EDS KV TRIPLEX CABLE

Transcription

1 THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE Document Number: EDS ENGINEERING DESIGN STANDARD EDS KV TRIPLEX CABLE Network(s): EPN, LPN, SPN Summary: This engineering design standard provides the necessary technical information for the use of Triplex 11kV cables for UK Power Networks. Originator: Paul Williams Approved By: Steve Mockford Approved Date: 11/12/2012 Review Date: 10/12/2015 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 UK Power Networks Director of Asset Management. If you have any queries about this document please contact the originator of the current issue. Document History (The document history notes below are intended as a guide only and may not cover all of the changes. If you wish to make use of this document it should be read in full.) Version Date Details Originator /06/2009 Document reviewed and updated Paul Williams /10/2009 Additional Cable Size 185mm copper added to document Paul Williams /02/2011 Document rebranded Don Fossett /08/2011 Document reclassified from EI to EDS Don Fossett /06/2012 Added winter cable ratings and checked for suitability for publication as a G81 document Michael Sinclair /12/2012 Document reviewed, no changes Paul Williams 1 of 14 UK Power Networks 2012 All rights reserved

2 Contents 1 Introduction Scope Details Standard Drum Lengths, Sizes and Weights Current Table for Triplex Cables 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 Nexans Technical Data Sheets Prysmian Technical Data Sheets... 9 Appendix A Cable s for Widely Used Installation Conditions A.1 Single Circuit Laid Direct A.2 Double Circuit laid Direct (Both circuits loaded at the same time) A.3 Ducted Single Circuit A.4 Ducted Double Circuit (Both circuits loaded at the same time) of 14 UK Power Networks 2012 All rights reserved

3 1 Introduction The purpose of this engineering design standard is to provide designers and installers with the necessary technical and practical information required 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 either Nexans or Prysmian Cables: 95mm 2 aluminium single core XLPE cable laid up in triplex format; 185mm 2 aluminium single core XLPE cable laid up in triplex format; 185mm 2 copper single core XLPE cable laid up in triplex format; 300mm 2 aluminium single core XLPE cable laid up in triplex format; 300mm 2 copper single core XLPE cable laid up in triplex format. 3 Details 3.1 Standard Drum Lengths, Sizes and Weights The following table details the standard drum lengths, drum sizes and drum weights that apply to the standard drum lengths available from UK Power Networks Logistics Department. Longer drum lengths can be made available but these would be subject to a special order on the manufacturer with a longer lead time. Size (mm) Standard Drum Length (m) Manufacturer Standard Drum Dimensions (mm) 95 Al 500 Nexans 2200 x Al 250 Nexans 2200 x Al 250 Nexans 2200 x Cu 250 Nexans 2600 x Al 500 Prysmian 2200 x Al 250 Prysmian 1900 x Cu 250 Prysmian 2200 x Al 250 Prysmian 2200 x Cu 250 Prysmian 2600 x Standard Drum Weight (kg) 3 of 14 UK Power Networks 2012 All rights reserved

4 3.2 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. 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: 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 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 of 14 UK Power Networks 2012 All rights reserved

5 3.3 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 mm 2 Cu * 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 of 14 UK Power Networks 2012 All rights reserved

6 3.3.4 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 mm² 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 300mm 2 Cu 300mm 2 Cu mm 2 Cu 300mm 2 Cu mm 2 Cu 300mm 2 Cu 6 of 14 UK Power Networks 2012 All rights reserved

7 3.4 Nexans Technical Data Sheets 1. Stranded Aluminium 2. Semi-Conducting Screen 3. XLPE Insulation 4. Bonded Semi-Conducting Screen or mm² Copper Wire Screen 6. Binder tape 7. Red LLDPE Sheath Nexans 6350/11000 Volt Triplex Cable XLPE insulation Stranded aluminium conductor Copper wire screened UK Power Networks Standard EDS Nominal cross-sectional area mm² Approximate diameter over conductor Mm Approximate thickness of conductor screen mm Minimum average thickness of insulation mm Nominal area of copper wire screen Number of wires Nominal diameter of wires mm² 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 Inductance 90 C mh/km Reactance 90 C /km Zero Sequence Resistance /km Zero Sequence Reactance /km Positive Sequence Resistance /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 of 14 UK Power Networks 2012 All rights reserved

8 Nexans Technical Data Sheets - Continued 1. Stranded Copper 2. Semi-Conducting Screen 3. XLPE Insulation 4. Bonded Semi-Conducting Screen 5. mm² Copper Wire Screen 6. Binder tape 7. Red LLDPE Sheath Nexans 6350/11000 Volt Triplex Cable XLPE insulation Stranded copper conductor Copper wire screened Nominal cross-sectional area mm² 300 Approximate diameter over conductor Mm 20.5 Approximate thickness of conductor screen mm 0.4 Minimum average thickness of insulation mm 3.4 Nominal area of copper wire screen Number of wires Nominal diameter of wires UK Power Networks Standard EDS mm² mm Minimum average thickness of oversheath mm 1.68 Approximate overall diameter of Single Core mm 38.8 Approximate overall diameter of Triplex Cable mm 87.7 Approximate cable weight kg/m Minimum bending radius mm 5 Maximum pulling tension on Triplex Group kg 1500 Nominal internal diameter of duct mm 125 Maximum DC screen 20 C /km Approximate Capacitance (C) µf/km 0.51 Maximum DC resistance 20 C /km Maximum AC resistance (R 90 C /km Inductance 90 C mh/km 0.31 Reactance 90 C /km 0.10 Zero Sequence Resistance /km 0.39 Zero Sequence Reactance /km Positive Sequence Resistance /km 0.09 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 of 14 UK Power Networks 2012 All rights reserved

9 3.5 Prysmian Technical Data Sheets 1. Stranded Aluminium 8. Semi-Conducting Screen 9. XLPE Insulation 10. Bonded Semi-Conducting Screen or mm² Copper Wire Screen 12. Binder tape 13. Red LLDPE Sheath Prysmian 6350/11000 Volt Triplex Cable XLPE insulation Stranded aluminium conductor Copper wire screened UK Power Networks Standard EDS Nominal cross-sectional area mm² Approximate diameter over conductor Mm Approximate thickness of conductor screen mm Minimum average thickness of insulation mm Nominal area of copper wire screen Number of wires Nominal diameter of wires mm² 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 Inductance 90 C mh/km Reactance 90 C /km Zero Sequence Resistance /km Zero Sequence Reactance /km Positive Sequence Resistance /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 of 14 UK Power Networks 2012 All rights reserved

10 Prysmian Technical Data Sheets - Continued 1. Stranded Copper 2. Semi-Conducting Screen 3. XLPE Insulation 4. Bonded Semi-Conducting Screen 5. mm² Copper Wire Screen 6. Binder tape 7. Red LLDPE Sheath Prysmian 6350/11000 Volt Triplex Cable XLPE insulation Stranded copper conductor Copper wire screened UK Power Networks Standard EDS Nominal cross-sectional area mm² Approximate diameter over conductor Mm Approximate thickness of conductor screen mm Minimum average thickness of insulation mm Nominal area of copper wire screen Number of wires Nominal diameter of wires mm² 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 Inductance 90 C mh/km Reactance 90 C /km Zero Sequence Resistance /km Zero Sequence Reactance /km Positive Sequence Resistance /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 of 14 UK Power Networks 2012 All rights reserved

11 Appendix A Cable s for Widely Used Installation Conditions A.1 Single Circuit Laid Direct 600mm mmm m mm 2 Cu mm 2 Cu mm 2 Cu mm 2 Cu of 14 UK Power Networks 2012 All rights reserved

12 A.2 Double Circuit laid Direct (Both circuits loaded at the same time) 600mm mmm m 300mm mm 2 Cu mm 2 Cu mm 2 Cu mm 2 Cu of 14 UK Power Networks 2012 All rights reserved

13 A.3 Ducted Single Circuit 600mm mmm m mm 2 Cu mm 2 Cu mm 2 Cu mm 2 Cu of 14 UK Power Networks 2012 All rights reserved

14 A.4 Ducted Double Circuit (Both circuits loaded at the same time) 600mm mmm m 300mm mm 2 Cu mm 2 Cu mm 2 Cu mm 2 Cu of 14 UK Power Networks 2012 All rights reserved