consultant specification medium voltage metal enclosed ...pub/@eaton/@holec/documents/... ·...

of 11 Version 1.1 march 2012

Eaton Industries (Netherlands) B.V.Europalaan 202, 7559 SC Hengelo

Postbus / P.O. Box 23, 7550 AA HengeloThe Netherlands

tel.: +31 (0)74 246 9111fax: +31 (0)74 246 4444

Consultant Specification Medium voltage metal enclosed

withdrawable switchgear

Datacenter application MV connection to the grid


GENERAL

Scope1.01The Contractor shall furnish and install medium voltage metal-enclosed indoor withdrawable A.vacuum circuit breaker switchgear equipment as specified herein and as shown on the contract drawings. Unless otherwise shown on the contract drawings the switchgear shall be front accessible such that it can be installed against the wall and shall not require rear access for its maintenance, inspection, or operation. Cable access shall be from below.Only Air Insulated Switchgear and vacuum circuit breakers are acceptable. The use of SF6 is B.not permitted.

Related Sections1.02Contract DrawingsA.Project Data SheetsB.

References1.03The medium voltage metal-enclosed switchgear and all components shall be designed, A.manufactured and tested in accordance with the latest applicable IEC standards as follows:

IEC62271-1 Common specifications for high-voltage switchgear and controlgear standards

IEC62271-100 High-voltage alternating-current circuit-breakersIEC62271-102 Alternating current disconnectors and earthing switchesIEC62271-106 High-voltage alternating current contactorsIEC62271-200 A.C. metal-enclosed switchgear and controlgear for rated

voltages above 1 kV and up to and including 52 kVIEC60529 Degrees of protection provided by enclosuresIEC60044-1 Instrument transformers - Part 1: Current transformersIEC60044-2 Instrument transformers - Part 2: Inductive voltage transformersIEC60282 High-voltage fusesIEC 60051 Direct acting indicating analogue electrical measuring instruments

and their accessories - All PartsIEC 60417 Graphical symbols for use on equipmentIEC 60470 High-voltage alternating current contactors and contactor-based

motor-startersIEC 60644 High-voltage fuse-links for motor circuit applicationsIEC 60529 Degrees of protection provided by enclosures

Submittals – for Tender Review/Approval 1.04With the Tender/Bid the following information shall be supplied:A.

Copy of the Type Test Certificate to confirm compliance with IEC 62271-200 for 1.the switchgear and IEC 62271-100 for the vacuum circuit breaker. This shall be from an accredited, internationally recognized, third party laboratory, self-certification is unacceptable. Acceptable laboratories are:

CESI, Milan, Italy1.KEMA, The Netherlands2.IPH, Berlin, Germany3.Front view elevation drawing2.Floor plan3.Single Line drawing4.Full equipment list and specification of each individual section of the MV 5.

Switchgear. Product data sheet and or catalogue6.


After the placement of an order, the following information shall be submitted to the Engineer B.for approval:

Master drawing register1.Front view elevation2.Floor plan3.Top view4.Single line5.Schematic diagram6.Nameplate schedule7.Component list8.Conduit entry/exit locations9.Assembly ratings including:10.

Short-circuit ratinga.Voltageb.Continuous currentc.Basic Impulse Leveld.Internal Arc Classificatione.

Major component ratings including:11.Voltagea.Continuous currentb.Interrupting ratingsc.

Cable terminal sizes12.Product data sheets.13.

Where applicable the following additional information shall be submitted to the Engineer:C.Busway connection1.Connection details between close-coupled assemblies2.Composite floor plan of close-coupled assemblies3.Electrical Schematic diagram4.Key interlock scheme drawing and sequence of operations5.Descriptive bulletins6.Product data sheets7.Installation recommendations for arc channel.8.

Submittals – for CONSTRUCTION1.05The following information shall be submitted for record purposes:A.

Final as-built drawings and information for items listed in paragraph 1.041.Wiring diagrams2.Routine Test reports3.Installation information including equipment anchorage provisions4.Installation and Maintenance Manual5.

Qualifications1.06The manufacturer of the switchgear shall also be the manufacturer of the vacuum circuit A.breaker used within the assembly.For the equipment specified herein, the manufacturer shall be ISO 9000:2000, 9001 or 9002 B.certified.The manufacturer of this equipment shall have produced medium voltage metal-enclosed C.switchgear equipment for similar functions for a minimum period of five (5) years. When requested by the Engineer, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.

Regulatory Requirements1.07Compliance with IEC 62271-100 and IEC 62271-200.A.Compliance with any local utility requirements.B.


Delivery, storage and handling1.08Each switchgear assembly shall be split into shipping groups for handling as indicated on the A.drawings or per the manufacturer’s recommendations. All draw out elements must be shipped installed in their respective compartments. If any parts or restraints are added for shipping, those parts must be clearly identified. Clear instructions shall be included as to when and how those parts/restraints are to be removed during the installation. Any special cautions and care to be exercised prior to opening the packaging shall be noted outside the packaging. Shipping groups shall be suitable for shipment by truck, rail or ship. Shipping groups shall be bolted to skids and suitable for loading, unloading, and handling with a fork truck. Each shipping group shall be equipped with lifting provisions for handling by crane. Accessories shall be packaged and shipped separately.Equipment unloading, handling, storage, and installation instructions shall be included with B.the packaging in such a manner that it can be easily located and accessed before unloading the equipment. Equipment shall be handled and stored in accordance with manufacturer’s instructions.C.

Operation and Maintenance Manuals1.09Equipment operation and maintenance manuals shall be provided with each assembly A.shipped, and shall include instruction leaflets and instruction bulletins for the complete assembly and each major component.

ProductsPART 1

Manufacturers1.01Eaton ElectricalB.___________C.___________D.

The listing of specific manufacturers above does not imply acceptance of their products that do not meet the specified ratings, features and functions. To eliminate possible disputes between circuit breaker and switchgear coordination, the manufacturer of the switchgear shall also be the manufacturer of the circuit breaker. Manufacturers listed above are not relieved from meeting these specifications in their entirety. Products in compliance with the specification and manufactured by others not named will be considered only if pre-approved by the Engineer ten (10) days prior to bid date.

Switchgear and circuit breaker details1.02The switchgear described in this specification shall be designed for operation on Medium A.Voltage supply up to and including 24 kV 50/60 Hz. Specific voltage rating is shown on the contract drawings and the Project Data Sheets.The switchgear main bus (when applicable) shall be rated at 1250 / 2000 / 2500 / 3150 / B.4000 A as listed on the drawings. Busbars at 4000 A can have fan assisted cooling. All busbars are to be insulated either by heat shrink sleeves or by application of an epoxy coating. Busbars shall be continuously rated over their entire length.The switchgear shall be constructed so that all busbars, bus supports and connections shall C.withstand stresses that would be produced by fault currents equal to the close and latch rating of the circuit breakers. The short circuit current withstand capability of the switchgear busbars and vacuum circuit breaker shall be for duration of 3 seconds. The actual rating of the required short circuit withstand shall be on the contract drawings but shall be either: 25 kA-3 s; 31.5 kA – 3 s; 40 kA – 3 s; 50 kA - 3s for 12 kV and 17.5 kV systems and 20 kA-3s; 25 kA- 3 s for 24 kV systems.Where shown on the contract drawings integral earth switches shall be provided for each D.cable circuit. The earth switch shall have the same short circuit rating as the main bus with the following exception: If a 50 kA-3s rating is required then the earth switch will be rated at 50 kA-1s. Earthing switches shall be of the fault making type. Earthing switches can be mounted in the cable compartment for cable earthing, in a special busbar earthing panel or on a busbar earthing truck for busbar earthing. Optionally the earthing switch can be provided with a locking coil which prevents operation at de-energised coil.


Internal Arc Classification testing shall have been carried out on all ratings and shall be E.confirmed by Reports of Performance by a third party certification laboratory. A copy of which shall be provided with the tender document. The rating of the internal arc shall match the short circuit withstand rating of the busbars but for a duration of 1 second for 25kA, 31.5 kA, 40 kA, and for 0.5 s for 50 kA rated systems. Internal Arc testing shall be carried out in the 3 main compartments of the Switchgear – Cable Compartment, Vacuum Circuit Breaker Compartment and Busbar Compartment. The propagation of the fault to adjacent compartments or sections of the switchgear shall not be permitted.Segregation barriers shall be provided between the busbar compartments of adjacent vertical F.sections.The temperature rise of the switchgear assembly shall be in accordance with IEC 62271-200 G.and for the vacuum circuit breaker IEC 62271-100 and be proven and documented by type tests. Test certificates shall be submitted with the tender.Current transformers are cast-resin insulated and comply with IEC60044-1.Current H.transformers shall be mounted in the cable compartment near the cable terminals. The secondary circuit is to be wired up to terminals in the low voltage compartment. The low voltage cabling shall be fully segregated from any primary voltage by earth metal partitions/channels, short distances of low voltage cables are permitted to run in non-metalic conduit for example secondary wiring from CTs. Earthing and short-circuiting the current transformer circuits shall be done in the low voltage compartment. Where shown on the Project Data Sheets it is permissible to use Low Voltage wire wound CTs provided adequate provision is made for screening and earthing the CT primary conductor.All secondary wiring from the CTs shall be terminated in the Low Voltage compartment I.where they will be provided with shorting links.Voltage transformers are cast-resin insulated and can be mounted on the following ways: J.

In the cable compartment near the cable terminals, direct connected, for 1.measuring the cable voltage. Connection shall be via removable high voltage fuses.

On the withdrawable voltage measuring truck, direct connected, for measuring 2.the busbar voltage. Connection shall be via high voltage fuses mounted on the measuring truck.

In the cable compartment, with high voltage flexible connection cables to the 3.Busbar Compartment to measure busbar voltage. Connection shall be via removable high voltage fuses.

Loss of Service Continuity classification: LSC-2BK.Partition Class: PM (all partitions without exception shall be earthed metal)L.Internal Arc Class: AFLRM.Accessibility of Compartments:N.

Busbar Compartment – Tool-Based / Non-Accessible1.Vacuum Circuit Breaker Compartment – Interlock Controlled2.Cabling Compartment – Procedure-Based / Tool-Based3.

Ingress Protection Degree in accordance with IEC 60529:O.External degree of protection: IP4X1.Internal degree of protection: IP2X2.

Indoor switchgear suitable for operation in -5 to +40 0C with relative humidity not exceeding P.95% in any 24 hour period.The switchgear shall be rated for operation at altitudes of up to 1000m without derating.Q.

Interlocks and safety measures1.03Vacuum Circuit Breaker Compartment shuttersA.

Partitions and shutters protection shall be IP 2X 1.Automatic safety shutters shall cover the circuit breaker fixed isolating contacts2.Shutters shall be individually operated by direct action of the circuit breaker 3.

withdrawable carriage.Shutters shall be opened and closed by a positive mechanical drive.4.Facilities shall be provided to padlock shutters closed.5.Means shall be provided to facilitate cable testing via the fixed isolating contacts 6.

by holding the cable side shutters open. .Shutters shall be coloured and labelled.7.


Live Side: (Busbar & Cable for incoming circuits) Red and labelled “Danger Live”a.Cable Side: Yellow and labelled “Cable”b.On Bus-Section panels both shutters shall be Red and labelled “Danger Live c.Busbars”

Mechanical interlocks shall be provided to prevent the following:B.It shall not be possible to rack the breaker in or out if the breaker is “CLOSED”. 1.

The vacuum circuit breaker should ‘OPEN’ automatically if the racking in or out procedure is attempted.

It shall not be possible to close the circuit breaker manually or electrically while it 2.is being racked in or out or while the breaker is in any position between the connected and the test/disconnected positions.

The door of the vacuum circuit breaker compartment being opened unless the 3.vacuum circuit breaker is in the ‘TEST’ (withdrawn) position.

Vacuum circuit breaker being ‘Racked In’ unless the compartment door is closed 4.and the vacuum circuit breaker is OPEN.

Secondary contact plugs and socket shall not be able to be unplugged unless 5.the vacuum circuit breaker is in the ‘TEST’ position.

It shall not be possible to insert the circuit breaker into the connected position if 6.the circuit breaker control wiring connector is not properly engaged with its compartment control wiring connector. Interlocking shall also be provided to prevent disconnection of circuit breaker control wiring connector (manually or automatically) while the circuit breaker is in the connected position or in any position between the connected and the test/disconnected.

Padlock facilities shall be provided for the following:C.Safety shutters closed (separate facility for busbar and circuit shutters)1.Earthing switches closed2.

Construction1.04The switchgear assembly shall consist of completely metal-enclosed, dead front vertical A.sections requiring only front access for connection, maintenance and operation of the switchgear and containing various combinations of circuit breakers and auxiliaries of rating and type noted on the drawings or specified herein.The switchgear shall be constructed from a minimum of 2mm galvanised sheet steel with pre-B.treatment and polyester powder paint finish as per the manufacturer’s standard colour.The front of each panel, and the end covers of each switchboard shall be finished with a C.polyester powder coat, where the thermosetting powder is applied to the sheet steel electrostatically with an average layer of minimum fifty micrometers. Before the powder coating is applied, the sheet steel parts shall be degreased and coated with a phosphate layer with 0.4 to 0.8 g/m² iron phosphate.

The technical data for the powder coating will be:1.base : epoxy polyester resina.colour : RAL7035/RAL7016b.degree of shine : 60 à 70% according to Lange 60 degreesc.sg : 1.53 g/cm³d.adhesion : glass test DIN53151 (Gto)e.elasticity : buckling test DIN53156f.salt spray test : ASTM 400 hoursg.

Unless otherwise stated on the Contract Drawings or Project Data Sheet, the switchgear D.shall be front accessible such that it can be installed against the wall, and shall not require rear access for its maintenance, inspection, or operation. Primary bus joints and supports that are not accessible from the front are to be designed such that no maintenance is necessary for those joints or supports. All necessary access for owner’s primary cable terminations, joining of main and ground bus joints at shipping splits, and termination of control wires shall be provided from the front or top of the switchgear. Access to any medium-voltage cable or bus connection shall be through removable panels E.requiring the use of tools and shall be marked with caution signs to indicate the presence of energized conductors behind them.


All low voltage devices and their associated control wiring shall be isolated by grounded F.metal barriers from primary circuits with the exception of short lengths of wires such as at instrument transformer and space heater terminals. Space heaters shall be supplied when noted on the drawings or specified herein.Each circuit breaker shall have two positions within its compartment, with compartment door G.closed: ‘TEST’ and ‘CONNECTED’.

In the ‘TEST’ position, no primary high voltage contacts shall be made and the 1.safety shutters automatically close over the stationary high voltage contacts in the compartment. The secondary control wiring can remain connected so that the breaker can be opened or closed electrically or manually.

In the ‘CONNECTED’ position, the circuit breaker shall be in the normal 2.operating position inside the compartment, with safety shutters fully opened, and primary and secondary connections fully made.

Two cell position switches shall be provided in each circuit breaker compartment. 3.One switch shall change its state when breaker is moved to connected position, and the other switch shall change its state when breaker is moved to test position to provide remote indication of the position of the vacuum circuit breaker.

Where shown on the Project Data Sheet the vacuum circuit breaker shall have 4.the provision for remote racking by motor mechanism to and from the ‘TEST’ and ‘CONNECTED’ positions.

It shall be possible to manually OPEN and CLOSE the vacuum circuit breaker 5.with the compartment door closed. Manually charging the spring charging mechanism shall only be possible with the vacuum circuit breaker in the ‘TEST’ position and the compartment door open.

Vacuum Circuit Breaker 1.05Circuit breakers shall utilize vacuum interrupters for interruption and switching functions. A.Each vacuum interrupter shall be totally encapsulated in epoxy insulation forming a composite encapsulated pole unit. The vacuum interrupter shall be cast into the epoxy pole unit as part of an integrated manufacturing process, bolting of a separate loose vacuum interrupter into the epoxy housing is not permitted. Three identical pole units will be proved for each vacuum circuit breaker. The current transfer between the circuit breaker and primary circuits conductors in the compartment shall be via heavily silver plated and spring loaded copper finger cluster (primary disconnect) on the breaker, and rigidly mounted silver plated copper stabs within the insulated housing mounted on the compartment wall. Each circuit breaker shall be equipped with high-speed stored energy operating mechanism B.and shall permit open-close-open (OCO) operating sequence without recharging the closing springs. The operating sequence will be O-0.3s-CO-15s-CO. The type test certificate of the vacuum circuit breaker shall be submitted to confirm this requirement. The breaker front panel shall be removable when the compartment door is open for ease of C.inspection and maintenance of the mechanism.Each circuit breaker shall be equipped with mechanical operations counter on the front of the D.breaker to provide record of the number of circuit breaker operations.Each circuit breaker shall include mechanical flag indicators for Open/Close and spring E.Charged/Discharged status indications on the front of the breaker.Each circuit breaker shall include auxiliary contacts to provide remote indication of ‘Spring F.Charged’ status.Each circuit breaker shall be supplied with an auxiliary switch with 5 NO and 5 NC contacts. G.The switch shall be heavy duty, double break type with wipe type contacts. All unused contacts from this switch shall be wired out to terminal blocks for owner’s use. Where shown on the Contract Drawings and needed for the control of the system it shall be possible to add an additional 5 NO and 5NC contacts to each circuit breaker.Circuit breakers shall be manually operated (MO) unless shown on the drawings as H.electrically operated (EO). Energy required for closing and opening of the circuit breaker shall be provided by manual charging of springs. The spring charging handle shall be integral to the breaker and conveniently located on the front of the circuit breaker.


Each circuit breaker shall be supplied with Manual “ON” and “OFF” push buttons located on I.the front of the circuit breaker for opening and closing the breaker manually, without a need for external control power.Where indicated on the drawings as EO, each circuit breaker shall be electrically operated. J.Energy required for closing and opening of the circuit breaker shall be provided by charging of springs by an electrical motor. Electrical closing/opening of the circuit breaker shall be accomplished by energizing spring release coil/shunt trip coil. The control voltage required for electrical operation of the breakers shall be derived from an external source unless otherwise stated the voltage rating will be shown on the contract drawings and or the Project Data Sheets.

Data Sheet for withdrawable MV SwitchgearTag Number: Client:


Swbd Title: Site:

Environmental Conditions Power SystemLocation: Indoor Supply Volts: 12 kV

Ambient Temp: -5 to + 40OC Frequency: 50 HzHumidity: 95% max BIL (kV): 75 kV

Hazardous Area: Non-Hazardous Earthing: Low resistance earthing

Particulars of Equipment - General Data Units RequirementsSwitchgear Specification / Standard Compliance IEC 62271-200Type Air Insulated – Metal EnclosedSystem Voltage kV 12Rated Frequency Hz 50Number of Phases 3Rated lightning impulse withstand voltage kV peak 75Dielectric withstand voltage to earth & between phases

kV (1min) 28

System rated short time withstand current kA – 3s [25] / [31.5] / [40] System rated peak withstand current kA [66] / [80] / [100] Earth Switch short time withstand current kA – 3s [25] / [26.3] / [31.5] / [40]

Loss of Service Continuity LSC 2BPartition Class PMInternal Arc Classification AFLRInternal Arc Rating kA-1s [25] / [31.5] / [40] Accessibility of Compartments

Cable Compartment Tool-based] / Procedure-basedCircuit Breaker Compartment Interlock-controlled / [Tool-based

Busbar Compartment Non-accessible Rated normal Busbar current A [1250], [2000], [2500], [3150], [4000]Individual phase insulated Busbars YesIndividual Section Busbar compartment segregation

Yes

Future Busbar extension Yes from either or both endsIngress Protection (IP Classification) IP IP4X External and IP2X Internal

Circuit Breaker Specification / Standard Compliance

IEC 62271-100

Circuit Breaker Type Vacuum only Individual Phase Switching Encapsulated Pole Unit with integral cast

Vacuum InterrupterRacking in Mechanism Manual / Electrical OperationOperating Sequence O-0.3s-CO-15s-COControl Circuit Supply Voltage V 110 / 120 / 220 / 240 VAC / 50 / 60 HZ,

24 / 48 / 60 VDC, 110 / 125 VDC, 220 / 250 VDC

Mechanical Endurance M2Electrical Endurance E2Capacitance Switching C1 (C2 for 400 A multi-bank capacitor

switching


Data Sheet withdrawable for MV SwitchgearSpecific Switchgear Details Qty Rating

Main Incoming Vacuum Circuit Breaker Section

[630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A] / [2000 A] / [2500 A] / [3150 A] / [4000 A]

Cable Voltage Detection System [Yes] / [No]Incoming Cable-side Voltage Transformer [Yes] / [No]Protection Class CTs [Yes] / [No]Metering Class CTs [Yes] / [No]Cable-side Earth Switch [Yes] / [No]Manual or Electrically Operated Breaker [Manual] / [Electrical] (insert voltage)Motor Operated Remote Racking Mechanism [No] / [Yes] (insert motor voltage)Cell Breaker Position Switches 4A / 4B [Yes] / [No]Breaker Spring Charge Status Switches wired to terminals in LV Compartment

[Yes] / [No]

Breaker Auxiliary Contacts wired to terminals 5A / 5B [Yes] / [No]Protection Requirements

Bus-Section (bus-tie) with Riser [630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A] / [2000 A] / [2500 A] / [3150 A] / [4000 A]

Busbar Earth SwitchBusbar Voltage TransformerManual or Electrically Operated Breaker Manual / Electrical (insert voltage)Motor Operated Remote Racking Mechanism [No] / [Yes] (insert motor voltage)Cell Breaker Position Switches 4A / 4B [Yes] / [No]Breaker Spring Charge Status Switches wired to terminals in LV Compartment

[Yes] / [No]

Breaker Auxiliary Contacts wired to terminals 5A / 5B [Yes] / [No]Riser AccessoriesRiser on Left or Right of Sectionaliser Right / LeftRiser – Disconnect Truck [Yes] / [No]Riser – Earthing Truck [Yes] / [No]Riser – Voltage Transformer Truck [Yes] / [No]

Feeder Vacuum Circuit Breaker Section 630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A] / [2000 A] / [2500 A] / [3150 A] / [4000 A]

Cable Voltage Detection System [Yes] / [No]Incoming Cable-side Voltage Transformer [Yes] / [No]Protection Class CTs [Yes] / [No]Metering Class CTs [Yes] / [No]Cable-side Earth Switch [Yes] / [No]Manual or Electrically Operated Breaker [Manual] / [Electrical] (insert voltage)Motor Operated Remote Racking Mechanism No / Yes (insert motor voltage)Cell Breaker Position Switches 4A / 4B [Yes] / [No]Breaker Spring Charge Status Switches wired to terminals in LV Compartment

[Yes] / [No]


Feeder Vacuum Circuit Breaker Section [ 630 A] / [800 A] / [1000 A] / [1250 A] / {1600 A] / [2000 A] / [2500 A] / [3150 A] / [4000 A]


Cable Voltage Detection System [Yes] / [No]Incoming Cable-side Voltage Transformer [Yes] / [No]Protection Class CTs [Yes] / [No]Metering Class CTs [Yes] / [No]Cable-side Earth Switch [Yes] / [No]Manual or Electrically Operated Breaker [Manual] / [Electrical] (insert voltage)Motor Operated Remote Racking Mechanism [No] / [Yes] (insert motor voltage)Cell Breaker Position Switches 4A / 4B [Yes] / [No]Additional Breaker Auxiliary Contacts wired to terminals

5A / 5B [Yes] / [No]

Protection Requirements

Feeder Vacuum Circuit Breaker Section [630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A] / [2000 A] / [2500 A] / [3150 A] / [4000 A]

Cable Voltage Detection System [Yes] / [No]Incoming Cable-side Voltage Transformer [Yes] / [No]Protection Class CTs [Yes] / [No]Metering Class CTs [Yes] / [No]Cable-side Earth Switch [Yes] / [No]Manual or Electrically Operated Breaker [Manual] / [Electrical] (insert voltage)Motor Operated Remote Racking Mechanism [No] / [Yes] (insert motor voltage)Cell Breaker Position Switches 4A / 4B [Yes] / [No]Breaker Spring Charge Status Switches wired to terminals in LV Compartment

[Yes] / [No]


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