EDS KV TRIPLEX CABLE RATING

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Document Number: EDS 02-0027 Network(s): Summary: EPN, LPN, SPN ENGINEERING DESIGN STANDARD EDS 02-0027 11KV TRIPLEX CABLE RATING This engineering design standard provides the cable ratings and

1 Document Number: EDS Network(s): Summary: EPN, LPN, SPN ENGINEERING DESIGN STANDARD EDS KV TRIPLEX CABLE RATING This engineering design standard provides the cable ratings and important technical information for the use of Triplex 11kV cables in UK Power Networks. Author: Jesse Garcia Approved By: Paul Williams Approved This document forms part of the Company s Integrated Business System and its requirements are mandatory throughout UK Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset Management. If you have any queries about this document please contact the author or owner of the current issue. Applicable To UK Power Networks All UK Power Networks Asset Management Capital Programme Connections HSS&TT Network Operations UK Power Networks Services Other External G81 Website Contractors ICPs/IDNOs Meter Operators THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE

2 Revision Record Version 9.0 Review Date 14/12/2021 Date 14/12/2016 Author Jesse Garcia Reason for Change: Periodic review, updated re Introduction of new design of cable with aluminium wire screens What has changed: All sections updated to reflect the change of design from copper wire screens to aluminium wire screens, document title revised. Version 8.0 Review Date 10/12/2015 Date 03/12/2012 Author Paul Williams Document reviewed, no changes Version 7.0 Review Date Date 29/06/2012 Author Michael Sinclair Added winter cable ratings and checked suitability for publication as a G81 document Version 6.2 Review Date Date 04/08/2011 Author Don Fossett Document reclassified from EI to EDS Version 6.1 Review Date Date 03/02/2011 Author Don Fossett Document rebranded Version 6.0 Review Date Date 23/10/2009 Author Paul Williams Additional Cable Size 185mm copper added to document Version 5.0 Review Date Date 09/06/2009 Author Paul Williams Document reviewed and updated Added winter cable ratings and checked for suitability for publication as a G81 document UK Power Networks 2016 All rights reserved 2 of 14

3 Contents 1 Introduction Scope Glossary and Abbreviations Standard Drum Details Current Table for Triplex Cables s s Cable s for Widely Used Installation Conditions Single Circuit Laid Direct Double Circuit laid Direct (Both circuits loaded at the same time) Ducted Single Circuit Ducted Double Circuit (Both circuits loaded at the same time) Current Tables for Comparison with Existing Designs Three core Belted PILC Cables with Copper s Three core Belted PILC Cables with Aluminium s Three core PICAS Cables with Aluminium s Single core Poly-laminate Cables laid in Trefoil with Solid Aluminium s Single core Polymeric Cables laid in Trefoil with Solid Aluminium s Single core Polymeric Cables laid in Trefoil with Stranded Copper s Typical Technical Data Sheets Aluminium s Copper s UK Power Networks 2016 All rights reserved 3 of 14

4 1 Introduction The purpose of this engineering design standard is to provide designers and installers with the necessary technical and practical information to enable the use of the new design of 11kV triplex cable in UK Power Networks. 2 Scope This document only covers the five main types of triplex 11kV cable supplied by one of the following cable manufacturers: Cabelte (Portugal); Nexans (France, Greece and Turkey); NKT Cables (Denmark); Solidal (Portugal). The standard sizes are as follows: 95mm 2 aluminium conductor triplex XLPE cable with a 58mm 2 aluminium wire screen and a red PE outer sheath; 185mm 2 aluminium conductor triplex XLPE cable with a 115mm 2 aluminium wire screen and a red PE outer sheath; 185mm 2 copper conductor triplex XLPE cable with a 115mm 2 aluminium wire screen and a red PE outer sheath; 300mm 2 aluminium conductor triplex XLPE cable with a 115mm 2 aluminium wire screen and a red PE outer sheath; 300mm 2 copper conductor triplex XLPE cable with a 115mm 2 aluminium wire screen and a red PE outer sheath; Note: All the above are also available as single core cables with a low smoke zero halogen sheath for installation in cable tunnels, basements, etc. 3 Glossary and Abbreviations Term Al Cu UK Power Networks Definition Aluminium Copper UK Power Networks (Operations) Ltd consists of three electricity distribution networks: Eastern Power Networks plc (EPN). London Power Network plc (LPN). South Eastern Power Networks plc (SPN). UK Power Networks 2016 All rights reserved 4 of 14

5 4 Standard Drum Details The new range of 11kV cables will only be available from UK Power Networks Logistics Cable Management in the following full drum lengths: Size and Standard Drum Length (m) UK Power Networks Stores Code 95mm 2 aluminium P 185mm 2 aluminium K 185mm 2 copper E 300mm 2 aluminium U 300mm 2 copper P 5 Current Table for Triplex Cables This table provides a guide to the current ratings for triplex cables. All the ratings quoted are s for 1 single triplex cable only and are in accordance with Engineering Recommendation P17. For copper wire screened triplex cables the ratings for aluminium wire screened versions shall be used. The MVA ratings are for a three-phase supply. s for multiple cable circuits should be calculated individually. Appendix A of this document provides ratings for the more commonly used types of installation: s Area mm² 95 Al 185 Al 185 Cu 300 Al 300 Cu Current per Cable Based on a 600mm depth of cover Laid direct in ground Installed in ducts Installed in Free air (Shaded from Solar Radiation) Amps MVA Amps MVA Amps MVA UK Power Networks 2016 All rights reserved 5 of 14

6 5.1.2 s Area mm² 95 Al 185 Al 185 Cu 300 Al 300 Cu Current per Cable Based on a 600mm depth of cover Laid direct in ground Installed in ducts Installed in Free air (Shaded from Solar Radiation) Amps MVA Amps MVA Amps MVA UK Power Networks 2016 All rights reserved 6 of 14

11 6 Current Tables for Comparison with Existing Designs The tables in this section are designed to provide a guide between the current ratings of existing designs and the new triplex cables. All the ratings quoted are s and are in accordance with Engineering Recommendation P17. The MVA ratings are for a three-phase supply Three core Belted PILC Cables with Copper s Area in² Current per 600mm depth of cover, g = 1.2 C m/watt. Ground / Air temp = 15 C Laid Direct in ground Installed in ducts Installed in Free air* Amps MVA Triplex Amps MVA Triplex Amps MVA Triplex * shaded from solar radiation Three core Belted PILC Cables with Aluminium s Area in² 0.04in² 0.06in² 0.10in² 0.15in² 0.20in² 0.25in² 0.30in² 0.40in² 0.50in² 95mm² 185mm² 240mm² 300mm² Current per 600mm depth of cover, g = 1.2 C m/watt. Ground / Air temp = 15 C Laid Direct in ground Installed in ducts Installed in Free air* Amps MVA Triplex Amps MVA Triplex Amps MVA Triplex *shaded from solar radiation Three core PICAS Cables with Aluminium s Area 95mm² 185mm² 300mm² Current per 600mm depth of cover, g = 1.2 C m/watt. Ground / Air temp = 15 C Laid Direct in ground Installed in ducts Installed in Free air* Amps MVA Triplex Amps MVA Triplex Amps MVA Triplex *shaded from solar radiation UK Power Networks 2016 All rights reserved 11 of 14

12 6.1.4 Single core Poly-laminate Cables laid in Trefoil with Solid Aluminium s Area 150mm² 240mm² Current per 600mm depth of cover, g = 1.2 C m/watt. Ground / Air temp = 15 C Laid Direct in ground Installed in ducts Installed in Free air* Amps MVA Triplex Amps MVA Triplex Amps MVA Triplex *shaded from solar radiation Single core Polymeric Cables laid in Trefoil with Solid Aluminium s Area 70mm² 150mm² 185mm² 240mm² 300mm² Current per 600mm depth of cover, g = 1.2 C m/watt. Ground / Air temp = 15 C Laid Direct in ground Installed in ducts Installed in Free air* Amps MVA Triplex Amps MVA Triplex Amps MVA Triplex *shaded from solar radiation Single core Polymeric Cables laid in Trefoil with Stranded Copper s Area 185mm² 240mm² 300mm² Current per 600mm depth of cover, g = 1.2 C m/watt. Ground / Air temp = 15 C Laid Direct in ground Installed in ducts Installed in air Amps MVA Triplex Amps MVA Triplex Amps MVA Triplex *shaded from solar radiation UK Power Networks 2016 All rights reserved 12 of 14

13 7 Typical Technical Data Sheets 7.1 Aluminium s 1. Stranded or solid Aluminium 2. Semi-Conducting Screen 3. XLPE Insulation 4. Bonded Semi-Conducting Screen or 115 mm² Al. Wire Screen 6. Binder tape 7. Red LLDPE Sheath Nominal cross-sectional area mm² Approximate diameter over conductor mm Minimum thickness of conductor screen mm Minimum average thickness of insulation mm Diameter over insulation mm Minimum thickness of insulation screen mm Diameter over bonded insulation screen mm Nominal area of aluminium wire screen Number of wires Nominal diameter of wires mm² mm Diameter over aluminium wire screen mm Minimum average thickness of oversheath mm Approximate overall diameter of Single Core mm Approximate overall diameter of Triplex Cable mm Approximate cable weight kg/m Minimum bending radius mm Maximum pulling tension on Triplex Group kg Nominal internal diameter of duct mm Maximum DC screen 20 C /km Approximate Capacitance (C) µf/km Maximum DC resistance 20 C /km Maximum AC resistance (R 90 C /km Positive Sequence Reactance /km Short circuit ratings 1 Second Short Circuit of (90 to 250 C) ka Second Short Circuit of aluminium wire screen (80 to 250 C) ka UK Power Networks 2016 All rights reserved 13 of 14

14 7.2 Copper s 1. Stranded Copper 2. Semi-Conducting Screen 3. XLPE Insulation 4. Bonded Semi-Conducting Screen mm² Aluminium Wire Screen 6. Binder tape 7. Red LLDPE Sheath Nominal cross-sectional area mm² Approximate diameter over conductor Mm Minimum thickness of conductor screen mm Minimum average thickness of insulation mm Diameter over insulation mm Minimum thickness of insulation screen mm Diameter over bonded insulation screen mm Nominal area of aluminium wire screen mm² Number of wires Nominal diameter of wires mm Diameter over aluminium wire screen mm Minimum average thickness of oversheath mm Approximate overall diameter of Single Core mm Approximate overall diameter of Triplex Cable mm Approximate cable weight kg/m Minimum bending radius mm Maximum pulling tension on Triplex Group kg Nominal internal diameter of duct mm Maximum DC screen 20 C /km Approximate Capacitance (C) µf/km Maximum DC resistance 20 C /km Maximum AC resistance (R 90 C /km Positive Sequence Reactance /km Short circuit ratings 1 Second Short Circuit of (90 to 250 C) ka Second Short Circuit of Copper wire screen (80 to 250 C) ka UK Power Networks 2016 All rights reserved 14 of 14

EDS KV SINGLE CORE XLPE CABLES

EDS KV SINGLE CORE XLPE CABLES THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE Document Number: EDS 02-0034 ENGINEERING DESIGN STANDARD EDS 02-0034 33KV SINGLE CORE XLPE CABLES Network(s): EPN, LPN,