prysmian- cable syst.pdf

MediumVoltage Cables

Medium Voltage Systems

A worldwide leading player in the cable industry

As a leading player in the high technology business of energy and telecom cables & systems, the Prysmian group has a strong position in higher added value market segments. It develops, designs, produces, supplies and installs a wide range of cables addressing the most diverse applications in both the energy and telecoms sectors.

Specialising in the development of products and systems designed on the basis of clients’ specific requirements, Prysmian’s main competitive strengths include its focus on research and development (over 3,000 granted and filed patents overall), the ability to innovate its products and production processes, and the use of its own advanced proprietary technologies.

Cables from Delft

With cable manufacturing experience since 1913, Prysmian Cables and Systems B.V. designs, manufactures, distributes and installs a wide range of cables and systems for the transmission and distribution of power at low, medium, high and extra high voltage for both land and submarine applications and for special industrial applications, together with a wide range of accessories for applications all over the world.

Prysmian Cables and Systems B.V. initiated and patented pioneering developments related to extruded cable systems, such as the pre-fabricated stress cone and joint body (1965), the in-line cross-linking of extruded cables (1970), the Click-Fit accessories range (1990), the introduction of the environmentally friendly HPTE (High-performance Polypropylene Thermoplastic Elastomer) insulated medium voltage cables in the Netherlands (2010) and the production of HVDC land cables (2011) to name but a few.

Furthermore Prysmian Cables and Systems B.V. can offer extended after sales Services such as:- 24/7 Emergency and Condition Based

Maintenance;- On-site Fault Localization;- Diagnostics and Assessments;- Material Qualification;- Testing in our own HV Laboratory.

A global presence

With its two businesses, Energy Cables and Systems (cables and systems for underground and submarine power transmission and distribution, for industrial applications and for the distribution of electricity to residential and commercial buildings) and Telecom Cables and Systems (optical cables and fibres and copper cables for video, data and voice transmission), Prysmian boasts a global presence with subsidiaries in 35 countries, 54 plants in 21 countries, 7 Research and Development centres in Europe, USA and South America and employs more than 12,000 people worldwide. This broad and diverse geographical distribution of manufacturing facilities allows Prysmian to respond more efficiently and effectively to the needs of local markets and customers.

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Environment and sustainability

Management of its business on an environmentally sustainable basis is not just an ethical commitment for the Prysmian Group but a key factor in its very business competitiveness. Prysmian is constantly seeking not only to develop products with an ever lower environmental impact, but also to implement management and production processes that help improve the environmental sustainability of its business.

In keeping with the contents of the specific policy document, approved and supported by the Chief Executive Officer in 2007, since then Prysmian systematically and continuously pursued all the fundamental activities for managing issues relating to the environment and the health and safety of its employees, introducing a few improvements to the instruments used for fulfilling these tasks. Prysmian has also set up a special committee, the Environmental and Safety Committee (ESC), which acts at management level by deciding objectives for improvement on the basis of information provided by the Health Safety & Environment (HSE) department

The XLPE and HPTE cables produced at Prysmian Cables and Systems B.V. are environmentally friendly and safe to use. Furthermore the reduction of electrical and magnetic fields induced by the currents flowing through the conductors is minimized in smart system designs.

Prysmian sets high standards

Prysmian Cables and Systems B.V. is certified in accordance with ISO9001:2000 Quality and ISO 14001 Environmental Management System standards for its activities.

Prysmian products are designed to comply with all major national and international standards (e.g. NEN, IEC, CENELEC, BS, CEI, DIN VDE, ICEA, IRAM, NBR, NF, SABS, SFS, TSE, UNE, UTE, NBN, AEIC, ANSI, AS/NZS etc.) and with customer’s specific requirements.

Thanks to an undisputed expertise developed over decades in servicing all major utilities anywhere in the world, Prysmian relies on a long-standing tradition of participation and on a strong presence within international scientific bodies– IEC, CENELEC and AEIC among others – to develop relevant standards, technical recommendations and guidelines.

Innovation and quality

The objectives of Prysmian’s Research & Development function are identifying innovative products and technologies, introducing new products onto the market services designed to expand the range on offer, and cutting production costs.

The quality of Prysmian products is assured by means of strict monitoring of all phases of the production process, from raw material procurement to the delivered product, through a highly-developed control system for each specific phase of the cycle.

The controls during the raw material procurement stage concern supplier selection and quality checks of the individual supplies, which have to be accompanied by special certificates proving that they conform to the standards specified during the contractual phase. 3


Medium Voltage XLPE cable production

The extrusion and curing of XLPE insulated medium voltage cables is performed in three separate steps, i.e.:

In the first step, thermoplastic polyethylene with a catalyst already added to the mix is fed into the extruder. During this extrusion process the conductor-screen, insulation and insulation-screen are produced in one go inside the extrusion head. Then this combination of conductor and insulation is cooled to room temperature and placed on a drum.

In the second step this combination of conductor and insulation (called a core) is placed inside a water tank at 80ºC, where cross-linking occurs. The main advantages of this type of processing are high extrusion speed, low odour level, storage stability and low equipment costs.

In the third and last step the cable finishing is placed on the cable core. In case of medium voltage cables this is usually a copper wires screen and a polyethylene outer sheath.

Cable finishing

Prysmian Cables and Systems B.V. offers a wide variety of cable finishings based on customer’s requirements, which includes the following:

Single core medium voltage utility cables:- copper wires screen;- copper wires screen and laminated aluminium

foil; - copper wires screen and laminated copper foil.

Three core medium voltage utility cable:- copper wires screen.

Single core industrial medium voltage cables:- lead alloy sheath;- steel wire armouring;- steel tape armouring;- welded aluminium sheath;- aluminium wire armouring.

Three core industrial medium voltage cables:- lead alloy sheath;- steel wire armouring;- steel tape armouring.

Apart from the standard PE outer sheath the following optional finishing can be produced by Prysmian Cables and Systems B.V. as well: - LSOH outer sheath;- PVC outer sheath.

Some of the abovementioned finishings may also be combined, e.g.: Steel tape armour with a lead alloy sheath. If you have specific wishes concerning cable constructions and/or test regimes, please do not hesitate to contact us.

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Test regimes

As part of our quality system extensive tests areperformed to guarantee our products fulfil the highest demands. Type tests reveal our cable designs to be outstanding and routine and sample tests prove that our cables conform to the highest standards.

Type testsPrysmian Cables and Systems B.V. continuouslyperforms type tests on MV cables according to the following Dutch standard: Middenspanning kunststof (MS): NEN 3620 (2003), “Kabel geïsoleerd met vernet polyetheen voor spanningen van 6kV tot en met 30kV”. This document is based on CENELEC HD620 S2, Part 10, Section J.

Conductor types and range The conductor sizes mentioned in the tables are commonly used types.

The maximum conductor size per material and type is as follows:

The minimum conductor size per type and voltage class is as follows:

Special designs:- Large conductor cross-sections up to and

including 2500mm2 copper or aluminium Milliken constructions;

- Oxidized wires for copper conductors;- Large solid round aluminium conductors up to

and including 1600mm2;- Enamelled wires for copper conductors.

Copper Aluminium

Solid - 1600

Stranded 800 1600

Milliken 2500 2500

10kV and 15kV Copper Aluminium

Solid - 25

Stranded 35 95

20kV Copper Aluminium

Solid - 50

Stranded 35 95

30kV Copper Aluminium

Solid - 150

Stranded 95 95

Milliken 1000 1600

Please note that the requirements of the NEN 3620 are more severe and the test program is extended to include more tests than listed in IEC 60502-2.

Routine testsBesides offering special arrangements in accordance with customer requirements, each cable length is subjected to a final routine testing procedure based on NEN3620 before release, consisting of:- Measurement of the electrical resistance of the

conductor;- High voltage test;- Partial discharge test.

Insulation quality and life expectancy of a cable are related to the magnitude of partial discharges that might occur in a cable. The reliability of measuring results for these partial discharges greatly depends on the noise level caused by the surrounding environment. The discharge detection limit is improved by using an electromagnetically shielded room (Faraday’s-cage) for the execution of the partial discharge test.

Sample testsSample tests are performed in accordance withNEN3620 and/or customer requirements.

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P-LaserProduct evolution

During the years, after the undisputed supremacy held by impregnated paper, the evolution of insulation technologies and materials for Medium Voltage cables headed for extruded materials, at first thermoplastic PVC (soon given up because of reduced dielectric properties) and eventually cross-linked polyethylene. Introduced on the market in the early ‘80s, cross-linked polyethylene (XLPE), in particular, has completely replaced, since the early ‘90s, the still excellent impregnated paper insulation and is nowadays a fully consolidated technology, which relies on outstanding overall characteristics and performances (electrical, thermo-mechanical and installation) and a well-proven track record at all voltages. It appeared difficult, therefore, to find out something new, which could guarantee equivalent (if not improved) performances and introduce innovations and simplifications, given the technological goals achieved with XLPE.

Prysmian, in its capacity as innovation leader, has taken up the challenge put forward by a mature technology as XLPE.The Company has therefore developed, thanks to its R&D facilities and a know-how acquired in more than 130 years of activity, an equally reliable new technology, with excellent mechanical, electrical and physical features and properties: P-Laser.

The P-Laser technology, in addition to ensuring the same performances, the same excellent reliability and handling characteristics equivalent to the traditional XLPE cables, provides: - innovation for the network upgrading; - optimization of the Supply Chain and of the

Total Cost of Ownership; - full recyclability of the product with lower

environmental impact; - full compatibility of the cable with the existing

network and the standard accessories.

Furthermore, the product is conceived according to a modular architecture, which allows various design configurations depending on the specific customer’s requirements.

Benefits and main characteristics

Innovative product in terms of materials and production process:- High reliability and improved thermo-mechanical

performances;- On-line protection of cable core during

manufacturing process;Delivery time reduction and optimisation of Total Cost of Ownership:- Production process based on a single and

uninterrupted line;- No degassing treatment needed, due to the new

materials used;Eco-compatibility of the product and strong reduction of carbon footprint:- Fully recyclable materials and no gas emission

in the atmosphere;- Lower soil occupation and reduced power

consumption;Full compatibility with the existing electrical network and standard components.

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Industrial process

The product P-Laser uses a High Performance Polypropylene Thermoplastic Elastomer (HPTE) developed by Prysmian’s R&D laboratories and covered by patents and patent applications. P-Laser can be manufactured on a single and uninterrupted production line. Therefore, it is characterised by the complete product/process integration, which allows to significantly streamline the supply chain and to considerably reduce the factory lead time, thus providing customers with remarkable advantages in terms of service, in addition to the excellent intrinsic characteristics of the product itself. The P-Laser cable can also be produced according to different metallic screen and outer sheath configuration requirements.

Technical Specifications

XLPE HPTE

Operating temperature 90°C 90°C (up to 110°C)

Emergency temperature 105°C 130°C

Dielectric losses Tan∂(@90°C; 15 kV/mm) <5x10-4

Dielectric strength Excellent

Electrical Breakdown strength (AC, lightning impulse, after ageing)

Very good Excellent

Thermo-pressure resistance 105°C 130°C

Handling characteristics Good

Jointing and terminating techniques Standard

The specific layout of the production plant for P-Laser as it is shown here is based on Prysmian’s first P-Laser production facility and may not be representative for your local cable manufacturer”.

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Medium voltage accessories

For application on medium voltage cables, Prysmian offers a wide range of accessory types for indoor, outdoor or underground installation. These are simple and reliable solutions for jointing, termination and connection to electrical equipment, without requiring extensive jointers’ training.

Characteristic of the design is the use of prefabricated elements with integrated electrical functions that can be slid onto the prepared cable ends and need little additional installation work for completion.This design principle is realised by the use of modern high quality elastomeric materials with outstanding physical and electrical properties and the application of newly developed moulding techniques. The different accessories are composed of different types of Silicone rubber compounds, EPR-rubber and epoxy resin.

Operational reliability has been proven in numerous installations over the last 25 years. The accessories are available in standard insulation diameter ranges and supplied as jointing kits including installation instructions.

The know-how

In order to supply the full range of MV accessories, Prysmian uses a number of different manufacturing techniques at her own two production sites in Gron and Neuf Pré, where moulding, manufacturing and kitting of our medium voltage accessories is performed.The production of these accessories is but the first step in supplying our products to the customer. A very high standard of quality is ensured by Prysmian’s core competencies for medium voltage accessories:- Supply management;- Distribution & logistics;- Expert manufacturing;- Marketing;- Purchasing;- Product development;- Applications engineering.

Furthermore Prysmian has her own R&D team complete with a MV Laboratory for testing and is ISO 17025 certified.

Test regimesAs part of our quality system extensive tests are performed to guarantee our products fulfil the highest demands. Type tests reveal our accessory designs to be outstanding and routine tests prove that they conform to the highest standards.

All of the medium voltage accessories are type tested and routine tested in accordance with harmonisation document HD629.1 S1 ‘Test requirements on accessories for use on power cables of rated voltage from 3,6/6 (7,2) kV up to 20,8/36 (42) kV - part 1: Cables with extruded insulation’.

ServicePrysmian Cables and Systems B.V. has her own centre of competence. At this centre of competence we have engineering capacity, testing capacity and training courses with respect to medium voltage accessories in our own research laboratory and workshop.

If you have any questions relating to complete system supply of medium voltage systems, training or research, please contact us!

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Product port-folio

Our product port-folio consists of: MV joints, MV separable connectors, MV Bushings, MV Terminations and Airfield Lighting equipment. On this page you will find a selection of Prysmians premium products with a short description.

ElasconSeparable Connectors with a mechanical lug.- EPDM rubber connectors;- EPOXY Resin bushings;- Wide acceptance range for conductor sizes

(@ 24 kV, 1 model covers 25-95mm2 conductor size);- Available for 250A, 400A and 630A;- Compatible with CENELEC EN 50180 / EN 50181.

FormfitA well established and reliable range of Separable Connectors.- EPDM rubber connectors;- EPOXY Resin bushings;- A wide range (250A-400A-630A-1250 A);- Compatible with CENELEC EN 50180 /

EN50181.

InjectfitA well established and flexible range of injected taped joints.- Insulated within EPR rubber tapes;- Protected by EPOXY Resin (injected);- Wide range (1/C - 3/C - Branch joints - PILC);- Compatible with CENELEC HD 628/629.

Coldfit A range of cold-shrink silicone rubber terminations.- Monobloc Cold shrink design includes: sheds,

Stress relieving device, trifurcating gloves and transition tubes;

- 1/C and 3/C versions;- Range from 11 kV to 24 kV;- Indoor or Outdoor;- Easy to install.

ElasticfitA range of slip-on silicone rubber terminations.- Modular systems design includes sheds, earth

covers, stress relieve tubes and trifurcating gloves;- 1/C and 3/C versions;- Range from 11 kV to 52 kV;- Indoor or Outdoor;- Economic and reliable.

ElaspeedA fully integrated cold shrink joint design.- High reliability;- 1/C and 3/C versions;- Available from 11 kV to 35 kV (US);- Conductor sizes from 25 to 1000 mm2;- Suitable for Polymeric and PILC cables;- Available as branch joint;- Available as Transition joint;- Also used with shear bold connectors. 9


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Conductor

Conductor screen

Insulation

Insulation screen

Bedding material

Water blocking tapes

Copper wires screenwith counter helix

Metallic copper screen

Inner polymeric sheath

Lead sheath

Steel wire armour withsteel counter helix

Outer sheath

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EG-YLKrvlwd 3xCurs YMeKrvaslqwd 3xAlrm YMeKrvaslqwd 1xAlrs

Constructional data:

Rated voltages: Uo/U /Um: 6/10/12 kV Nominal insulation thickness: 3.4 mm

Nominal cross section of the conductor: * * * * * * * *

Alrm mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 - - 95 120 150 185 240 300 400 500 630 800 1000 1200

Curs mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 -

Outer diameter stranded conductor (Aluminium or copper) mm 25 27 29 30 32 34 36 38 42 45 49 53 57 61

Outer diameter solid conductor (Aluminium only) mm 25 26 28 29 31 32 35 37 40 43 47 50 53 56

Net weight, aluminium conductor (stranded and solid) kg/m 0.7 0.8 0.9 1.0 1.2 1.4 1.6 1.8 2.2 2.6 3.1 3.3 3.9 4.6

Net weight, copper conductor (stranded only) kg/m 1.1 1.3 1.6 1.9 2.2 2.6 3.2 3.8 4.8 5.9 7.2 10.0 12.3 -

Minimum bending radius: during laying (stranded conductors) m 0.5 0.55 0.61 0.65 0.7 0.75 0.82 0.88 0.98 1.07 1.19 1.32 1.45 1.56

Minimum bending radius: installed (stranded conductors) m 0.4 0.44 0.49 0.52 0.56 0.6 0.65 0.71 0.79 0.86 0.95 1.06 1.16 1.25

Minimum bending radius: during laying (solid aluminium conductors) m 0.49 0.53 0.58 0.62 0.67 0.7 0.78 0.84 0.97 1.01 1.12 1.22 1.32 1.42

Minimum bending radius: installed (solid aluminium conductors) m 0.39 0.42 0.46 0.49 0.53 0.56 0.63 0.67 0.78 0.81 0.9 0.98 1.06 1.14

Electrical properties:

Approximate reactance per phase@50Hz

Trefoil touching Ω/km 0.128 0.121 0.115 0.111 0.108 0.104 0.100 0.128 0.121 0.115 0.111 0.108 0.104 0.100

Trefoil ducts, touching Ω/km 0.231 0.220 0.209 0.202 0.194 0.187 0.179 0.231 0.220 0.209 0.202 0.194 0.187 0.179

FlatTouching Ω/km 0.143 0.135 0.129 0.125 0.123 0.119 0.115 0.143 0.135 0.129 0.125 0.123 0.119 0.115

FlatCables spaced Ω/km 0.186 0.178 0.172 0.168 0.165 0.161 0.157 0.186 0.178 0.172 0.168 0.165 0.161 0.157

FlatDucts, touching Ω/km 0.171 0.165 0.160 0.154 0.151 0.147 0.143 0.171 0.165 0.160 0.154 0.151 0.147 0.143

Operating capacitance@10kV and 50Hz µμF/km 0.26 0.29 0.32 0.35 0.38 0.41 0.46 0.26 0.29 0.32 0.35 0.38 0.41 0.46

Charging current@10kV and 50Hz A/km 0.47 0.53 0.58 0.63 0.69 0.74 0.83 0.47 0.53 0.58 0.63 0.69 0.74 0.83

10 kV single core medium voltage cables

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* preferred cross-sections



Rated voltages: Uo/U /Um: 8.7/15/18 kV Nominal insulation thickness: 4.5 mm


Alrm mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 - - 95 120 150 185 240 300 400 500 630 800 1000 1200

Curs mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 -


Outer diameter solid conductor (Aluminium only) mm 27 28 30 31 33 34 37 39 42 45 49 52 55 59

Net weight, aluminium conductor (stranded and solid) kg/m 0.8 0.9 1 1.1 1.3 1.5 1.7 1.9 2.3 2.8 3.3 3.4 4.1 4.8

Net weight, copper conductor (stranded only) kg/m 1.2 1.4 1.7 2.0 2.3 2.7 3.3 3.9 4.9 6.1 7.4 10 13 -



Minimum bending radius: during laying (solid aluminium conductors) m 0.52 0.56 0.61 0.65 0.7 0.73 0.81 0.87 0.96 1.04 1.15 1.24 1.35 1.45

Minimum bending radius: installed (solid aluminium conductors) m 0.42 0.45 0.49 0.52 0.56 0.59 0.65 0.7 0.76 0.84 0.92 0.99 1.08 1.16











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Alrm mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 - - 95 120 150 185 240 300 400 500 630 800 1000 1200

Curs mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 -


Outer diameter solid conductor (Aluminium only) mm - - 32 33 35 36 39 41 43 47 51 54 57 61

Net weight, aluminium conductor (stranded and solid) kg/m - - 1.1 1.2 1.4 1.6 1.8 2.1 2.5 3 3.5 3.6 4.3 5.0

Net weight, copper conductor (stranded only) kg/m 1.3 1.5 1.8 2.1 2.4 2.8 3.4 4.0 5.0 6.2 7.6 10 13 -



Minimum bending radius: during laying (solid aluminium conductors) m - - 0.64 0.68 0.73 0.76 0.84 0.9 0.97 1.07 1.18 1.27 1.38 1.48

Minimum bending radius: installed (solid aluminium conductors) m - - 0.51 0.54 0.58 0.51 0.67 0.72 0.78 0.86 0.95 1.02 1.11 1.19











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Rated voltages: Uo/U /Um: 18/30/36 kV Nominal insulation thickness: 8 mm

Nominal cross section of the conductor: * * * * * * *

Alrm mm2 - - 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 95 120 150 185 240 300 400 500 630 800 1000 1200

Curs mm2 95 120 150 185 240 300 400 500 630 800 1000 -

Outer diameter stranded conductor (Aluminium or copper) mm 39 39 42 44 46 48 52 55 59 62 67 70

Outer diameter solid conductor (Aluminium only) mm - - 41 43 46 47 51 53 57 59 62 66

Net weight, aluminium conductor (stranded and solid) kg/m 1.2 1.3 1.8 2.0 2.2 2.6 3 3.4 3.9 4.0 4.7 5.4

Net weight, copper conductor (stranded only) kg/m 1.9 2.4 2.8 3.2 3.8 4.5 5.5 6.6 8.0 11 13 -

Minimum bending radius: during laying (stranded conductors) m 0.76 0.78 0.85 0.9 0.97 1.03 1.13 1.22 1.34 1.46 1.59 1.70

Minimum bending radius: installed (stranded conductors) m 0.60 0.62 0.68 0.72 0.77 0.83 0.91 0.98 1.07 1.17 1.27 1.36

Minimum bending radius: during laying (solid aluminium conductors) m - - 0.82 0.87 0.95 0.99 1.09 1.16 1.27 1.35 1.46 1.56

Minimum bending radius: installed (solid aluminium conductors) m - - 0.65 0.69 0.76 0.79 0.87 0.93 1.02 1.08 1.17 1.25



Trefoil touching Ω/km 0.133 0.129 0.125 0.121 0.115 0.111 0.108 0.104 0.100 0.096 0.092 0.089

Trefoil ducts, touching Ω/km 0.211 0.203 0.195 0.188 0.18 0.173 0.164 0.156 0.149 0.142 0.135 0.129

FlatTouching Ω/km 0.148 0.143 0.140 0.135 0.13 0.126 0.122 0.118 0.115 0.112 0.109 0.107

FlatCables spaced Ω/km 0.190 0.186 0.182 0.177 0.172 0.168 0.163 0.159 0.156 0.153 0.150 0.148

FlatDucts, touching Ω/km 0.176 0.172 0.168 0.163 0.158 0.153 0.149 0.145 0.142 0.139 0.135 0.133

Operating capacitance@30kV and 50Hz µ μF/km 0.18 0.19 0.20 0.21 0.23 0.25 0.28 0.30 0.34 0.37 0.40 0.43

Charging current@30kV and 50Hz A/km 0.98 1.03 1.09 1.14 1.25 1.36 1.52 1.63 1.85 2.01 2.20 2.37


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10 kV three-core unarmoured medium voltage cables



Nominal cross section of the conductor: * * * *

Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240

Outer diameter stranded conductor (Aluminium or copper) mm 48 52 56 59 62 66 71

Outer diameter solid conductor (Aluminium only) mm 47 51 54 57 60 63 68

Net weight, aluminium conductor (stranded and solid) kg/m 2.4 2.5 2.6 3.0 3.4 3.9 4.6

Net weight, copper conductor (stranded only) kg/m 3.5 4.0 4.7 5.7 6.7 8.2 10

Minimum bending radius: during laying (stranded conductors) m 0.68 0.74 0.81 0.86 0.92 0.99 1.08

Minimum bending radius: installed (stranded conductors) m 0.57 0.62 0.68 0.72 0.77 0.82 0.90

Minimum bending radius: during laying (solid aluminium conductors) m 0.66 0.72 0.78 0.83 0.88 0.94 1.02

Minimum bending radius: installed (solid aluminium conductors) m 0.55 0.60 0.65 0.69 0.73 0.78 0.85


Approximate reactance per phase@50Hz Ω/km 0.114 0.107 0.102 0.099 0.096 0.093 0.089

Operating capacitance per phase @10kV and 50Hz Ω/km 0.24 0.28 0.31 0.34 0.36 0.4 0.44

Charging current @10kV and 50Hz Ω/km 0.44 0.51 0.56 0.62 0.65 0.73 0.80

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Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240




Net weight, copper conductor (stranded only) kg/m 3.7 4.3 5.0 5.9 7.0 8.5 10.4









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Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240




Net weight, copper conductor (stranded only) kg/m 4.1 4.7 5.5 6.4 7.5 9.0 11.0









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Nominal cross section of the conductor: * * *

Alrm mm2 - - 150 185 240

Alrs mm2 95 120 150 185 240

Curs mm2 95 120 150 185 240

Outer diameter stranded conductor (Aluminium or copper) mm 77 80 83 87 92

Outer diameter solid conductor (Aluminium only) mm - - 81 84 89

Net weight, aluminium conductor (stranded and solid) kg/m 4.1 4.5 5.1 5.7 6.5

Net weight, copper conductor (stranded only) kg/m 6.3 7.3 8.4 9.9 12

Minimum bending radius: during laying (stranded conductors) m 1.06 1.11 1.17 1.24 1.32

Minimum bending radius: installed (stranded conductors) m 0.88 0.93 0.97 1.03 1.10

Minimum bending radius: during laying (solid aluminium conductors) m - - 1.13 1.19 1.27

Minimum bending radius: installed (solid aluminium conductors) m - - 0.94 0.99 1.06


Approximate reactance per phase@50Hz Ω/km 0.123 0.119 0.115 0.111 0.108

Operating capacitance per phase @30kV and 50Hz Ω/km 0.17 0.18 0.19 0.21 0.24

Charging current @30kV and 50Hz Ω/km 0.93 0.98 1.03 1.14 1.31

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Industrial 10 kV three-core armoured medium voltage cables




Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240

Outer diameter STA mm 53 56 61 64 68 72 77

SWA mm 56 60 64 68 71 75 82

STA+Pb mm 57 60 65 68 72 76 81

SWA+Pb mm 60 64 68 72 75 79 86

Net weight, aluminium conductor (stranded and solid) STA kg/m 3.0 3.5 4.1 4.8 5.1 5.9 6.9

Net weight, copper conductor (stranded only) STA kg/m 3.9 4.8 5.9 7 7.9 9.3 11.4

Net weight, aluminium conductor (stranded and solid) SWA kg/m 4.7 5.3 6.1 6.8 7.3 8.2 10.4

Net weight, copper conductor (stranded only) SWA kg/m 5.6 6.6 7.9 9.0 10.1 11.6 14.9

Net weight, aluminium conductor (stranded and solid) STA+Pb kg/m 3.5 4.1 4.7 5.5 5.8 6.6 7.7

Net weight, copper conductor (stranded only) STA+Pb kg/m 4.4 5.4 6.5 7.7 8.6 10.0 12.2

Net weight, aluminium conductor (stranded and solid) SWA+Pb kg/m 5.2 5.9 6.7 7.5 8.0 8.9 11.2

Net weight, copper conductor (stranded only) SWA+Pb kg/m 6.1 7.2 8.5 9.7 10.8 12.3 15.7

Minimum bending radius: during laying m 0.7 0.76 0.83 0,89 0.94 1.01 1.10

Minimum bending radius: installed m 0.56 0.61 0.66 0.71 0.75 0.8 0.88





STA =Steel Tape Armour SWA =Steel Wire Armour Pb =Lead Alloy Sheath

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Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240


SWA mm 62 65 70 73 76 82 88

STA+Pb mm 62 66 70 74 77 81 87

SWA+Pb mm 66 69 74 77 80 86 92

Net weight, aluminium conductor (stranded and solid) STA kg/m 3.5 4 4.7 5.4 5.8 6.6 7.7

Net weight, copper conductor (stranded only) STA kg/m 4.4 5.3 6.5 7.6 8.6 10 12.2

Net weight, aluminium conductor (stranded and solid) SWA kg/m 5.4 5.9 6.8 7.6 9 10.1 11.4






Minimum bending radius: during laying m 0.77 0.82 0.89 0.95 1 1.07 1.16







20






Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240


SWA mm 67 70 75 79 83 87 93

STA+Pb mm 67 71 75 78 83 86 93

SWA+Pb mm 71 74 79 83 87 91 97

Net weight, aluminium conductor (stranded and solid) STA kg/m 3.8 4.5 5.2 5.9 6.3 7.2 9.1

Net weight, copper conductor (stranded only) STA kg/m 4.9 5.8 7.0 8.1 9.1 10.6 13.6

Net weight, aluminium conductor (stranded and solid) SWA kg/m 5.0 6.1 7.5 9.2 9.8 10.9 12.3






Minimum bending radius: during laying m 0.82 0.86 0.95 1.01 1.07 1.13 1.22







21






Nominal cross section of the conductor: * * *

Alrm mm2 - - 150 185 240

Alrs mm2 95 120 150 185 240

Curs mm2 95 120 150 185 240

Outer diameter STA mm 86 88 91 95 102

SWA mm 88 91 95 99 106

STA+Pb mm 90 92 95 99 106

SWA+Pb mm 92 95 99 103 110

Net weight, aluminium conductor (stranded and solid) STA kg/m 8.0 8.2 8.7 9.7 11.7

Net weight, copper conductor (stranded only) STA kg/m 9.5 10.4 11.5 13.1 15.2

Net weight, aluminium conductor (stranded and solid) SWA kg/m 10.2 10.9 11.7 13 14.5

Net weight, copper conductor (stranded only) SWA kg/m 12.5 13.4 14.5 16.4 18.6

Net weight, aluminium conductor (stranded and solid) STA+Pb kg/m 8.6 9.1 9.7 10.7 12.8

Net weight, copper conductor (stranded only) STA+Pb kg/m 10.4 11.3 12.5 14.1 16.3

Net weight, aluminium conductor (stranded and solid) SWA+Pb kg/m 10.9 11.8 12.7 14.0 15.6

Net weight, copper conductor (stranded only) SWA+Pb kg/m 13.4 14.3 15.5 17.4 19.7

Minimum bending radius: during laying m 1.11 1.15 1.2 1.27 1.37

Minimum bending radius: installed m 0.89 0.92 0.96 1.01 1.10


Approximate reactance per phase@50Hz Ω/km 0.123 0.119 0.115 0.111 0.108

Operating capacitance per phase @30kV and 50Hz Ω/km 0.17 0.18 0.19 0.21 0.24

Charging current @30kV and 50Hz Ω/km 0.93 0.98 1.03 1.14 1.31


22


Using the tables

Current ratingsThe continuous current ratings mentioned in the tables are based on standards IEC-60502-2 and NPR3626. Both of these mentioned standards contain current rating information and the cal-culation methods of both standards are based on IEC60287. However, the assumptions for the current rating calculations in accordance to IEC60502-2 are different than the assumptions for standard NPR3626.

Electrical propertiesThe electrical properties and continuous current ratings apply to single core, three core, unarmou-red and armoured cables where applicable, with the mentioned copper wire screen surface area. The total surface area of the copper wires screen may be adjusted to fit the required single phase short-circuit rating.

Cyclic loadingWhere loading is cyclic, appreciable increase in current capacities may be justified. Please refer to IEC Publication 60853 for calculation of the cyclic ratings.

CharacteristicsImpedances, such as positive and negative se-quence impedances and zero sequence impedance are strongly depending on laying configuration, metallic sheath bonding and other conductive ele-ments parallel to the cable route. The mentioned impedances are therefore indicative only and should be calculated per situation and confirmed by measurements after circuit completion.

23


IEC60502-2A separate group of three single core cables may be continuously loaded in accordance with the ap-propriate tables if the following assumptions are fulfilled.

Assumptions:• Ratings apply to three-phase group(s) of single

or three core cables;• Maximum permissible temperature of the inner

conductor during continuous use: 90oC;• Ambient air temperature: 30oC;• Ground temperature: 20oC;• Depth of laying of the cables: 0.8 m;• Thermal resistivity of the soil: 1.5 K.m/W;• No soil dry-out;• Cables in air: naturally ventilated and protected

from solar radiation;• Current ratings are based on solid bonded metal-

lic sheaths;

Correction factors for other installations are given in the appropriate tables.

A temporary overload of the conductor to a maximum temperature of 105oC is allowable, but should be evaluated for each individual case.

NPR3626A separate group of three single core cables may be continuously loaded in accordance with the appropriate tables if the following assumptions are fulfilled.

Assumptions:• Ratings apply to three-phase group(s) of single

or three core cables ;• Maximum permissible temperature of the inner

conductor during continuous use: 90oC;• Ambient air temperature: 30oC;• Ground temperature: 15oC;• Depth of laying of cables: 1.0 m;• Soil thermal resistivity (wet): 0.75 K.m/W*;• Soil thermal resistivity (dry): 2.5 K.m/W*;• Soil dry-out temperature: 30oC*• Soil dry-out accounted for*;• Cables in air: naturally ventilated and protected

from solar radiation;• Current ratings are based on solid bonded and

single bonded metallic sheaths where applicable;

Correction factors for other installations are given in the appropriate tables.

A temporary overload of the conductor to a maximum temperature of 105oC is allowable, but should be evaluated for each individual case.

Continuous current-carrying capacity

* In underground installations, if a cable in the ground is continuously operated at this highest rated conductor tempe-rature, the thermal resistivity of the soil surrounding the cable may in the course of time increase from its original value as result of the drying-out processes. The mentioned cur-rent ratings in accordance with NPR3626 take this effect into account. However, if this effect does not occur, these values should not be used. Instead, the mentioned current ratings in accordance with IEC60502-2 should be used.

24

source: NEN

Selecting an energy cable

Different kinds of energy cable constructions are required to transport electrical energy from the energy station to the consumer. The following factors are important when selecting a suitable cable construction:• Maximum operating voltage;• Insulation level;• Frequency;• Load to be carried;• Daily load curve;• Magnitude and duration of possible overload

currents;• Insulation level of equipment (bare conductor

insulators, arresters, etc.);• Voltage drop;• Length of the circuit;• Profile of the circuit;• Mode of installation: - underground (whether directly or in ducts); - in air (if in a tunnel, the dimensions

and mode of ventilation of the tunnel); • Chemical and physical properties of the soil: - whether rocky, sandy, clay, boggy, moist or dry; - chemical agents liable to cause corrosion etc; - the maximum thermal resistivity of the soil;• Maximum and minimum ambient air and soil

temperatures, bearing in mind nearby hot-water pipes and other factors liable to heat (or cool) the cables;

• Specifications and requirements to be met;• The cable should be economical to use: An

optimum cross-sectional area may be calculated based on the capital costs of the cable and its running costs caused by the power losses in the cable.

Voltages

Rated VoltageThe voltage which forms the basis for certain operating characteristics and test conditions is called the rated voltage and is denoted Uo/U where: U

o = the rated r.m.s. power frequency voltage

between each conductor and sheath or sheath for which cables and accessories are designed;

U = the rated r.m.s. power frequency voltage between any two conductors for which cables and accessories are designed. Operating voltage Um = the maximum r.m.s. power –frequency voltage between any two conductors for which cables and accessories are designed;

Um is the highest voltage that can be sustained under normal operating conditions at any time and at any point in a system (temporary voltage variations due to fault conditions excluded).

Relationship between Uo/U and Um in three phase

systems are prescribed in IEC standard 60183 and USA standard C-84.

Standards

The cables described in this catalogue are standard designs, and their performance has been proven in operation. Construction and tests are in accordance with NEN publications where applicable.

25


Circular Mils

In American standards the cross sectional area is expressed in Circular Mils Ac. The relation between cross sections expressed in mm2 and Circular Mils is:

A = mm2Ac1973.5

Weights and dimensions

Weights, dimensions and characteristic data are approximate values only. Deviations due to dif-ferent constructions may occur.

Sheath marking

Our standard embossed or surface printed outer sheath marking on round cables consists of:• Name of manufacturer;• Type designation, cross-sectional area of con-

ductor, rated voltage and year of manufacture;• Continuous length marking every meter or every

few feet.

Example:YMeKrvasdlwd 6/10kV 1x400 2010 134m

Laying information

During laying of energy cables, particular atten-tion must be paid to the permissible tensile force:• Permissible tensile forces when pulling by cable

pulling grip for single core and three core plastic cables with copper or aluminium conductors up to and including 18/30kV cables: F = 3 x D2 in Newtons;

• Permissible tensile forces when pulling by cable pulling grip for three core plastic cables with copper or aluminium conductors and steel armouring wires up to and including 18/30kV cables: F = 8 x D2 in Newtons;

Where D is the cable outer diameter expressed in mm

R = R20 [1+ α20 (T-20 °C)]

R = DC resistance at temperature t, Ω/kmR

20 = DC resistance of cond. at 20 °C, Ω/km

T = temperature of conductor, °C α

20 = temperature coefficient of the resistance at 20 °C, 1/ °C

for copper: α20

= 0.00393 for aluminium: α

20 = 0.00403

• Maximum recommended tensile forces when a pulling eye is attached to the conductor:

Alu stranded: F = A x 30 N/mm2

Alu solid: F = A x 20 N/mm2

Cu stranded: F = A x 50 N/mm2;• Maximum recommended tensile force when a

pulling eye is attached to the armouring wires: steel wires: F = A x 150 N/mm2

Where A is the cross sectional area of the con-ductor or armouring in mm2.

Minimum permissible cable temperature during laying:• With PVC outer sheath: - 5 °C• With PE outer sheath: -10 °C

At lower temperature the cables must be adequa-tely warmed up before installation. This may be achieved by storing the cables in a heated room for at least 24h or by means of special equip-ment.

Resistances

Direct current resistanceThe maximum DC resistance values of conduc-tors at 20oC are in the relevant tables. The DC resistance at other conductor temperatures may be calculated using the equation:

Effective resistanceThe effective resistance (= alternating current resistance) consists of the DC resistance and the extra resistance, which takes into account additional losses caused by the current displace-ment in the conductor (skin effect and proximity effect).

In the tables the given effective resistance of the conductors at maximum conductor temperature, is based on the following assumptions:• Frequency 50 Hz;• Solid bonded circuit;

26

Operating capacitance, charging current and earth fault current

The values for the operating capacitance of the cables are average values based on measurements and calculations. The values for the charging current are valid at a temperature of 20oC, at a frequency of 50 Hz and at the rated voltage of the cable. The values of capacitance, charging current and earth fault current will not change when using XLPE insulated cables when the temperature increases from 20oC to the maximum permissible continuous conductor temperature.

Short-circuit current capacity

When planning cable installations, care has to be taken that the cables and fittings chosen are capable of withstanding the expected dynamic and thermal short-circuit stresses.

The dynamic stresses depend on the maximum asymmetric short-circuit current and the thermal stresses depend on the mean short-circuit current.

Dynamic stressesIn general, cables and their accessories will withstand the dynamic stresses under short-circuit conductions without problems, but near power stations it is important to take the dynamic short-circuit current capacity into consideration and to pay attention to the method of installation.

Thermal stressesIn the previous tables, the mentioned maximum permissible short circuit currents are applicable for a short –circuit duration of one second.The values are based on the following assumptions: • Before short circuit the temperature of con-

ductors = max. permissible temperature of conductor in continuous use (i.e.: 90oC)

• Max. permissible temperature of conductor in short circuit is 250oC for XLPE insulated cables, for the metallic sheath is 210oC.

• The permissible short-circuit current for dura-tions of 0.2 to 5 seconds may be calculated by multiplying the max. permissible short-circuit current for one second by a value of 1/√t, where t is the new short-circuit duration in seconds.

Inductance

The inductances can be calculated for the various laying configurations with the following equation:

L =X

2 •π • fL = inductance, mH/kmX = reactance, ohm/kmf = system frequency, Hz

27



Alrm mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 - - 95 120 150 185 240 300 400 500 630 - - -

Curs mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 -

Copper wire screen surface area mm2 16 16 16 16 25 25 25

Max D.C. conductor resistance at 20ºC (Copper conductor) Ω/km 0.387 0.268 0.193 0.153 0.124 0.0991 0.0754 0.0601 0.047 0.0366 0.0283 0.022 0.018 -

Aproximate A.C. resistance at 90ºC (Copper conductor) Ω/km 0.494 0.342 0.247 0.196 0.159 0.128 0.098 0.079 0.063 0.049 0.041 0.032 0.024 -

Max D.C. conductor resistance at 20ºC (Aluminium conductor) Ω/km 0.641 0.443 0.32 0.253 0.206 0.164 0.125 0.1 0.0778 0.0605 0.0469 0.037 0.029 0.025

Aproximate A.C. resistance at 90ºC (Aluminium conductor) Ω/km 0.822 0.568 0.411 0.325 0.265 0.211 0.161 0.13 0.102 0.08 0.063 0.051 0.043 0.032

DC resistance of the metallic screen @ 20ºC (approximate value) Ω/km 1.078 1.078 1.078 1.078 0.690 0.690 0.690 0.690 0.493 0.493 0.493 0.431 0.345 0.287

Maximum short-circuit current for one second

Copper conductor kA 7.4 10.3 13.9 17.6 21.9 27 34.9 43.5 57.9 72.3 91 115.5 144.2 -

Aluminium conductor kA 7.4 10.3 13.9 17.6 21.9 27 34.9 28.9 38.4 48 60.3 76.5 95.5 114.5

Copper wire screen kA 3.2 3.2 3.2 3.2 4.9 4.9 4.9 4.9 6.9 6.9 6.9 7.9 9.8 11.8

Electrical characteristics of 10-30kV conductors

28



Alrm mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 - - 95 120 150 185 240 300 400 500 630 - - -

Curs mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 -


Copper conductor:

Direct buried Trefoil (touching) A 196 239 285 323 361 406 469 526 590 675 755 810 862 -

Direct buried Flat (touching) A 205 250 295 335 370 420 480 535 590 655 725 764 801 -

Direct buried Flat (spaced) A 203 246 293 332 366 410 470 524 572 650 715 746 765 -

In ducts Trefoil (touching) A 186 227 271 308 343 387 447 504 564 605 670 759 798 -

In ducts Flat (touching) A 188 229 274 311 347 391 453 510 571 597 643 689 705 -

In air Trefoil (touching) A 238 296 361 417 473 543 641 735 845 900 1030 1145 1264 -

In air Flat (touching) A 243 303 369 426 481 550 647 739 837 908 1040 1191 1280 -

In air Flat (spaced) A 286 356 434 500 559 637 745 846 938 1013 1134 1306 1360 -

Aluminium conductor:

Direct buried Trefoil (touching) A 152 186 221 252 281 317 367 414 470 545 615 668 730 768

Direct buried Flat (touching) A 160 195 230 260 290 330 380 425 475 540 605 639 688 717

Direct buried Flat (spaced) A 157 192 229 260 288 324 373 419 466 535 600 633 669 684

In ducts Trefoil (touching) A 144 176 210 240 267 303 351 397 451 505 565 628 678 707

In ducts Flat (touching) A 146 178 213 242 271 307 356 402 457 487 546 587 617 631

In air Trefoil (touching) A 184 230 280 324 368 424 502 577 673 720 835 1018 1138 1222

In air Flat (touching) A 189 236 287 332 376 432 511 586 676 730 850 1040 1160 1200

In air Flat (spaced) A 222 278 338 391 440 504 593 677 769 840 956 1089 1171 1209

Current rating for 10-30kV single core medium voltage cables in accordance with IEC60502-2

29




Alrm mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 1200

Alrs mm2 - - 95 120 150 185 240 300 400 500 630 - - -

Curs mm2 50 70 95 120 150 185 240 300 400 500 630 800 1000 -

Solid bonded

Copper conductor:



Direct buried Flat (spaced 70mm) A 205 245 290 325 360 400 455 505 515 560 615 660 705 -


In air Flat (spaced 70mm) A 280 350 425 485 550 625 730 825 880 985 1095 1205 1305 -




Direct buried Flat (spaced 70mm) A 160 195 230 260 285 320 365 410 435 480 530 580 630 641


In air Flat (spaced 70mm) A 220 270 330 380 430 495 580 660 735 835 940 1055 1165 1240

Single point bonded

Copper conductor:



Direct buried Flat (spaced 70mm) A 205 245 290 325 360 400 455 505 635 715 810 905 995 -


In air Flat (spaced 70mm) A 280 350 425 485 550 625 730 825 1050 1220 1415 1625 1835 -




Direct buried Flat (spaced 70mm) A 160 195 230 260 285 320 365 410 495 565 645 725 810 872


In air Flat (spaced 70mm) A 220 270 330 380 430 495 580 660 825 965 1125 1310 1500 1662

Current rating for 10-30kV single core medium voltage cables in accordance with NPR3626

30



Alrm mm2 50 70 95 120 150 185 240

Alrs mm2 - - 95 120 150 185 240

Curs mm2 50 70 95 120 150 185 240


Copper conductor:

Unarmoured Direct buried A 181 221 262 298 334 377 434

Unarmoured In ducts A 158 193 231 264 297 336 390

Unarmoured In air A 204 253 304 351 398 455 531

Armoured Direct buried A 181 220 263 298 332 374 431

Armoured In ducts A 158 194 232 264 296 335 387

Armoured In air A 205 253 307 352 397 453 529


Unarmoured Direct buried A 140 171 203 232 260 294 340

Unarmoured In ducts A 122 150 179 205 231 262 305

Unarmoured In air A 158 196 236 273 309 355 415

Armoured Direct buried A 140 171 204 232 259 293 338

Armoured In ducts A 123 150 180 206 231 262 304

Armoured In air A 159 196 238 274 309 354 415

Current rating for 10-30kV three core armoured and unarmoured medium voltage cables in accordance with IEC60502-2

Copper conductor:

Direct buried A 185 225 270 300 335 380 435

In air A 210 260 315 360 410 460 540


Direct buried A 140 175 210 240 270 315 350

In air A 168 210 260 300 340 380 460

Current rating for 10-30kV three core armoured and unarmoured medium voltage cables in accordance with NPR3626

31



Rating factors for variation of ambient air temperature:

Ambient air temperature [ºC] 20 25 30 35 40 45 50 55 60

Value 1.08 1.04 1.0 0.96 0.91 0.87 0.82 0.76 0.71

Rating factors for variation of ground temperature

Ground temperature [ºC] 10 15 20 25 30 35 40 45 50

Value 1.07 1.04 1.0 0.96 0.93 0.89 0.85 0.8 0.76

Rating factors for variation of installation depth for direct buried cables

Installation depth [m] 0.5 0.6 0.8 1 1.25 1.5 1.75 2 2.5 3

Single core cables: ≤185mm2 1.04 1.02 1.0 0.98 0.96 0.95 0.94 0.93 0.91 0.9

Single core cables: >185mm2 1.06 1.04 1.0 0.97 0.95 0.93 0.91 0.9 0.88 0.86

Three core cables 1.04 1.03 1.0 0.98 0.96 0.95 0.94 0.93 0.91 0.9

Rating factors for variation of installation depth for cables installed in ducts

Installation depth [m] 0.5 0.6 0.8 1 1.25 1.5 1.75 2 2.5 3

Single core cables: ≤185mm2 1.04 1.02 1.0 0.98 0.96 0.95 0.94 0.93 0.91 0.9

Single core cables: >185mm2 1.05 1.03 1.0 0.97 0.95 0.93 0.92 0.91 0.89 0.88

Three core cables 1.03 1.02 1.0 0.99 0.97 0.96 0.95 0.94 0.93 0.92

Rating factors for single and three core medium voltage cables based on IEC60502-2

1 2 3 4

0.7 1.37 1.21 1.08 1.03

0.8 1.3 1.14 1.03 0.98

0.9 1.24 1.09 0.98 0.93

1.0 1.19 1.05 0.94 0.89

1.5 1.00 0.88 0.79 0.75

2.0 0.88 0.77 0.70 0.66

2.5 0.79 0.70 0.62 0.59

3.0 0.73 0.64 0.58 0.55

0.7 1.25 1.15 1.06 1.03

0.8 1.21 1.11 1.03 0.99

0.9 1.17 1.08 0.99 0.96

1.0 1.14 1.05 0.97 0.93

1.5 1.00 0.92 0.85 0.82

2.0 0.90 0.83 0.77 0.74

2.5 0.83 0.76 0.71 0.68

3.0 0.77 0.71 0.65 0.63

0.7 1.28 1.15 1.05 1.01

0.8 1.23 1.11 1.01 0.97

0.9 1.19 1.07 0.98 0.94

1.0 1.15 1.04 0.94 0.91

1.5 1.00 0.9 0.82 0.79

2.0 0.90 0.81 0.74 0.71

2.5 0.82 0.74 0.67 0.65

3.0 0.76 0.68 0.62 0.60

0.7 1.17 1.08 0.99 0.96

0.8 1.14 1.05 0.97 0.93

0.9 1.12 1.03 0.95 0.92

1.0 1.10 1.01 0.94 0.90

1.5 1.00 0.92 0.85 0.82

2.0 0.92 0.85 0.78 0.75

2.5 0.86 0.79 0.73 0.71

3.0 0.81 0.75 0.69 0.66

Axial seperation of circuits Thermal resistivity[K.m/W]

Number of parallel cable circuits

S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S

S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S

S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S

S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S

Rating factors for variation of thermal

resistivity of the soil and groups of direct buried single core cables, where the

circuits are spaced 400 mm apart


resistivity of the soil and groups of single core cables installed in ducts, where the



resistivity of the soil and groups of direct buried three core cables, where the



resistivity of the soil and groups of three core cables installed in ducts, where the


32S = axial separation of groups of cableD = cable diameter

Rating factors for variation of ambient air temperature:

Ambient air temperature [ºC] 15 20 25 30 35 40

Value 1.14 1.1 1.1 1 0.95 0.90

Rating factors for variation of ground temperature

Ground temperature [ºC] 5 10 15 20 25

Value 1.14 1.07 1.0 0.92 0.83

Rating factors for single and three core medium voltage cables based on NPR3626

1 2 3

0.5 1.11 0.89 0.79

0.75 1.00 0.80 0.71

1.0 0.94 0.76 0.67

1.2 0.91 0.73 0.65

1.5 0.88 0.70 0.62

1 2 3

Spacing between trefoils [mm]

70 250 70 250

0.5 1.11 0.87 0.93 0.75 0.82

0.75 1.00 0.78 0.84 0.68 0.74

1.0 0.94 0.74 0.79 0.64 0.70

1.2 0.91 0.71 0.77 0.62 0.68

1.5 0.88 0.69 0.73 0.59 0.65

70 250 70 250

0.5 1.11 0.87 0.93 0.75 0.82

0.75 1.00 0.78 0.84 0.68 0.74

1.0 0.94 0.74 0.79 0.64 0.70

1.2 0.91 0.71 0.77 0.62 0.68

1.5 0.88 0.69 0.73 0.59 0.65

Axial seperation of circuits Thermal resistivity[K.m/W]



S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S

S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S

S

S

S

S

S

S

D70mm

70mm

250mm

70mm

250mm

S


resistivity of the soil and groups of

direct buried single core cables in flat

formation


resistivity of the soil and groups of direct buried single core cables in trefoil


resistivity of the soil and groups of direct buried three core cables

Disclaimer

While reasonable care has been used in collecting and displaying information contained herein, Prysmian provides no express or implied warranty as to its accuracy, completeness, usefulness, use in any manner by users and disclaims any liability for errors or omissions herein.

Information may be changed or updated without notice. Prysmian may also make improvements and/or changes in the products or information described in this brochure without notice. Prysmian assumes no liability, express or implied of whatsoever nature with respect to the use of any content thereof.

33

Connection BlackCircuit length: ~4250

meter

1x185mm² Cu PE insulatedEarthing cable

8000m

300m

High voltage cable EYLKrvlwd 87/150 kV 1x1600Alrm

Symbol Description Type Qty

Components

6Joint with sheath interruption CFJX-170

Po box 495, 2600 AL DelftNetherlands

Format:

Scale: n.a.Dimensions in m

16-11-‘10

Drawn: M.R.H. Oltmans

Checked: J. van Rossum

A3

American projectionDept. System Engineering

quotation no.

Version: 1Drawing : SD10-41

520.10.0001/02Cross-bonding box 6SX-FS

Substation

Customer

150kV Cable connection

150kV connection

Outdoor termination OTC-170-X 3

Joint pit 2Joint pit 1 Joint pit 3 Joint pit 4 Joint pit 5

~725m ~725m ~685m ~665m ~730m ~720m

Dry type termination CFC-170 3

9Straight-through joint CFJ-170

Transformer

1200

mm

1000

mm

300mm

Surface

Also available

High and extra high voltage cable systems

Prysmian Cables and Systems B.V. has been at the cutting edge of the of high voltage cable systems technology for several decades. We have experience not only in medium voltage cable systems but also supplying all types of high voltage cable systems throughout the world with full turnkey capability.

System designFor each (E)HV project a specific design is created that fits the customers’ needs and fulfils any specific constraints:- Cable design;- Accessories design;- Functional requirements;- Standards;- Environmental conditions;- Thermo-Mechanical design;- Metallic sheath bonding arrangement;- Laying configuration.

Complete system supplyWe supply a complete range of accessories andfittings for splicing and terminating as well as tools and mequipment, for all of the high and extra high voltage classes. Combined with our planning and supervision of the overall system package and after sales services, you will not find a more suitable partner anywhere else.

Research, development and qualityThe introduction of new cable systems with XLPEcables and accessories is preceded by an extensive mresearch and development program. Not only type tests, but also qualification tests and development tests are performed according to relevant standards and specifications. Of course all of these tests are performed in accordance with PRYSMIAN CABLES AND SYSTEMS B.V.’s quality system (ISO 9001:2000) and environmental system (ISO 14001).

Prysmian Cables and Systems B.V. has pre-qualified its product range for the EHV voltage class in accordance with IEC62067, up to 500kV.

ContactFor more information concerning high and extra high voltage cable technology or our brochure concerning high voltage cables or Click-Fit accessories, please feel free to contact us via the information on the back of this brochure.

34

Diagnostic & Testing Services

Prysmian offers accessible solutions for corrective- and preventive maintenance, monitoring, services and emergencies, including:- (E)HV Site Acceptance Testing with Prysmian’s

own mobile resonance test systems;- On-site dielectric diagnostics of MV, HV and

EHV cable systems with: - Resonance testing; - Sinusoidal Damped AC (DAC) testing;- 24/7 emergency service;- Qualified personnel and expert equipment for

jointing and maintenance of any existing HV cable system;

- Qualified personnel and expert equipment for fault localisation and on-site diagnostics;

- Knowledge and expertise in fault analysis and risk assessment;

- Training in condition assessment and maintenance of cable systems;

- Oil leak localization equipment;- Mobile oil refilling units for LPOF cable systems;- Oil degassing;- Contracts with suppliers and (civil) contractors

for emergency services outside office hours;- Extensive emergency stock of cables and

accessories;- Expertise in XLPE and LPOF cable systems;- Extensive knowledge and information

concerning existing cable circuits;- Qualified personnel and equipment at

Prysmian’s own High Voltage Research Laboratory (HRL), Material Laboratory (MLE) and Oil Research Laboratory in Delft (NL);

- Close cooperation with the Delft University of Technology with respect to specialists and specialist equipment;

- Cable load prediction system (CLPS);- Sheath Voltage Limiter (SVL) Monitoring

System.

ContactFor more information concerning corrective- andpreventive maintenance, monitoring, services andemergencies or our brochure concerning Diagnostic & Testing Services, please feel free to contact us via the information on the back of this brochure.

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