and fittings in accordance with

Table 1, unless otherwise specified in the enquiry.

Rating and diagram plates shall be of engraved steel, brass or other approved non-

corrodible material.

Where a thermometer pocket is provided, it shall be of a thin walled metal mounted in

the tank cover.

The pocket shall project 25mm outside of the tank and shall be threaded along the

whole projecting portion, a screwed cap shall be provided to cover the pocket when

not in use.

P a g e | 83

Table 1: Accessories and Fittings for Distribution Transformers (Breathing Type).

Item Number 630 kVA

Transformer Tank Fittings units

1. Conservator Y

2. Safety Valve ( over pressure relief device ) Y

3. Drain valve with captive sealing plug Y

4. Lifting lugs Y

5. Thermometer Pocket Y

6. Rating and diagram plate Y

7. Platform mounting lugs Y

8. Earthing Terminal Y

9. Lightning arrester brackets (Arcing Horn ) Y

10. Thermometer pocket Y

11. Jacking pads required only when the mass of the

complete transformer is 1000 kg or more.

Y

12. Oil gauge ( Level Indicator ) Y

13. Mounting plate Y

14. Oil filling opening Y

15. Dehydrating breather ( Silica Gel breather) Y

16. Drain plug Y

17. Base (SKID) Y

18. Lashing down facilities Y

19. Separate filling hole with cap. Y

40. SURFACE TREATMENT AND PAINTING

Transformer and all metal parts shall be protected by one primary and two finishing

coats of appropriate paint prior to delivery. The finishing coat shall be of aluminum

colour subject to the Employer Approval.

The interior of the tank and the oil conservator shall be painted with two coats of

varnish.

Internal surface treatment of transformer and expansion tank:

Degreased, sandblasted cleaned by pressurized air and painted by varnish not

contributing to releasing of gas from the oil.

P a g e | 84

41. INSULATING OIL

The transformer shall be filled with low viscosity mineral insulating oil, which

complies in every respect with the provision of IEC 60296.

42. TESTS

A) Routine Tests

All transformers shall be subjected to the following Routine tests in accordance

with IEC 60076:

1- Measurement of winding resistance.

2- Ratio, Polarity and phase relationships.

3- Impedance voltage.

4- Load loss

5- No load loss and no load current.

6- Induced over voltage withstand

7- Separate source voltage withstand.

8- Insulation resistance.

9- Temperature-rise test.

The test shall carry out in presence of two engineers from PETL Co.

B) Type Tests

The Tenderer should submit with his offer complete Type test certificates including

shortcircuit tests, according to IEC standard from an independent & international

recognized testing laboratory such as KEMA , CESI for Transformers as an evidence

of his capability to manufacturer such materials.

The supplier shall perform a complete Type test on one transformer of size 630 KVA

of the transformers to be delivered under this contract. The type test including short-

P a g e | 85

circuit tests shall be conducted according to IEC standard from an independent &

international recognized testing laboratory such as KEMA, CESI. The test shall carry

out in presence of two engineers from PETL Co.

Temperature-rise test: The test shall be in accordance with IEC.60076-2 and shall be

carried out on one transformer of each size and type.

Temperature-rise test shall be conducted on the tapping corresponding to the

maximum losses.

As a special test, an impulse voltage withstands test including chopped waves on each

different rating of transformer.


43. PACKING AND TRANSPORT

Transformer shall be transported to destination with their tanks full of oil up to the

service level.

Bushings and any accessories or fittings likely to be damaged shall be protected

adequately against damage in transit.

44. DRAWINGS AND DIAGRAMS

With Bid

The following drawing shall be supplied with the bid.

General arrangement drawing of each rating of transformer offered showing:

i) Minimum clearance (phase to phase and phase to earth) on H. V. and L.V.

P a g e | 86

bushings including clearance H.V. to L.V.

ii) Positions and identification in a separate legend of all fittings with type

numbers.

iii) Size and position of all fixing holes.

iv) Total weights with and without oil and core lifting height and weight.

Detail dimensioned drawings of tapping switch illustrating type of material,

clearances, between tapping points and to earth and method of operation.

Detailed dimensioned drawing of bushings, silica gel or plain oil seal type

breather, and conservator.

Note: Where sealed transformers are offered, a cross arrangement drawing shall

be submitted with the tender showing, in particular, details of the tank

construction and internal tank finish and the depth of the expansion space above

the oil.

With Contract

Latest issues of the drawing shall be supplied under the contract; if no

modifications are applicable to the drawings supplied with the tender, this shall

be confirmed in writing under the contract and further drawings need not be

supplied.

Rating and diagram plate drawing shall be supplied.

TESTS

45. GENERAL REQUIREMENT

As provided in the Conditions of Contract, the whole of the materials used in the

contract shall be subject to such inspection and test at the manufacturer's works as the

Purchaser may direct from time to time as the work proceeds. The cost of such

P a g e | 87

inspection and tests, including the provision and use of test equipment, shall be

included in the Contract.

Not less than three weeks notice of all tests shall be given to the Purchaser in order

that he may be present if he so desires. As many tests as in the opinion of the Purchaser

are possible shall be arranged together. Three copies of the Supplier's records of all

tests shall be furnished to the Purchaser.

The approval by the Purchaser of the results of such inspection and tests shall not

relieve the Supplier of his obligations under the Contract for the satisfactory

performance of the goods and materials.

If, due to the Contract Works and/or component materials not complying with this

specification, further tests are necessary, the Supplier shall pay all additional costs

which may be incurred in re-testing.

During the execution of the Contract, test specimens, if required by the Purchaser shall

be taken from the materials for the purpose of check tests or analyses by Independent

Authorities. Such specimens shall be prepared for testing and forwarded at the

expense of the Supplier to the Testing Authorities selected by the Purchaser.

The Purchaser reserves the rights to call for further tests which are in his opinion

necessary to confirm satisfactory performance. Tests shall as far as possible simulates

site conditions.

The Supplier shall submit certified type test certificates for all equipment covering the

type tests detailed in this section. Evidence to this effect shall be submitted at the time

of bidding.

P a g e | 88

Type tests will normally only be required when certified test certificates are not

available for identical equipment.

Routine tests will be required on all equipment as described in this Section. High

voltage tests shall be to IEC 60060 unless otherwise indicated.

Except where otherwise indicated all electrical tests shall be carried out at rated

frequency with an approximately sinusoidal waveform.

All instruments shall be approved by the Purchaser and if required shall be calibrated

at the Supplier's expense.

Lightning Arresters

Type and Routine tests shall be in accordance with IEC 99-4.

Drop-out Fuse Switch & Switch Disconnector

Type and routine sample tests to IEC 60129 shall be carried out.

STAY WIRE

The stay wires shall be hot dip zinc-coated and manufactured from steel. They shall be

in accordance with internationally recognized Standard. Such information shall be

submitted with the Bid.

The wire shall have the following dimensions and strength:

Nominal area 52 mm2

P a g e | 89

Calculated approximate diameter 9.2 mm

Rated breaking strength 70 kN

Number of strands 19

46. STAY WIRE ACCESSORIES

The following accessories shall be delivered, as specified in the price schedules.

Stay wire tension adjusting device, of the U-bolt type, complete sets with necessary

nuts and fittings.

Stay wire attachment devices for attachment to wood or steel pole. The attachment

may be preformed grip or clamp type. The device shall be as complete sets suitable

for the specified stay wire and its rated strength.

Suitable and matching stay wire anchors for soil and rock shall be supplied as per

price schedules.

P a g e | 90

IV. Technical Schedules – LOT1

P a g e | 91

A1: Switch-Disconnecters 36 kV with load breaking head, 3-phase, complete. For top and side

mounting

Nº Description Unit Required Offered

specifications

1 Rated Voltage 36

2 Maximum Service Voltage kV 38

3 Rated Frequency Hz 50

4 Rated continuous current by 45 oC

ambient temperature A 630

5 Breaking Capacity kA 25

6 Rated shortcircuit current 1 sec. kA 25

7 Impulse withstand voltage

(a) To earth kV 170

(b) Across the isolating distance kV 195

8 Maximum temperature rise over current

carrying parts oC 90

9 Creepage distance across insulator mm 900

10 Maximum bending torque at base of

support insulator kN 4

11

Equipped with Top horizontal to be

installed on lattice pole arm (K2231,

K2233, K2234) as bellow picture

Yes/No Yes

12 3 separate, single pole Yes/No Yes

P a g e | 92

A2: SF6 pole mounted Motorized Switch-Disconnectors 36kV with load breaking head, 3-phase,

complete with all protection, control unit (Manuel and auto- operation with interlocked) and Ability

for SCADA application (top and side mounting). With monitor display appear (Volts, Amps, Type of

fault, etc..)


specifications

1 Rated Voltage 36

2 Maximum Service Voltage kV 38


4 Rated continuous current by 45 oC

ambient temperature A 630

5 Breaking Capacity kA 25

6 Rated shortcircuit current 1 sec. kA 25

7 Impulse withstand voltage

(a) To earth kV 170

(b) Across the isolating distance kV 195

8 Maximum temperature rise over current

carrying parts oC 90

9 Creepage distance across insulator mm 900

10 Maximum bending torque at base of

support insulator kN 4

11 Equipped with Top and side mounting

accessories Yes/No Yes

12 3 separate, single pole Yes/No Yes

13 Operation time 1 S Yes/No Yes

P a g e | 93

14 Enclosure in ASI 304 stainless steel

Yes/No Yes

15 Manual or motorized operating mechanism

Yes/No Yes

16 IEC 62271-200 compliant

Yes/No Yes

P a g e | 94

A3: 36kV Autorecloser with relevant set of MV C.T&PT tank type transformers (with CT rating of 20-

40/5A). Ability for SCADA application


specifications

1 Manufacturer

2 Design

The autorecloser shall be

designed for pole

mounting

3 Modes of operation

Autoreclosers shall be

equipped to provide three

phase trippings and

reclosures

4 Operating Mechanism

The closing mechanism

shall be solenoid operated

whereby the solenoid

during closing charges a

spring which drives the

tripping mechanism

5 Power Supply

The recloser shall

preferably be completely

self contained deriving all

its energy from the

feeding side of the HV

network

6 Batteries

90 V Lithum battery with

minimum battery life span

of 10 years

7 Control Cabinet

separate control cabinet

shall be provided either

mounted on the recloser

tank or connected to the

recloser by means of 10

meter multicore cable

P a g e | 95

8 Control functions

-local/remote control

selection

-closing/tripping

-autoreclose in/out (one

trip to lockout)

-protection

engaged/disengaged

-earth fault in/out

-sensitive earth fault

in/out

-relay status.

9 Protection Requirements

The protection system

shall have facilities for:

-phase faults

-earth faults


10 Trip setting

The trip setting range for

phase faults shall

minimum cover 20 to 800

A while for earth faults 10

to 400 A

11 Insulating and Interrupting

Medium

The interrupting medium

shall be SF6. The

insulating medium shall be

SF6. The SF6 gas used

shall comply with IEC

publication 376.

12 Ratings

13 Nominal operating voltages kV 33

14 Maximum system voltage kV 36

15 One minute power frequency

withstand voltage kV 70

P a g e | 96

16 Basic Insulation Level kV 170

17 continuous current rating A 400

18 The short time 3 seconds

current rating kA 8

19 The interrupting current kA 8

20 closing and latching capabil kA 20

21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be single

core

CT Ratings

- Ratio is set at 20-40/5

A

- 20-40/1 A CT for

Thermal Relay

Protection

- Burden - at least 5 VA

(minimum 20% spare

capacity)

- Class - 10P10

P a g e | 97


100/5A). Ability for SCADA application


specifications

1 Manufacturer

2 Design

The autorecloser shall

be designed for pole

mounting



equipped to provide

three phase trippings

and reclosures



shall be solenoid

operated whereby the

solenoid during closing

charges a spring which

drives the tripping

mechanism

5 Power Supply

The recloser shall

preferably be

completely self

contained deriving all

its energy from the


network

6 Batteries

90 V Lithum battery

with minimum battery

life span of 10 years

7 Control Cabinet



mounted on the

recloser tank or

P a g e | 98

connected to the



8 Control functions


selection

-closing/tripping


trip to lockout)

-protection

engaged/disengaged

-earth fault in/out


in/out

-relay status.




-phase faults

-earth faults


10 Trip setting

The trip setting range

for phase faults shall

minimum cover 20 to

800 A while for earth

faults 10 to 400 A

11 Insulating and

Interrupting Medium

The interrupting

medium shall be SF6.

The insulating medium

shall be SF6. The SF6

gas used shall comply

P a g e | 99

with IEC publication

376.

12 Ratings

13 Nominal operating

voltages kV 33


15

One minute power

frequency withstand

voltage

kV 70




current rating KA 8

19 The interrupting current KA 8

20 closing and latching

capabil KA 20

21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be

single core

CT Ratings

- Ratio is set at 50-100/5 A

- 10-100/1 A CT for Thermal Relay

Protection - Burden - at least 5

VA (minimum 20%

spare capacity) - Class - 10P10

P a g e | 100


200/5A)


specifications

1 Manufacturer

2 Design The autorecloser shall be

designed for pole mounting



equipped to provide three

phase trippings and

reclosures



shall be solenoid operated

whereby the solenoid

during closing charges a

spring which drives the

tripping mechanism

5 Power Supply

The recloser shall


self contained deriving all

its energy from the feeding

side of the HV network

6 batteries


minimum battery life span

of 10 years

7 Control Cabinet







8 control functions -local/remote control

selection

-closing/tripping

P a g e | 101


trip to lockout)

-protection

engaged/disengaged

-earth fault in/out

-sensitive earth fault in/out

-relay status.


The protection system shall

have facilities for:

-phase faults

-earth faults


10 trip setting


phase faults shall minimum

cover 20 to 800 A while for

earth faults 10 to 400 A


Medium


shall be SF6. The insulating

medium shall be SF6. The

SF6 gas used shall comply

with IEC publication 376.

12 Ratings



15 One minute power frequency

withstand voltage kV 70




current rating KA 8

P a g e | 102


20 closing and latching capabil KA 20

21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be single

core

CT Ratings

- Ratio is set at 100-

200/5 A

- 100-200/1 A CT for

Thermal Relay

Protection

- Burden - at least 5 VA

(minimum 20% spare

capacity)

- Class - 10P10

P a g e | 103

A6: 36kV pole mounted Autorecloser with relevant set of MV C.T&PT tank type transformers (with

CT rating of 200-400/5A). Ability for SCADA application


specifications

1 Manufacturer

2 Design


designed for pole

mounting



equipped to provide


and reclosures



shall be solenoid




drives the tripping

mechanism

5 Power Supply

The recloser shall


self contained deriving

all its energy from the


network

6 batteries


minimum battery life

span of 10 years

7 Control Cabinet





P a g e | 104



8 control functions


selection

-closing/tripping


trip to lockout)

-protection

engaged/disengaged

-earth fault in/out


in/out

-relay status.




-phase faults

-earth faults


10 trip setting


phase faults shall

minimum cover 20 to


faults 10 to 400 A


Medium


shall be SF6. The

insulating medium shall

be SF6. The SF6 gas

used shall comply with

IEC publication 376.

P a g e | 105

12 Ratings



15 One minute power

frequency withstand

voltage

kV 70




current rating KA 8



21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be

single core

CT Ratings

- Ratio is set at 200-

400/5 A - 200-400/1 A CT for

Thermal Relay Protection

- Burden - at least 5

VA (minimum 20% spare capacity)

- Class - 10P10

P a g e | 106




specifications

1 Manufacturer

2 Design

The autorecloser shall

be designed for pole

mounting



equipped to provide


and reclosures



shall be solenoid




drives the tripping

mechanism

5 Power Supply

The recloser shall

preferably be

completely self

contained deriving all

its energy from the


network

6 Batteries

90 V Lithum battery

with minimum battery

life span of 10 years

7 Control Cabinet



mounted on the

recloser tank or

P a g e | 107

connected to the



8 Control functions


selection

-closing/tripping


trip to lockout)

-protection

engaged/disengaged

-earth fault in/out


in/out

-relay status.




-phase faults

-earth faults


10 Trip setting

The trip setting range

for phase faults shall

minimum cover 20 to


faults 10 to 400 A

11 Insulating and

Interrupting Medium

The interrupting

medium shall be SF6.

The insulating medium

shall be SF6. The SF6

gas used shall comply

P a g e | 108

with IEC publication

376.

12 Ratings

13 Nominal operating

voltages kV 22


15 One minute power

frequency withstand

voltage

kV 50




current rating KA 8


20 closing and latching

capabil KA 20

21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be

single core

CT Ratings


- 40-50/1 A CT for Thermal Relay

Protection - Burden - at least 5

VA (minimum 20%


P a g e | 109




specifications

1 Manufacturer

2 Design


designed for pole

mounting



equipped to provide


and reclosures



shall be solenoid




drives the tripping

mechanism

5 Power Supply

The recloser shall





network

6 batteries



span of 10 years

7 Control Cabinet





P a g e | 110



8 control functions


selection

-closing/tripping


trip to lockout)

-protection

engaged/disengaged

-earth fault in/out


in/out

-relay status.




-phase faults

-earth faults


10 trip setting


phase faults shall

minimum cover 20 to


faults 10 to 400 A


Medium


shall be SF6. The


be SF6. The SF6 gas



P a g e | 111

12 Ratings



15 One minute power

frequency withstand

voltage

kV 50




current rating KA 8



21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be

single core

CT Ratings


- 100-200/1 A CT for Thermal Relay Protection

- Burden - at least 5 VA (minimum 20%


P a g e | 112




specifications

1 Manufacturer

2 Design


designed for pole

mounting



equipped to provide


and reclosures



shall be solenoid




drives the tripping

mechanism

5 Power Supply

The recloser shall





network

6 batteries



span of 10 years

7 Control Cabinet





P a g e | 113



8 control functions


selection

-closing/tripping


trip to lockout)

-protection

engaged/disengaged

-earth fault in/out


in/out

-relay status.




-phase faults

-earth faults


10 trip setting


phase faults shall

minimum cover 20 to


faults 10 to 400 A


Medium


shall be SF6. The


be SF6. The SF6 gas



P a g e | 114

12 Ratings



15 One minute power

frequency withstand

voltage

kV 50




current rating kA 8

19 The interrupting current kA 8

20 closing and latching capabil kA 20

21 Bushing Current

Transformers

The bushing current

transformers for

protection shall be

single core

CT Ratings


- 300-600/1 A CT for

Thermal Relay Protection

- Burden - at least 5 VA (minimum 20% spare capacity)

- Class - 10P10

P a g e | 115

A10: Metering Unit pole mounted MV measuring 33kV (KW/h, KVAR, etc..) Class 0.2; With CT and

VT, Ability for SCADA application, with protection fuse

The meter must be microprocessor based numeric type and perform the measurements of

electrical quantities such as kWh; kVARh ; kVA; maximum demand; A ; V …etc ( three phase

and single phase).

The unit must be equipped with GSM-GPRS modem, optical port and communication ports.

Software for setting and operation of the meter is requested.


specifications

1 Nominal voltage kV 3*64/110V up to

3*240/415V

2 CT,VT Connection 4-wire connection

3 Frequency Hz 50Hz

4 rating current A 5A

5 Accuracy 0.2

6 Temperature range C -30C° to +75 C°

7 Surge voltage withstand kV 36 kV

8 Communications

Serial port

Electrical ports

Optical port

Modbus

RS232 or RS485

According to (IEC 62056-

21)

P a g e | 116

A11: Metering Unit pole mounted MV measuring 22kV (KW/h KVAR, etc.) Class 0.2; With CT and VT,

Ability for SCADA application, with protection fuse

The meter must be microprocessor based numeric type and perform the measurements of

electrical quantities such as kWh; kVARh ; kVA; maximum demand; A ; V …etc ( three phase

and single phase).

The unit must be equipped with GSM-GPRS modem, optical port and communication ports.

Software for setting and operation of the meter is requested.


specifications

1 Nominal voltage kV 3*64/110V up to

3*240/415V

2 CT,VT Connection 4-wire connection

3 Frequency Hz 50Hz

4 rating current A 5A

5 Accuracy 0.2

6 Temperature range C -30C° to +75 C°

7 Surge voltage withstand kV 24 kV

8 Communications

Serial port

Electrical ports

Optical port

Modbus

RS232 or RS485

According to (IEC 62056-

21)

P a g e | 117

A12: 3 Phase 36kV electronic sectionalizer, Nominal current: Actuating current Resettable 6 - 215 A,

Types of inrush currents detected Symmetric and asymmetric, Inrush detection time < 1 cycle


specifications

1 Nominal system voltage kV 33

2 Max. Operating voltage kV 36

3 Frequency HZ 50

4 USE - OUT DOOR

5 Insulating

Support

Currents

Max. rated A 300

Short time current

1s(effective

kA 4

Asymmetrical initial

(peak

kA 10

6 Sectionalizing

link current

Max.rated A 800

Short time current

1s(effective

kA 4

Asymmetrical initial

(peak

kA 10

7 Actuating current A

8 Selection way for current actuating ---- Manually

adjustable

9 times Dead line detection Sec.

Min.

<0,100

Counting memory ≥3

P a g e | 118

Memory reset Sec.

Sec.

25-35

Short circuit detection ≤0,04

10

Impulse withstand voltage (1.2*50 ms)

(a)To earth & between phase

kV

170

11 Number of counts before operation Manually

adjustable

between

1,2,3,4

12 Communication interface ( GSM ,SCADA

)future ability

yes

13 External needed materials ( if required

for operation)

No/

yes

yes

P a g e | 119

A13: 33kV Fault Indicator (visual)

Table of contents:

1. General

……………………………………………………………….....................................

91

1.1

Scope…………………………………………………………………………………………

91

1.2 Quality

Insurance……………………………………………………………….....................

91

2. Wireless communication Fault detection

systems………………………………….............

91

2.1 General information

…………………………………………………………………............

91

2.2 Operational

specifications……………………………………………………........................

94

2.3 Additional requirements…………….

………………………………………………............

97

P a g e | 120

1. 1. General

1.1 Scope

This specification applies to a system allowing to remotely monitor appearance of faults on an Overhead

Medium Voltage network so that to localise faulty sections and send patrols for reconfiguration of the

network accordingly.

The system shall be made of:

- Fault detection systems with wireless communication to be installed on Medium Voltage Overhead Electric

networks, as specified in this document,

- A piece of software to be installed on a PC in the control centre so that to display the information from

these Fault passage indicators. This shall be referred to as a Fault Monitoring software. THIS IS NOT

SPECIFIED IN THIS DOCUMENT.

1.2 Quality Insurance

The Bidder shall supply documentary proof that the manufacturer possesses ISO 9001 and ISO 14001

Quality insurance certification, from an independent internationally recognized body, for the design,

manufacture and testing of Fault Indicators and remote monitoring and control equipment for medium

voltage lines

2. 2. Wireless communication Fault detection systems


2.1.1 System parameters

The Fault detection systems shall be designed to operate on a Medium Voltage overhead network with the

following characteristics:

- Nominal Operation Voltage 4 to 69 kV

- System Maximum Voltage 69 kV

- Frequency 50 Hz (or 60Hz)

- Type of MV neutral earthing through a resistor or solidly grounded

- Conductor diameter 5 to 22 mm

One single product shall be proposed to cover the whole range of above characteristics: Particularly, the

same product should be installed on any network from 4 to 69 kV. Offers requiring to have in stock 2 or

more different product references depending on the Line Voltage or on the conductor diameter shall not be

considered.

P a g e | 121

2.1.2 Service conditions

The Fault detection system shall be designed to operate in the following environmental conditions:

Symmetrical Fault Current 12.5 kA/1s and 25kA/170ms (maximum phase current

that the system shall withstand)

Shocks & vibrations 120 minutes of sine vibrations and 2000 negative and

2000 positive shocks, in OX, OY and OZ axes

Lightning surge 125kV shocks

Maximum Ambient Temperature 55° C

Maximum annual average

temperature

25° C

Humidity At least 95% during at least 2 24 hours cycles with

temperature up to +55°C according to IEC 68 2 30

2.1.3 Purpose of equipment

The main functions of the equipment are:

-To detect phase-to-phase and phase-to-earth fault currents on the MV network.

-To detect voltage presence interruptions.

-To time stamp faults and Voltage dips and store them in memory

-To transmit information to the control centre spontaneously via the GSM/GPRS network.

-To provide a local light indication of fault.

-To measure load current on the line.

-To provide operators with all useful information for fault finding and preventive maintenance.

-To be self-supplied at all times, including during outages.

2.1.4 Constitution

2.1.4.1 Components

The equipment shall be made of the following parts:

-Fault Passage Indicators clipped on the overhead lines. One such device shall be clipped on each phase so

that to measure current and Voltage presence in this phase and compute fault detection algorithm

accordingly. A short-range radio interface shall be embedded in this Fault Passage Indicator so that to allow

it communicate with the GSM/GPRS communication interface mentioned below.

-A GSM/GPRS communication interface, pole-mounted, acting as a communication gateway between Fault

Passage Indicators using short-range radio and the remote control centre using GSM/GPRS communication.

-A solar supply kit, made of a solar panel and a rechargeable battery, mounted on the same pole,

appropriately dimensioned to continuously supply the GSM/GPRS communication interface considering the

average sun radiation in the country.

2.1.4.2 GSM/GPRS communication interface

The GSM/GPRS communication interface shall be designed to be mounted on a wooden, concrete or

metallic pole. It shall be able to interface up to 9 Fault Passage Indicators installed in a 100m maximum

range at least, corresponding to up to 3 overhead lines.

Solutions using a GSM/GPRS interface allowing to to interface only 3 or 6 Fault Passage Indicators, i.e. 1 or

2 MV lines, or within a maximum range less than 100m shall NOT be considered.

The GSM/GPRS communication interface maximum dimensions shall be 300 x 250 x 150 mm (H x L x D).

This box shall include the following functions:

P a g e | 122

- Short range radio Interface to up to 9 Fault Passage Indicators in a 100m range.

- GSM/GPRS communication to control center

- Configuration of the communication interface (GSM/GPRS communication, definition of alarms…) and

Fault Passage Indicators (Fault detection thresholds…) by connection of a laptop running the configuration

software to an RS232 interface on the communication interface. The same software shall also include full

diagnostic capabilities.

It shall be supplied by the solar panel + battery block installed above it on the same same pole. Connection

cables between GSM/GPRS communication interface and solar panel + battery block shall be provided.

2.1.4.3 Fault Passage Indicator

The Fault Passage Indicators shall be designed to be clipped on the Overhead MV line. 3 Fault Passage

Indicators shall be clipped on one line, one on each phase. It shall include the following functions:

- Measurement of current running in the phase it is clipped on

- Detection of Voltage absence/presence on the phase it is clipped on

- From the 2 previous functions, detection of phase-to-phase and phase-to-earth faults

- Short-range radio communication with a GSM/GPRS communication interface at a maximum distance of

100m at least.

It shall be self-supplied from a non-rechargeable battery of a minimum life time 8 years, in the temperature

conditions specified above, including at least 1 short range radio communication with the GSM/GPRS

communication interface every hour and 300 hours flashing for fault indication all over these 8 years.

The Fault Passage Indicators shall be suitable for outdoor use in the tropical climate condition stipulated in

the relevant paragraph. The components used in the Fault Passage Indicators shall be suitably protected from

direct sunlight to prevent malfunctioning due to solar radiation. The maximum operating temperature shall

not be less than 55° C. The Fault Passage Indicators shall be suitable for mounting on live line conductors of

a diameter ranging between 5 and 25 mm, thanks to clamps designed so that the Fault Passage Indicator can

withstand winds of 150km/h without falling from the line. The Fault Passage Indicator shall be fully self-

contained type without any external connection, indicator or sensors. The Fault Passage Indicators shall be

suitable for use on multiple lines supported by the same pole.

2.1.4.4 Solar panel supply kit

This kit shall be composed of a solar panel and rechargeable battery.It shall be provided with a cable of

minimum length 3m for connection to the GSM/GPRS communication interface installed on the same pole.

2.2 Operational specifications

2.2.1 Fault detection

Fault detection shall be performed by the Fault Passage Indicator described above. Fault sensing shall be

made from current measurement and Voltage presence detection, based on detection of the electromagnetic

field and its variations.

The Fault Passage Indicator shall be of the programmable type, suitable for sensing:

- Short-circuit faults up to 12.5 kA for 1s and 25 kA for 170ms.

- Low earth leakage faults (referred to as “unbalance”) down to 6A.

The Fault Passage Indicators shall detect faults based on 2 simultaneous tripping criterias:

P a g e | 123

- In order to detect strong fault currents (typically phase-to-phase faults), it shall trip when the phase current

exceeds an absolute threshold for a fixed duration of about 20 to 30 ms. This absolute threshold must be

configurable to at least 8 different values between 100 and 800A.

- In order to detect low fault currents (typically resistant phase-to-earth faults), it shall trip when it detects

the phase current increase within a fixed duration (about 20 to 30ms) exceeds a relative threshold. This

threshold must be configurable to at least 6 different values between 6 and 80A.

It shall be possible to disable this second tripping criteria.

When a fault occurs on the network, the upstream protection will trip within 70s maximum (inverse time

protection). Therefore, in order to prevent tripping due to a load increase, on detection of one of the above

criterias, the Fault Passage Indicators shall confirm the fault by checking if the voltage disappears within the

next 70s. and start to indicate the fault only under this condition.

In case of faults, the Fault Passage Indicators which are detecting the variation of the electromagnetic field

due to fault current (Fault Passage Indicators installed between the circuit breaker and fault point) shall

provide a fault indication, while Fault Passage Indicators downstream the fault or on non-faulty branches

shall not provide any indication.

The fault indication shall be provided:

- by the means of a flashing light system offering a good contrast against sunshine (red color is prefered) and

an MTBF of the light emitting system at least 45 000 Hours (LEDs for instance). It shall provide a light of

an intensity of 40 Lumen minimum and give a 360° visibility from at least 50m in sunny day conditions, and

at least 300m at night.

- By an alarm sent to the GSM/GPRS interface which shall itself forward the alarm to the control center

according to its configuration.

The Fault indication shall remain until:

- a time-out, configurable to at least 4 possible values between 2 and 16 hours, has expired,

- the medium voltage is back,

- the Fault Passage Indicator is reset manually,

- Whatever condition comes first.

Caution: since the load current might be very low upon MV return, load current reset is not acceptable.

The Fault indication reset shall consist in:

- stopping the local light indication flashing

- sending an alarm to the GSM/GPRS interface which shall itself forward this alarm to the control center

according to its configuration.

The Fault Passage Indicator shall include some self-test possibility usable when it is on the line (powered or

not).

The Fault Passage Indicator shall be selective in action as indicated below

- It shall not respond to any sudden variation (increases/decrease) in load current

- It shall not respond to a overcurrent not due to a fault

- It shall not respond to high magnetising inrush currents, created upon line energising.

2.2.2 Detection of voltage presence and absence

The Fault Passage Indicator shall send a message to the GSM/GPRS interface as soon as it detects

disappearance or appearance of Voltage on the MV conductor. The GSM/GPRS interface shall then

memorise the information as a time-stamped event and send an alarm to the control centre according to its

configuration.

2.2.3 Digital inputs

P a g e | 124

The GSM/GPRS interface shall allow connection of information from sensors available in the immediate

vicinity to potential-free inputs. At least 6 potential-free digital inputs shall be included in the GSM/GPRS

interface.

2.2.4 Measurements

The Fault Passage Indicator shall continuously measure the current running in the conductor on which it is

clipped and periodically send the minimum, maximum and average values measured. The GSM/GPRS

interface shall then store this information to allow reading it locally by connecting a PC or remotely from the

control centre. The sending period shall not be more than 1 hour.

2.2.5 Event time-stamping

Any change of state of information shall generate a time-stamped event stored in the GSM/GPRS interface

memory.

The event storage capacity shall be at least 100 events.

2.2.6 Short-range radio

Short range radio shall use license-free radio in the frequency bandwidth 902-928 MHz. It shall be designed

so that to allow a maximum distance between GSM/GPRS interface and the Fault Passage Indicators equal

to 100m or more.

Indicators of short range radio transmission quality shall be available and displayed by connection of a PC to

the GSM/GPRS interface.

Antennas for short-range radio communication shall be embedded in or fixed on the products (GSM/GPRS

interface and Fault Passage Indicator) so that no specific installation is required.

2.2.7 Communication with the control centre

Communication between the GSM/GPRS interface and the control centre shall be through GSM/GPRS

network, dual-band 900 MHz – 1800 MHz, and using any standard protocol.

It shall allow communication in 2 ways:

- At any time, based on configured periodic calls or on operator action, the GSM/GPRS interface shall be

ready to receive a call from the control centre

- Whenever a monitored information declared as alarming in the GSM/GPRS interface configuration

changes status, the GSM/GPRS interface shall make a call to the control centre and send it an alarm.

Each monitored information (fault current detection, voltage absence/presence, digital inputs etc…)

shall be configurable as "alarming" when changing state, individually and independently of others. If

used with GSM communication, as an addition to the alarm to the control centre, it shall be possible

to configure the GSM/GPRS interface so that it send an SMS message to a mobile phone. The

configuration software shall allow to define the mobile phone number and SMS messages service

centre number.

Monitored information configurable as “alarming” shall include at least the following, consisting both of

MV network diagnostic information and monitoring equipment internal faults for self-diagnostic purpose:

- Fault detection appearance with indication of Fault Passage Indicator reporting the fault and tripping

criteria tripped.

P a g e | 125

- Fault detection disappearance with indication of Fault Passage Indicator reporting the fault and tripping

criteria tripped.

- Voltage absence

- Voltage presence

- Change of state of a digital input

- Fault Passage Indicator absent (failure of the GSM/GPRS communication interface to communicate with it

through short range radio)

- Fault Passage Indicator battery low

2.2.8 Configuration and maintenance

Equipment configuration and diagnostic shall be performed by connection of a laptop PC to the GSM/GPRS

interface using the PC RS232 interface.

Configuration shall include:

2.2.8.1 Scanning of all Fault Passage Indicators in the short range radio range (at least 100m) and assigning

of an identification (typically number) to each of them, so that to allow identification of line (when

GSM/GPRS interface is monitoring 6 or 9 Fault Passage Indicators) and phase on the line on which each

Fault Passage Indicator is clipped-on, in order to allow identification by the control centre of line and phase

where faults or voltage absence are detected.

2.2.8.2 Configuration of fault detection thresholds and other characteristics.

2.2.8.3 Configuration of communication: PIN code, telephone numbers (control centre and mobile for

sending SMS messages), transmission speed, etc…

2.2.8.4 Configuration of alarms, as explained above

Diagnostic shall include at least display of the current value of all information monitored (Fault Passage

indicators list and status, Fault indications (phase-to-phase and phase-to-earth) from Fault Passage

indicators, digital inputs, measurements….) and an embedded protocol analyser showing frames received

and sent.

2.3 Additional requirements

2.3.1 Marking

Each Fault Passage Indicator shall carry a weather and corrosion proof plate indicating the following

particulars.

- Manufacturer’s identification.

- Model or type number (as per catalogue)

- Year of manufacture in characters big enough to allow reading from the ground so that to provide

indication of battery age.

2.3.2 Environmental specifications

2.3.2.1 Mechanical resistance to vibration and shocks

2.3.2.2 The equipment shall have vibration resistance in accordance with

2.3.2.3 IEC 60068.2.6: 10 to 500 Hz; 0.7 mm peak to peak from 10 to 59Hz and 5g from 59 to 500 Hz.

2.3.2.4 IEC 60068.2.27: 40g / 6 ms / 2000 positive and 2000 negative shocks in each direction, in the three

directions.

Dielectric withstand

IEC 61010 Insulation (50 Hz/1 min.): 2 kV

EN 60-950 Impulse wave (1.2/50 µs): 5 kV

Electromagnetic compatibility

P a g e | 126

Electrostatic discharge IEC 1000-4-2 Level 3

Radiated fields IEC 1000-4-3 Level 3

Radio frequency IEC 1000-4-6 Level 3

Magnetic immunity, 50 Hz, IEC 1000-4-8 Level 4

Emissions EN 55011 Class A

2.3.3 Environment

Operating temperature: -25°C to +55°C

Storage temperature: -25°C to +70°C

Humidity: 95% at 40°C

2.3.4 Documentation

Each device shall be supplied with a user manual for installation and commissioning on site.

A14: 22kV Fault Indicator (visual)

Table of contents:

1. General ………………………………………………………………..................................... 99

1.1 Scope………………………………………………………………………………………… 99

1.2 Quality Insurance………………………………………………………………..................... 99

2. Wireless communication Fault detection systems…………………………………............. 99

2.1 General information …………………………………………………………………............ 99

2.2 Operational specifications……………………………………………………........................ 102

2.3 Additional requirements……………. ………………………………………………............ 106

P a g e | 127

1. General

1.1 Scope

This specification applies to a system allowing to remotely monitor appearance of faults on

an Overhead Medium Voltage network so that to localise faulty sections and send patrols for

reconfiguration of the network accordingly.

The system shall be made of:

- Fault detection systems with wireless communication to be installed on Medium Voltage

Overhead Electric networks, as specified in this document,

- A piece of software to be installed on a PC in the control centre so that to display the

information from these Fault passage indicators. This shall be referred to as a Fault

Monitoring software. THIS IS NOT SPECIFIED IN THIS DOCUMENT.

1.2 Quality Insurance

The Bidder shall supply documentary proof that the manufacturer possesses ISO 9001 and

ISO 14001 Quality insurance certification, from an independent internationally recognized

body, for the design, manufacture and testing of Fault Indicators and remote monitoring and

control equipment for medium voltage lines

2. Wireless communication Fault detection systems


2.1.1 System parameters

The Fault detection systems shall be designed to operate on a Medium Voltage overhead

network with the following characteristics:

- Nominal Operation Voltage 4 to 69 kV

- System Maximum Voltage 69 kV

- Frequency 50 Hz (or 60HZ)

- Type of MV neutral earthing through a resistor or solidly grounded

- Conductor diameter 5 to 22 mm

One single product shall be proposed to cover the whole range of above characteristics:

Particularly, the same product should be installed on any network from 4 to 69 kV. Offers

requiring to have in stock 2 or more different product references depending on the Line

Voltage or on the conductor diameter shall not be considered.

2.1.2 Service conditions

The Fault detection system shall be designed to operate in the following environmental

conditions:

P a g e | 128

Symmetrical Fault Current 12.5 kA/1s and 25KA/170ms (maximum phase current

that the system shall withstand)

Shocks & vibrations 120 minutes of sine vibrations and 2000 negative and

2000 positive shocks, in OX, OY and OZ axes

Lightning surge 125kV shocks

Maximum Ambient Temperature 55° C

Maximum annual average

temperature

25° C

Humidity At least 95% during at least 2 24 hours cycles with

temperature up to +55°C according to IEC 68 2 30

2.1.3 Purpose of equipment

The main functions of the equipment are:

-To detect phase-to-phase and phase-to-earth fault currents on the MV network.

-To detect voltage presence interruptions.

-To time stamp faults and Voltage dips and store them in memory

-To transmit information to the control centre spontaneously via the GSM/GPRS network.

-To provide a local light indication of fault.

-To measure load current on the line.

-To provide operators with all useful information for fault finding and preventive

maintenance.

-To be self-supplied at all times, including during outages.

2.1.4 Constitution

2.1.4.1 Components

The equipment shall be made of the following parts:

-Fault Passage Indicators clipped on the overhead lines. One such device shall be clipped on

each phase so that to measure current and Voltage presence in this phase and compute fault

detection algorithm accordingly. A short-range radio interface shall be embedded in this

Fault Passage Indicator so that to allow it communicate with the GSM/GPRS communication

interface mentioned below.

-A GSM/GPRS communication interface, pole-mounted, acting as a communication gateway

between Fault Passage Indicators using short-range radio and the remote control centre using

GSM/GPRS communication.

-A solar supply kit, made of a solar panel and a rechargeable battery, mounted on the same

pole, appropriately dimensioned to continuously supply the GSM/GPRS communication

interface considering the average sun radiation in the country.

2.1.4.2 GSM/GPRS communication interface

P a g e | 129

The GSM/GPRS communication interface shall be designed to be mounted on a wooden,

concrete or metallic pole. It shall be able to interface up to 9 Fault Passage Indicators

installed in a 100m maximum range at least, corresponding to up to 3 overhead lines.

Solutions using a GSM/GPRS interface allowing to to interface only 3 or 6 Fault Passage

Indicators, i.e. 1 or 2 MV lines, or within a maximum range less than 100m shall NOT be

considered.

The GSM/GPRS communication interface maximum dimensions shall be 300 x 250 x 150

mm (H x L x D). This box shall include the following functions:

- Short range radio Interface to up to 9 Fault Passage Indicators in a 100m range.

- GSM/GPRS communication to control center

- Configuration of the communication interface (GSM/GPRS communication, definition of

alarms…) and Fault Passage Indicators (Fault detection thresholds…) by connection of a

laptop running the configuration software to an RS232 interface on the communication

interface. The same software shall also include full diagnostic capabilities.

It shall be supplied by the solar panel + battery block installed above it on the same same

pole. Connection cables between GSM/GPRS communication interface and solar panel +

battery block shall be provided.

2.1.4.3 Fault Passage Indicator

The Fault Passage Indicators shall be designed to be clipped on the Overhead MV line. 3

Fault Passage Indicators shall be clipped on one line, one on each phase. It shall include the

following functions:

- Measurement of current running in the phase it is clipped on

- Detection of Voltage absence/presence on the phase it is clipped on

- From the 2 previous functions, detection of phase-to-phase and phase-to-earth faults

- Short-range radio communication with a GSM/GPRS communication interface at a

maximum distance of 100m at least.

It shall be self-supplied from a non-rechargeable battery of a minimum life time 8 years, in

the temperature conditions specified above, including at least 1 short range radio

communication with the GSM/GPRS communication interface every hour and 300 hours

flashing for fault indication all over these 8 years.

The Fault Passage Indicators shall be suitable for outdoor use in the tropical climate

condition stipulated in the relevant paragraph. The components used in the Fault Passage

Indicators shall be suitably protected from direct sunlight to prevent malfunctioning due to

solar radiation. The maximum operating temperature shall not be less than 55° C. The Fault

Passage Indicators shall be suitable for mounting on live line conductors of a diameter

ranging between 5 and 25 mm, thanks to clamps designed so that the Fault Passage Indicator

can withstand winds of 150km/h without falling from the line. The Fault Passage Indicator

shall be fully self-contained type without any external connection, indicator or sensors. The

P a g e | 130

Fault Passage Indicators shall be suitable for use on multiple lines supported by the same

pole.

2.1.4.4 Solar panel supply kit

This kit shall be composed of a solar panel and rechargeable battery.It shall be provided with

a cable of minimum length 3m for connection to the GSM/GPRS communication interface

installed on the same pole.

2.2 Operational specifications

2.2.1 Fault detection

Fault detection shall be performed by the Fault Passage Indicator described above. Fault

sensing shall be made from current measurement and Voltage presence detection, based on

detection of the electromagnetic field and its variations.

The Fault Passage Indicator shall be of the programmable type, suitable for sensing:

- Short-circuit faults up to 12.5 kA for 1s and 25 kA for 170ms.

- Low earth leakage faults (referred to as “unbalance”) down to 6A.

The Fault Passage Indicators shall detect faults based on 2 simultaneous tripping criterias:

- In order to detect strong fault currents (typically phase-to-phase faults), it shall trip when

the phase current exceeds an absolute threshold for a fixed duration of about 20 to 30 ms.

This absolute threshold must be configurable to at least 8 different values between 100 and

800A.

- In order to detect low fault currents (typically resistant phase-to-earth faults), it shall trip

when it detects the phase current increase within a fixed duration (about 20 to 30ms) exceeds

a relative threshold. This threshold must be configurable to at least 6 different values

between 6 and 80A.

It shall be possible to disable this second tripping criteria.

When a fault occurs on the network, the upstream protection will trip within 70s maximum

(inverse time protection). Therefore, in order to prevent tripping due to a load increase, on

detection of one of the above criterias, the Fault Passage Indicators shall confirm the fault by

checking if the voltage disappears within the next 70s. and start to indicate the fault only

under this condition.

In case of faults, the Fault Passage Indicators which are detecting the variation of the

electromagnetic field due to fault current (Fault Passage Indicators installed between the

circuit breaker and fault point) shall provide a fault indication, while Fault Passage Indicators

downstream the fault or on non-faulty branches shall not provide any indication.

The fault indication shall be provided:

- by the means of a flashing light system offering a good contrast against sunshine (red color

is prefered) and an MTBF of the light emitting system at least 45 000 Hours (LEDs for

P a g e | 131

instance). It shall provide a light of an intensity of 40 Lumen minimum and give a 360°

visibility from at least 50m in sunny day conditions, and at least 300m at night.

- By an alarm sent to the GSM/GPRS interface which shall itself forward the alarm to the

control center according to its configuration.

The Fault indication shall remain until:

- a time-out, configurable to at least 4 possible values between 2 and 16 hours, has expired,

- the medium voltage is back,

- the Fault Passage Indicator is reset manually,

- whatever condition comes first.

Caution: since the load current might be very low upon MV return, load current reset is not

acceptable.

The Fault indication reset shall consist in:

- stopping the local light indication flashing

- sending an alarm to the GSM/GPRS interface which shall itself forward this alarm to the

control center according to its configuration.

The Fault Passage Indicator shall include some self-test possibility usable when it is on the

line (powered or not).

The Fault Passage Indicator shall be selective in action as indicated below

- It shall not respond to any sudden variation (increases/decrease) in load current

- It shall not respond to a overcurrent not due to a fault

- It shall not respond to high magnetising inrush currents, created upon line energising.

2.2.2 Detection of voltage presence and absence

The Fault Passage Indicator shall send a message to the GSM/GPRS interface as soon as it

detects disappearance or appearance of Voltage on the MV conductor. The GSM/GPRS

interface shall then memorise the information as a time-stamped event and send an alarm to

the control centre according to its configuration.

2.2.3 Digital inputs

The GSM/GPRS interface shall allow connection of information from sensors available in

the immediate vicinity to potential-free inputs. At least 6 potential-free digital inputs shall be

included in the GSM/GPRS interface.

2.2.4 Measurements

The Fault Passage Indicator shall continuously measure the current running in the conductor

on which it is clipped and periodically send the minimum, maximum and average values

measured. The GSM/GPRS interface shall then store this information to allow reading it

locally by connecting a PC or remotely from the control centre. The sending period shall not

be more than 1 hour.

2.2.5 Event time-stamping

P a g e | 132

Any change of state of information shall generate a time-stamped event stored in the

GSM/GPRS interface memory.

The event storage capacity shall be at least 100 events.

2.2.6 Short-range radio

Short range radio shall use license-free radio in the frequency bandwidth 902-928 MHz. It

shall be designed so that to allow a maximum distance between GSM/GPRS interface and the

Fault Passage Indicators equal to 100m or more.

Indicators of short range radio transmission quality shall be available and displayed by

connection of a PC to the GSM/GPRS interface.

Antennas for short-range radio communication shall be embedded in or fixed on the products

(GSM/GPRS interface and Fault Passage Indicator) so that no specific installation is

required.

2.2.7 Communication with the control centre

Communication between the GSM/GPRS interface and the control centre shall be through

GSM/GPRS network, dual-band 900 MHz – 1800 MHz, and using any standard protocol.

It shall allow communication in 2 ways:

- At any time, based on configured periodic calls or on operator action, the GSM/GPRS

interface shall be ready to receive a call from the control centre

- Whenever a monitored information declared as alarming in the GSM/GPRS interface

configuration changes status, the GSM/GPRS interface shall make a call to the control centre

and send it an alarm.

Each monitored information (fault current detection, voltage absence/presence, digital inputs

etc…) shall be configurable as "alarming" when changing state, individually and

independently of others. If used with GSM communication, as an addition to the alarm to the

control centre, it shall be possible to configure the GSM/GPRS interface so that it send an

SMS message to a mobile phone. The configuration software shall allow to define the mobile

phone number and SMS messages service centre number.

Monitored information configurable as “alarming” shall include at least the following,

consisting both of MV network diagnostic information and monitoring equipment internal

faults for self-diagnostic purpose:

- Fault detection appearance with indication of Fault Passage Indicator reporting the fault and

tripping criteria tripped.

- Fault detection disappearance with indication of Fault Passage Indicator reporting the fault

and tripping criteria tripped.

- Voltage absence

- Voltage presence

- Change of state of a digital input

P a g e | 133

- Fault Passage Indicator absent (failure of the GSM/GPRS communication interface to

communicate with it through short range radio)

- Fault Passage Indicator battery low

2.2.8 Configuration and maintenance

Equipment configuration and diagnostic shall be performed by connection of a laptop PC to

the GSM/GPRS interface using the PC RS232 interface.

Configuration shall include:

2.2.8.1 Scanning of all Fault Passage Indicators in the short range radio range (at least 100m)

and assigning of an identification (typically number) to each of them, so that to allow

identification of line (when GSM/GPRS interface is monitoring 6 or 9 Fault Passage

Indicators) and phase on the line on which each Fault Passage Indicator is clipped-on, in

order to allow identification by the control centre of line and phase where faults or voltage

absence are detected.

2.2.8.2 Configuration of fault detection thresholds and other characteristics.

2.2.8.3 Configuration of communication: PIN code, telephone numbers (control centre and

mobile for sending SMS messages), transmission speed, etc…

2.2.8.4 Configuration of alarms, as explained above

Diagnostic shall include at least display of the current value of all information monitored

(Fault Passage indicators list and status, Fault indications (phase-to-phase and phase-to-earth)

from Fault Passage indicators, digital inputs, measurements….) and an embedded protocol

analyser showing frames received and sent.

2.3 Additional requirements

2.3.1 Marking

Each Fault Passage Indicator shall carry a weather and corrosion proof plate indicating the

following particulars.

- Manufacturer’s identification.

- Model or type number (as per catalogue)

- Year of manufacture in characters big enough to allow reading from the ground so that to

provide indication of battery age.

2.3.2 Environmental specifications

2.3.2.1 Mechanical resistance to vibration and shocks

2.3.2.2 The equipment shall have vibration resistance in accordance with

2.3.2.3 IEC 60068.2.6: 10 to 500 Hz; 0.7 mm peak to peak from 10 to 59Hz and 5g from 59

to 500 Hz.

2.3.2.4 IEC 60068.2.27: 40g / 6 ms / 2000 positive and 2000 negative shocks in each

direction, in the three directions.

P a g e | 134

Dielectric withstand

IEC 61010 Insulation (50 Hz/1 min.): 2 kV

EN 60-950 Impulse wave (1.2/50 µs): 5 kV

Electromagnetic compatibility

Electrostatic discharge IEC 1000-4-2 Level 3

Radiated fields IEC 1000-4-3 Level 3

Radio frequency IEC 1000-4-6 Level 3

Magnetic immunity, 50 Hz, IEC 1000-4-8 Level 4

Emissions EN 55011 Class A

2.3.3 Environment

Operating temperature: -25°C to +55°C

Storage temperature: -25°C to +70°C

Humidity: 95% at 40°C

2.3.4 Documentation

Each device shall be supplied with a user manual for installation and commissioning on site.

P a g e | 135

V. Technical Schedules – LOT2

P a g e | 136

PREAMBLE

1.1 The Technical Schedules shall be filled in and completed by the Bidder, and submitted with the

Bid.

1.2 All documentation necessary to evaluate whether the equipment offered is in accordance with

this Specification shall be submitted with the Bid.

1.3 All data entered in the Schedules of Technical Guarantees are guaranteed values by the Bidder

and cannot be departed from whatsoever.

1.4 All data entered in the Schedules of Informative. Data are also guaranteed values by the Bidder.

These data may only be altered following the Engineer's written consent.

P a g e | 137

B1: 36kV, under-ground cable, single core 1x400mm2 AL (XLPE/PVC)

Nº Description Unit Required Offered specifications

1 Cable Design NA2XS(FL)2Y

2 Insulation Material XLPE

3 Design Voltage Uo/U (Um) kV 19/33 (36)

4 Cross section mm2 400

5 Conductor material AL

6 No. of Cores 1

7

The conductor is covered with:

1. swelling powder to prevent axial ingress of water along the conductor

2. An extruded semi-conducting layer

3. A layer of dry vulcanized cross-linked polyethylene (XLPE) insulation

4. An extruded vulcanized semi-conducting layer

5. A layer of swelling tape to prevent axial ingress of water along the screen

6. A layer of earthing screen of stranded copper, connection between copper and aluminum

7. A layer of longitudinal aluminum to prevent water break-through

8. A black outer LDPE (low density polyethylene) sheath that is laminated to the longitudinal

Yes/No Yes

P a g e | 138

aluminum, for water tightness and mechanical protection.

8 Minimum No. of wires in

conductor No. 30

9 Nominal insulation thickness mm 8

10 Nominal sheath thickness mm 3.4

11 Approximate outer diameter mm 50.2

12 Minimum bending radius mm 1100

13 Approximate cable weight kg/km 3200

14 Max. conductor DC resistance

at 20°C Ω/km 0.0778

15 Short Circuit rating conductor

(1 sec) kA 36.8

16 Standard supply lengths m 1000

17 Maximum temperature rise of

conductor oC 90

P a g e | 139

B2: 36kV, under-ground cable, single core 1x150mm2 AL (XLPE/PVC)


1 Cable Design NA2XS(FL)2Y


3 Design Voltage Uo/U (Um) kV 19/33 (36)


5 Conductor material AL

6 No. of Cores 1

7

The conductor is covered

with:

1. swelling powder to prevent axial ingress of water along the conductor

2. An extruded semi-conducting layer

3. A layer of dry vulcanized cross-linked polyethylene (XLPE) insulation

4. An extruded vulcanized semi-conducting layer

5. A layer of swelling tape to prevent axial ingress of water along the screen

6. A layer of earthing screen of stranded copper, connection

Yes/No Yes

P a g e | 140

between copper and aluminum

7. A layer of longitudinal aluminum to prevent water break-through

8. A black outer LDPE (low density polyethylene) sheath that is laminated to the longitudinal aluminum, for water tightness and mechanical protection.

8 Minimum No. of wires in

conductor No.

9 Nominal insulation

thickness mm 8

10 Nominal sheath thickness mm 2.4

11 Approximate outer

diameter mm 39.9

12 Minimum bending radius mm 900

13 Approximate cable weight kg/km 2000

14 Max. conductor DC

resistance at 20°C Ω/km 0.206

15 Short Circuit rating

conductor (1 sec) kA 13.9

16 Standard supply lengths m 1000

17 Maximum temperature

rise of conductor oC 90

P a g e | 141

B3: Outdoor termination for 36 kV, under-ground cable, 1 core 1x150mm2 Al (XLPE/PVC) (Set of 3

phases), Including Compression terminal lug for 150mm2 Al


specifications

1 Name of Manufacturer

2 Country of Origin

3 Standards IEC60502 & CENELEC

HD629.1 S1

4 Max. Service Voltage (Um) kV 36

5 Outdoor Termination Material ,

form , Designation

Heat Shrink Tubing and

Molded Parts Shall be

Flexible, Made from

Specially Formulated

Cross-Lined Polymeric

6 Cable and Conductor Type Single Core Conductor

Cable with Al Wire Shield

7 Cable Insulation Type XLPE

8 Conductor Cross Sectional Area mm2 150

9 Number of Rain Sheds No 4

P a g e | 142

10

Insulating , Electrical Material

and Rain Shed Brittle

Temperature

oC <-40

11

Impulse withstand Voltage Test

1.2 Micro Second Between

Conductor & Screen Grounded

kV 170

12- Test :

12.1

All Type tests reports by

qualified laboratory according

to CENELEC HD 629.1 S1

Required

12.2 Routine test report Required

13

Heat Shrinkable Outdoor Termination Kit Parts

Bimetallic Terminal

Mechanical Lug with 13 mm

Hole and 3 each Shear_Head

Bolts (for Aluminium or

Copper Conductors)

Required

Anti-Tracking Sleeve Required

Rain-Sheds (4each) Required

Stress Control Sleeve Required

Stress Control Mastic Required

P a g e | 143

Binding Wire Required

Worm Drive Clamp Required

Copper Braid (Earthlings) Required

17 Installation Instruction

Documents Required

P a g e | 144

B4: Outdoor termination for 36 kV, under-ground cable, 1 core 1x400mm2 Al (XLPE/PVC) (Set of 3

phases), Including Compression terminal lug for 400mm2 Al


specifications


2 Country of Origin

3 Standards IEC60502 & CENELEC

HD629.1 S1

4 Max. Service Voltage (Um) kV 36

5 Outdoor Termination Material ,

form , Designation

Heat Shrink Tubing and

Molded Parts Shall be

Flexible, Made from

Specially Formulated

Cross-Lined Polymeric

6 Cable and Conductor Type Single Core Conductor

Cable with Al Wire Shield

7 Cable Insulation Type XLPE

8 Conductor Cross Sectional Area mm2 400

P a g e | 145

9 Number of Rain Sheds No 4

10

Insulating , Electrical Material

and Rain Shed Brittle

Temperature

oC <-40

11

Impulse withstand Voltage Test

1.2 Micro Second Between

Conductor & Screen Grounded

kV 170

12- Test :

12.1

All Type tests reports by

qualified laboratory according

to CENELEC HD 629.1 S1

Required

12.2 Routine test report Required

13

Heat Shrinkable Outdoor Termination Kit Parts

Bimetallic Terminal

Mechanical Lug with 13 mm

Hole and 3 each Shear_Head

Bolts (for Aluminium or

Copper Conductors)

Required

Anti-Tracking Sleeve Required

Rain-Sheds (4each) Required

Stress Control Sleeve Required

P a g e | 146

Stress Control Mastic Required

Binding Wire Required

Worm Drive Clamp Required

Copper Braid (Earthlings) Required

17 Installation Instruction

Documents Required

P a g e | 147

B5: Straight joint for 36 kV, under-ground cable, single core 1x150 mm2 Al (XLPE/PVC)(Set of 3

phases), Including filler for 150mm2 Al


1 Submittal of

Drawings/catalogues

Yes/No YES

2 Type Outdoor Straight

joint for under-

ground cable, single

core 1x150 mm2 Al

(XLPE)

3 Dimensions single core 1x150

mm2 Al (XLPE)

4 Length mm 1860

P a g e | 148

B6: Straight joint for 36 kV, under-ground cable, single core 1x400 mm2 Al (XLPE/PVC)(Set of 3

phases), Including filler for 400mm2 Al


1 Submittal of

Drawings/catalogues

Yes/No YES

2 Type Outdoor Straight

joint for under-

ground cable, single

core 1x400 mm2 Al

(XLPE)

3 Dimensions single core 1x400

mm2 Al (XLPE)

4 Length mm 1860

P a g e | 149

VI. Technical Schedules – LOT3

P a g e | 150

C1: ACSR Conductor 185mm2/25mm2(DIN 48.204)



2 Country of Origin

3 Reference Manufacturing Standards

German Conductor

Sizes DIN48204 or

EN 50182

5 Type

Aluminum

Conductor Steel

Reinforced - (ACSR)

6 Core Material

Greased Stranded

Galvanized Steel

Wires

7 Conductor Material Stranded

Aluminum Wires

8 Code ACSR 185/25

9 Nominal Cross-Sectional area of

ACSR Wire mm2 204

10 Number of Steel Core Strands No. 7

11 Diameter of Steel Core Strand mm 2.1

12 Number of Aluminum Strands No. 26

13 Diameter of Aluminum Strand mm 2.7

14 Total Overall Diameter of Conductor mm 17.1

P a g e | 151

15 Max. Conductor DC Resistance at 20

°C Ω/km 0.1939

16 Breaking Strength Newton 55250

17 Min. Current Rating in free Air Amps 470

18 Conductor resistance for base

temperature 20 Co ohm/Km

shall be filled by

manufacturer

19 Modulus of Elasticity kg/mm2 shall be filled by

manufacturer

20 Coefficient of Thermal Elongation ,

per oC

shall be filled by

manufacturer

21 Weight of Aluminum Conductors kg/km 414

22 Weight of Steel Conductors kg/km 191

23 Total Weight of the Conductor kg/km shall be filled by

manufacturer

24 Drum Material New Wood

25 Cable Protection on Drum Wooden Batten

26 Drum Dimensions shall be filled by

manufacturer

27 Conductor Length on Drum m 1000

28

Type Test Certificates/Reports from

internationally reputed testing

agency

Required

29

Acceptance & Routine tests

witnessed by two PEA

representatives

Required

P a g e | 152

C2: ACSR conductor 150mm2/15mm2(DIN 48.204)



2 Country of Origin

3 Reference Manufacturing Standards

German Conductor

Sizes DIN48204 or

EN 50182

5 Type

Aluminum

Conductor Steel

Reinforced - (ACSR)

6 Core Material

Greased Stranded

Galvanized Steel

Wires


Aluminum Wires

8 Code ACSR 150/25


ACSR Wire mm2 173.1






P a g e | 153


°C Ω/km 0.1939




temperature 20 Co ohm/km

shall be filled by

manufacturer


manufacturer


per oC

shall be filled by

manufacturer




manufacturer




manufacturer


28



agency

Required

29



representatives

Required

P a g e | 154

C3: ACSR conductor 50mm2/8mm2(DIN 48.204)



2 Country of Origin

3 Reference Manufacturing Standards British Sizes BS215

PART2 or EN 50182

4 Type

Aluminum

Conductor Steel

Reinforced - (ACSR)

5 Core Material

Greased Stranded

Galvanized Steel

Wires


Aluminum Wires

7 Code ACSR Rabbit


ACSR Wire mm2 61.7






P a g e | 155


°C Ω/km 0.5426




temperature 20 Co ohm/km

shall be filled by

manufacturer


manufacturer


per oC

shall be filled by

manufacturer




manufacturer




manufacturer


27



agency

Required

28



representatives

Required

P a g e | 156

C4: ADSS Optical Cable CentraCore included all accosseries, junction boxes and fetings

NOTE: A separate schedule is to be provided for each item offered except for

details common to all items which only needs to be provided once.

PARTICULARS UNITS ITEM No.

Manufacturer's Name and Address

Place of Manufacture

Cable Details:

Nominal Overall Diameter mm

Calculated Breaking Load kN

Maximum permissible cable tension kN

Effective Cross Sectional Area mm2

Effective Modulus of Elasticity GPa

Coefficient of Linear Expansion per oC

Nominal Mass kg/km

Maximum permissible cable strain % strain

Guaranteed strain free window % strain

Minimum permissible cable bending radius

No tension mm

Maximum permissible tension mm

Minimum permissible radius of stringing

sheaves mm

Packaging Details:

Type of Drum

AS 2857-1986 Drum Designation

AS 3983-1991 Drum Designation

Spindle Hole Diameter mm

Method of Lagging

Length of Conductor per Drum m

Gross Mass of Drum, Conductor and kg

Protective External Lagging

P a g e | 157

Mass of Drum and Conductor kg

Drum Surface Treatment:

Barrel:

Drum Surface Treatment:

Internal Surface of Flanges

Metal Drum:

Protection Against Weather or Environment

SINGLE MODE:

Mode field diameter at 1310 nm µm

and Tolerance %

Attenuation

(at zero fiber tension)

At 1310 nm dB/km

At 1550 nm dB/km

Maximum permissible fiber strain % strain

Fiber Proof test strain % strain

Attenuation

(at Maximum permissible fiber strain)

At 1310 nm dB/km

At 1550 nm dB/km

Optical cladding diameter µm

and Tolerance %

Dispersion

1270 to 1340 nm ps/km.nm

1550 nm ps/km.nm

Dispersion Slope at Zero Dispersion ps/(nm2-

Wavelength km)

Maximum continuous operating temperature ºC

Minimum bending radius for coated optical

fiber

Under no tension mm

Under maximum tension mm

P a g e | 158

C5: Stranded Copper Conductor 35mm2 (Solid)


specifications

1 Conductor section mm2 35

2 Conductor diameter mm

3 Stranding

(a) Aluminium Nº/mm

(b) Aluweld Nº/mm

(c) Cu Nº/mm

(d) Fe Nº/mm

DC resistance at 20 °C Ohm/km

Modulus of elasticity kN/mm2

4 Ultimate specific tensile strength kN/mm2

Thermal coefficient of expansion ºC-1

Wight of Aluminum or Copper kg/km

kg/m

Weight kg

Weight of heaviest reel, including cable

Size of biggest reel, diameter/width mm/mm

P a g e | 159

C7: Polymeric tension insulator 36 kV-1170 creepage distance ACSR, complete with Fittings for

Dead end tension set, suitable for fixing (120- 185) mm2 ACSR to steel poles. There shall be an

adjustable part in the set, for adjustment when stringing


specifications

1 Voltage kV 36

2 Insulation Material Polymeric

3 Total length mm 585 mín

4 Max. working load kN 70

5 Breaking load kN 70

6 Creepage distance

(a) Total

mm 1170 mín

(b) Protected

mm 1170 mín

7 Power Freq/Impulse withstand voltage kV/kV 170

(a) Dry

kV 170

(b) wet

kV 170

P a g e | 160

C8: 36 kV Pin insulator 170 mm pin with 2 nuts, 100 mm threads


specifications

1 Voltage kV 36

2 Insulation Material Polymeric

3 Cantilever Strength kN 10

4 Total length mm 430 min

5 Max. working load kN 10

6 Breaking load kN 10

7 Creepage Distance

(a) Total mm 1170

8 (b) Protected mm 1170

9 Power Freq/Impulse withstand voltage kV/kV 170

10 (a) Dry kV 170

11 (b) wet kV 170

12 Spindle-Thread diameter mm 140 min

P a g e | 161

C9: Lightning Arresters 36kV


specifications

1 Maximum Voltage kV 36

2 Rated Voltage Uc kV 33

3 Maximum con.s operating voltage kV rms 21

4 Rated frequency Hz 50

5 Rated discharge current kA 10

6 Line discharge class 2

7 Impulse withstand current, 4/10 ms kA 100

8 Pressure relief capability to IEC 99

8.1 (a) 0.2 sec. fault duration kA rms 20

P a g e | 162

C10: Lightning Arresters 24kV


specifications

1 Maximum Voltage kV 24

2 Rated voltage Uc kV rms 22

3 Maximum con.s operating voltage kV rms 15

4 Rated frequency Hz 50

5 Rated discharge current kA 10

6 Line discharge class 2

7 Impulse withstand current, 4/10 ms kA 100

8 Pressure relief capability to IEC 99

8.1 (a) 0.2 sec. fault duration kA rms 20

P a g e | 163

C11: Parallel groove clamp for ACSR 120- 185 mm2


specifications


2 Country of Origin

3 Reference Manufacturing

Standards DIN 48072-1

4

Material

a) Body

High strength, corrosion-

resistant, Aluminium alloy

(AlMgSi1)

b) Bolts DIN 933, steel 8.8, hot-dip

galvanized

c) Nuts

DIN 934, steel

hot−dip galvanized,

pressed into lower

clamp body

d) Conical Washers DIN 6796, corrosion-protected

5 Conductor Cross Sectional

Area mm2

120-185 AL and 120/15-185/

ACSR

6 Conductor Diameter mm 14-16

7 Bolts (No. x Size x Length) 3 x M8 x 70

8 Bolt Torque Moments 46Nm

P a g e | 164

C12: Parallel groove clamp for ACSR 50- 125 mm2


specifications


2 Country of Origin

3 Reference Manufacturing

Standards DIN 48072-1

4

Material

a) Body

High strength, corrosion-

resistant, Aluminum alloy

(AlMgSi1)

b) Bolts DIN 933, steel 8.8, hot-dip

galvanized

c) Nuts

DIN 934, steel

hot−dip galvanized,

pressed into lower

clamp body

d) Conical Washers DIN 6796, corrosion-protected

5 Conductor Cross Sectional

Area mm2

50-125 AL and 50/8-125/15

ACSR

6 Conductor Diameter mm 3.35-14

7 Bolts (No. x Size x Length) 2 x M8 x 50

8 Bolt Torque Moments 23Nm

P a g e | 165

C30: PVC Insulated Standard Compacted Circular Copper Conductor 1*70 mm2 Yellow/Green


specifications

1 Type designation


3 Design Voltage kV 0.6/1


5 Conductor Material Cu

6 Number of Cores 1

7 Weight of conductor material (Cu) kg/m

8 Continuous current carrying capacity at

ambient temperature of 45°C A 270 (min.)

9 Maximum temperature rise of conductor °C 90

10 Short-circuit capacity, 1 sec kA

11 Test voltage kV 3.5

12 Minimum numbers of turns pr. 40 x bundle

diameter

13 Cable designation

14 Overall diameter of cable mm

15 Weight of heaviest reel, including cable kg

16 Size of biggest reel, diameter/width mm/mm

17 Weight of row material (Cu) kg/m

P a g e | 166

P a g e | 167

VII. Technical Schedules – LOT4

P a g e | 168

E1: 400 kVA, 33-22/0.4 kV Dual ratio outdoor Pole Mounted Distribution Transformer 3 phase,

with off load Tapchanger


specifications

1 Continuous Maximum Rating (C.M.R) kVA 400

2 Vector Group Dyn11 Dyn11

3 Normal voltage between phases at no

load

3.1 a) H.V. Volts 33/22kV

3.2 b) L.V. Volts 400

4 Transformer withstand up to 10%

over-voltage without injurious

overheating

Yes/No Yes

5 Tappings No. 7

5.1 a) Plus No. 3x2.5%

5.2 b) Minus No. 3x2.5%

6 Losses

6.1 a) No load loss at normal primary

voltage (no tolerances on high

side)

watts Max 780

6.2 c) Load loss at C.M.R. (no

tolerances on high side)

watts Max 4500

7 Impedance volts at C.M.R. and

normal ratio

% Max. 6%

8 Max temperature rise at C.M.R.:

P a g e | 169

8.1 i) Top oil by thermometer oC 55

8.2 ii) Average winding by

resistance

oC 60

8.3 iii) “Hot Spot” corresponding to

(ii)

oC 115

9 Lightning Impulse Insulation level of:

9.1 a) H.V. winding kVpk 170

9.2 b) L.V. winding kVpk 20

10 Max. core flux density at normal

voltage and frequency at normal

ratio

T 1.7

11 Type of winding (i.e. Cu or Al, foil or

layer)

11.1 (a) HV winding Cu

11.2 (b) LV winding Cu

12 Rated Insulation Level

12.1 (a) 1.2/50 s wave kV

(peak)

170/125

12.2 (b) Power frequency

withstand voltage

kV 70/50

13 Indoor/outdoor outdoor

14 Total external creepage distance 900 - 1050 min

15 Protected creepage distance 900 - 1050 min


16.1 (a) 1.2/50 s wave 33kv 22kv

P a g e | 170

KV

(peak)

170 125

16.2 (b) Power frequency

withstand voltage wet

kV 33kv 22kv

70 50

17 Transformer type (sealed or

breathing)

breathing

18 Type of tap changer Off load

19 Conservator tank

19.1 Tank Drain valves screwed or flanged

19.2 Conservator isolating valves flanged

20 Transformer withstand up to 10%

over-voltage With voltage without

injurious overheating

Yes/No Yes

21 L.V. neutral earthed inside the tank Yes/No No

22 Transformer with Earth studs at both

the H.V. and the L.V. ends of

transformer

Yes/No Yes

23 Bushings arcing horn flash over

distances

mm 130-140

24 insulating oil shall not contain

matters that are not biodegradable

such as PCB

Yes/No Yes

25 Transformer filled with low viscosity

mineral insulation oil

Yes/No Yes

26 Insulation oil complies with the

provision of IEC 60296

Yes/No Yes

P a g e | 171

27 IEC standard for transformer

connection

Yes/No IEC 60076

28 Oil weight Kg

29 Total weight kg

30 Overall dimensions

a) Length

b)Width

c) Height

mm

mm

mm

31 Method of painting

32 Type of paint

33 Thickness of paint

P a g e | 172

E2: 160 kVA, 33- 22/0.4 kV Dual ratio outdoor Pole Mounted Distribution Transformer 3 phase,

with off load Tapchanger


specifications

1 Continuous Maximum Rating (C.M.R) kVA 160

2 Vector Group Dyn11 Dyn11

3 Normal voltage between phases at no load

3.1 a) H.V. Volts 33/22kV

3.2 b) L.V. Volts 400

4 Transformer withstand up to 10% over-

voltage without injurious overheating

Yes/No Yes

5 Tappings No. 7

5.1 a) Plus No. 3x2.5%

5.2 b) Minus No. 3x2.5%

6 Losses

6.1 a) No load loss at normal primary

voltage (no tolerances on high side)

watts Max 780

6.2 c) Load loss at C.M.R. (no tolerances on

high side)

watts Max 3500

7 Impedance volts at C.M.R. and normal

ratio

% Max. 6%

8 Max temperature rise at C.M.R.:

8.1 i) Top oil by thermometer oC 55

8.2 ii) Average winding by resistance oC 60

P a g e | 173

8.3 iii) “Hot Spot” corresponding to (ii) oC 115

9 Lightning Impulse Insulation level of:

9.1 a) H.V. winding kVpk 33kV 22kV

170 125

9.2 b) L.V. winding kVpk 20

10 Max. core flux density at normal voltage

and frequency at normal ratio

T 1.7

11 Type of winding (i.e. Cu or Al, foil or layer)

11.1 (a) HV winding Cu

11.2 (b) LV winding Cu


12.1 (a) 1.2/50 s wave kV

(peak)

33kV 22kV

170 125

12.2 (b) Power frequency withstand

voltage

kV 33kV 22kV

70 50

13 Indoor/outdoor outdoor

14 Total external creepage distance 900 - 1050 min

15 Protected creepage distance 900 - 1050 min


16.1 (a) 1.2/50 s wave kV

(peak)

33kV 22kV

170 125

16.2 kV 33kV 22kV

P a g e | 174

(b) Power frequency withstand

voltage wet

70 50

17 Transformer type (sealed or breathing) breathing

18 Type of tap changer Off load

19 Conservator tank Yes/No Yes

19.1 Tank Drain valves screwed or

flanged

19.2 conservator isolating valves flanged

20 Transformer withstand up to 10% over-

voltage With voltage without injurious

overheating

Yes/No Yes

21 L.V. neutral earthed inside the tank Yes/No No

22 Transformer with Earth studs at both the

H.V. and the L.V. ends of transformer

Yes/No Yes

23 Bushings arcing horn flash over distances mm 130-140

24 insulating oil shall not contain matters

that are not biodegradable such as PCB

Yes/No Yes

25 Transformer filled with low viscosity

mineral insulation oil

Yes/No Yes

26 Insulation oil complies with the provision

of IEC 60296

Yes/No Yes

27 IEC standard for transformer connection Yes/No IEC 60076

28 Oil weight kg

29 Total weight kg

30 Overall dimensions mm

P a g e | 175

a) Length

b)Width

c) Height

mm

mm

31 Method of painting

32 Type of paint

33 Thickness of paint

P a g e | 176

E3: 33 kV Capacitor Bank 300 KVA


specifications

1 Altitude of site above sea level m - 276 to 900

2 Ambient Temps:

3 Maximum C° 50

4 Minimum C° -5

5 Wind Speed m/s 15



8 Relative Humidity

9 Maximum % 100

10 Minimum % <10

11 Rainfall Average Annual mm 600

12 Hail Yes

13 Fog Yes

14 Erection Outdoor/

Indoor

Outdoor pole-

mounted

15 Nominal system voltage phase to phase kV 33

16 Highest system voltage phase kV 36

17 System frequency Hz 50

18 System earth Solid

19 Impulse withstand voltage (1.2/50 u sec wave) kV peak 170

P a g e | 177

20 Power frequency withstand voltage 1 minute kV 85

21 Assumed highest switching surge 3.5

22 Rated power kVAR 300

23 Rated voltage kV 33


25 Insulation level kV 70/170

Each capacitor bank consists of:

A 3 single-phase internally protected capacitor:

Rated voltage kV 33

Rated Frequency Hz 50

Temperature class °C -5/+45

Connection Delta

Nº of units in series/phase Nº 1

Nº of units in parallel/phase Nº 1

Discharge time per unit <75V in 600

sec.

B 3 silicon polymer Zinc-oxide surge arrester for

installation in a solidly grounded system:

Phase-phase kV 33

Rated voltage kV rms 36

Discharge current kA 10

The 33kv capacitor banks are installed in hot-dip galvanized steel racks. The racks are each

supported by four 33kv insulator.

P a g e | 178

E4: 22 kV Capacitor Bank 300 kVAR


specifications

1 Altitude of site above sea level m - 276 to 900

2 Ambient Temps:

3 Maximum °C 50

4 Minimum °C -5

5 Wind Speed m/s 15



8 Relative Humidity

9 Maximum % 100

10 Minimum % <10

11 Rainfall Average Annual mm 600

12 Hail Yes

13 Fog Yes

14 Erection Outdoor/

Indoor

Outdoor pole-

mounted

15 Nominal system voltage phase to phase kV 22

16 Highest system voltage phase kV 24

17 System frequency Hz 50

18 System earth Solid

19 Impulse withstand voltage (1.2/50 u sec wave) kV peak 125

P a g e | 179

20 Power frequency withstand voltage 1 minute kV 50

21 Assumed highest switching surge 3.5

22 Rated power kVAR 300

23 Rated voltage kV 22


25 Insulation level kV 125

Each capacitor bank consists of:

A 3 single-phase internally protected capacitor:

Rated voltage kV 22

Rated Frequency Hz 50

Temperature class °C -5/+45

Connection Delta

Nº of units in series/phase Nº 1

Nº of units in parallel/phase Nº 1

Discharge time per unit <75V in 600 sec.

B 3 silicon polymer Zinc-oxide surge arrester for

installation in a solidly grounded system:

Phase-phase kV 22

Rated voltage kV rms 24

Discharge current kA 10

The 22 kV capacitor banks are installed in hot-dip galvanized steel racks. The racks are each supported by

four 22 kV insulator.

P a g e | 180

VIII. Technical Schedules – LOT5

P a g e | 181

Technical Guarantees for Items J1-J34: Steel Materials


1 Manufacturer

2 Supplier Drawings according

to PETL drawings

Yes/NO Yes

3 Thickness of zinc coating,

steel members

μm 84min

4 Thickness of zinc coating, nuts

and bolts

μm 40min

5 Type of steel for members,

lattice structures

RST-37/2

6 Strength class of steel N/mm2 360 UP TO 510

7 Yield point N/mm2 235(THICKNESS<16mm

8 Type/class of bolts and nuts GRADE 8.8 to BS 4190

9 Self-supporting construction Yes/NO Yes

10 Hot Dip Galvanized Yes/NO Yes

*The supplier shell bring method and statement design