Discipline: Engineering (Electrical) Category: Standard
High Voltage Cable Selection
Guide
PDS 14
Applicability
ARTC Network Wide 9 CRIA (NSW CRN)
Primary Source
RIC Standard EP 20 10 00 02 SP version 1.0
Document Status
Version Date Reviewed Prepared by Reviewed by Endorsed Approved
1.3 1 September 2010 Standards National Bridges Exec Manager CEO
& Structures Eng SS&P 23/09/2010
/ Mgr Standards
Amendment Record
Version Date Reviewed Clause Description of Amendment
1.1 5 January 2005 Reformatted to ARTC Standard
1.2 11 March 2005 Disclaimer Minor editorial change
1.3 1 September 2010 2, 6 Replaced reference to superseded NSW Standard BSS 02 with
applicable Australian Standard for tunnel fire safety
© Australian Rail Track Corporation Limited 2010
Disclaimer:
This document has been prepared by ARTC for internal use and may not be relied on by any other party without ARTC’s prior written consent. Use
of this document shall be subject to the terms of the relevant contract with ARTC.
ARTC and its employees shall have no liability to unauthorised users of the information for any loss, damage, cost or expense incurred or arising by
reason of an unauthorised user using or relying upon the information in this document, whether caused by error, negligence, omission or
misrepresentation in this document.
This document is uncontrolled when printed.
Authorised users of this document should visit ARTC’s intranet or extranet (www.artc.com.au) to access the latest version of this document.
Engineering (Electrical) Standard
PDS 14 High Voltage Cable Selection Guide
Contents
Contents
1 Scope and Application............................................................................. 3
2 References.............................................................................................. 3
3 Introduction ........................................................................................... 3
4 Preferred cable Sizes and Applications ................................................... 4
5 Continuous Ratings................................................................................. 5
5.1 11 kV Cables .................................................................................... 5
5.2 33kV Cables ..................................................................................... 6
6 Cables for use in Tunnels and Underground Stations .............................. 7
7 Conditions used in Determining Current Ratings .................................... 7
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Engineering (Electrical) Standard
PDS 14 High Voltage Cable Selection Guide
Scope and Application
1 Scope and Application
This publication sets out continuous ratings of common high voltage ac cables used by the
Australian Rail Track Corporation.
This publication is a guide for the selection of cables and cable configurations to suit particular
applications.
This publication also defines the preferred cable sizes to be used in order to reduce and
rationalise the number of different size cables in service.
The requirements of this publication are to be met for the future selection of all high voltage
cables.
2 References
• AS3008.1 Electrical installations - Selection of cables – Cables for alternating voltages up to
and including 0.6/1kV – Typical Australian installation conditions
• AS/NZS 1660. - Test methods for electric cables, cords and conductors
Method 5.2: Fire tests – Smoke density
Method 5.4: Fire tests – Determination of degree of acidity of gases evolved during the
combustion of materials taken from electric cables by measuring pH and conductivity
Method 5.6: Fire tests - Test for combustion propagation
• Applicable Australian Standard for tunnel fire safety
• BS EN 50268-1 Common test methods for cables under fire conditions - Measurement of
smoke density of cables burning under defined conditions.
• International Electrotechnical Commission Publication IEC 20A, 1978.
• Olex Cables - High Voltage XLPE Insulated Cables 08/82.
• CMA Power Cables - Paper Insulated, Lead and Aluminium Sheathed Cables up to 19/33kV
dated 12/2/87.
• EP 20 01 00 01 SP - 1500 Volt DC Cable Ratings. (RailCorp publication)
3 Introduction
Cable manufacturers usually provide continuous current rating data for cables direct buried, in
buried ducts and in air (in shade) conditions.
ARTC cables are often exposed to direct sun and installed in elevated steel troughing which
directly affects the current rating of the cable. This standard provides current rating data for the
aforementioned conditions.
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Engineering (Electrical) Standard
PDS 14 High Voltage Cable Selection Guide
Preferred cable Sizes and Applications
4 Preferred cable Sizes and Applications
The preferred 11kV and 33kV cable sizes to be used for future work are listed in Table 1. The
rationalisation of the cables sizes minimises spare parts requirements.
TABLE 1 - PREFERRED CABLE SIZES, CABLE CONSTRUCTION AND APPLICATION
VOLTAGE AREA INSULATION CABLE CONSTRUCTION APPLICATION
35 XLPE Single core, stranded compacted copper, Short cable runs
XLPE insulated, natural, dry cure CCV/VCV, between electrical
copper wire screen, PVC sheath, HDPE equipment.
oversheath, metre mark.
95 XLPE 3 core, stranded compacted copper, XLPE Feeder cable.
insulated, natural, dry cure CCV/VCV,
6.35/11kV individual copper wire screen, PVC sheath,
HDPE oversheath, metre mark.
150 XLPE 3 core, stranded compacted copper, XLPE Feeder cable.
insulated, natural, dry cure CCV/VCV,
individual copper wire screen, PVC sheath,
HDPE oversheath, metre mark.
50 XLPE Single core, stranded compacted copper, AC switchgear to
XLPE Insulated, natural, dry cure rectifier transformer.
CCV/VCV, copper wire screen, PVC sheath,
HDPE oversheath, metre mark.
150 XLPE Single core, stranded compacted copper, AC switchgear to
XLPE insulated, natural, dry cure CCV/VCV, rectifier transformer.
copper wire screen, PVC sheath, HDPE
oversheath, metre mark. Feeder cable.
150 XLPE 3 core, stranded compacted copper, XLPE Feeder cable.
insulated, natural, dry cure CCV/VCV,
individual copper wire screen, PVC sheath
HDPE oversheath, metre mark.
19/33kV 185 Paper Single core, stranded compacted copper, Feeder cable.
paper insulated ,MIND,lead sheath, PVC
oversheath, metre mark.
185 Paper 3 core, stranded compacted copper, paper Feeder cable.
insulated, MIND, HSL, steel wire armour,
PVC oversheath, metre mark.
240 XLPE Single core, stranded compacted copper, Feeder cable.
XLPE insulated, natural, dry cure CCV/VCV,
copper wire screen, PVCsheath, HDPE
oversheath, metre mark.
300 XLPE Single core, stranded compacted copper, Feeder cable.
XLPE insulated, natural, dry cure CCV/VCV,
copper wire screen, PVC sheath, HDPE
oversheath, metre mark.
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Engineering (Electrical) Standard
PDS 14 High Voltage Cable Selection Guide
Continuous Ratings
5 Continuous Ratings
5.1 11 kV Cables
11kV cables used on the ARTC system shall have minimum continuous current ratings as listed
in Table 2. The preferred cables sizes for future use are unshaded for easy identification.
TABLE 2 - 11kv CABLES - CONTINUOUS CURRENT RATINGS IN AMPS
Cores Continuous Current Rating In Amps
Insulation Type Area No. Direct In Buried In Air in In Air In Elevated
mm2 Buried Ducts Shade in Sun Steel Troughing
in Sun
XLPE 35 1 175 150 180 160 120
XLPE 35 3 165 145 160 150 120
XLPE 50 1 205 175 215 180 150
XLPE 50 3 195 170 190 175 145
XLPE 95 1 290 250 320 250 200
XLPE 95 3 270 240 275 230 200
XLPE 150 1 370 320 420 330 260
XLPE 150 3 345 305 360 310 260
XLPE 240 1 475 410 560 420 340
XLPE 240 3 440 385 480 390 340
Paper / Lead 25 3 90 80 75 75 65
Paper / Lead 50 1 170 155 160 155 120
Paper / Lead 50 3 160 140 140 140 120
Paper / Lead 95 1 250 255 245 250 180
Paper / Lead 95 3 240 205 210 210 180
Paper / Lead 150 1 325 285 325 290 230
Paper / Lead 150 3 305 255 280 265 230
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Engineering (Electrical) Standard
PDS 14 High Voltage Cable Selection Guide
Continuous Ratings
5.2 33kV Cables
33kV cables used on the ARTC system shall have minimum continuous current ratings as listed
in Table 3. The preferred cables sizes for future use are unshaded for easy identification.
TABLE 3 - 33KV CABLES - CONTINUOUS CURRENT RATINGS IN
Cores Continuous Current Rating In Amps
Insulation Type Area No. Direct In In Air In Air In Elevated
mm2 Buried Buried in in Sun Steel Troughing
XLPE 50 1 205 180 225 180 145
XLPE 50 3 190 170 195 170 145
XLPE 95 1 290 255 330 255 -
XLPE 95 3 270 240 280 240 205
XLPE 150 1 370 325 430 350 275
XLPE 150 3 340 305 370 310 260
XLPE 240 1 475 415 570 440 355
XLPE 240 3 440 390 485 425 340
XLPE 300 1 530 460 650 500 400
XLPE 300 3 485 430 550 470 375
XLPE 400 1 590 520 740 590 445
XLPE 400 3 540 480 620 530 -
XLPE 500 1 650 570 830 600 490
HSL Paper / Lead 0.20 in.2 3 255 225 210 210 140
2
HSL Paper / Lead 0.25 in. 3 285 255 250 235 155
2
Gas / Paper / Lead 0.25 in. 3 310 280 - - -
2
Gas / Paper / 0.25 in. 3 310 280 - - -
Aluminium
Paper / Lead 95 1 235 200 225 200 -
Paper / Lead 95 3 225 195 200 195 -
Paper / Lead 150 1 305 250 295 260 155
Paper / Lead 150 3 285 255 260 265 155
Paper / Lead 185 1 345 280 340 290 175
Paper / Lead 185 3 315 270 295 280 170
Paper / Lead 240 1 395 320 400 350 -
Paper / Lead 240 3 365 325 350 340 -
Paper / Lead 300 1 445 355 455 400 235
Paper / Lead 300 3 405 360 395 380 220
Paper / Lead 400 1 510 395 530 450 -
Paper / Lead 500 1 560 435 600 500 300
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Engineering (Electrical) Standard
PDS 14 High Voltage Cable Selection Guide
Cables for use in Tunnels and Underground Stations
6 Cables for use in Tunnels and Underground
Stations
Cables for installation in tunnels or underground stations must have a low smoke, low toxicity,
halogen free, flame retardant oversheath suitable for installation in damp situations. The
oversheath shall comply with the current version of AS 1660 Part 5.2, 5.4, 5.6 and the
applicable Australian Standard for tunnel fire safety.
Smoke Emission
When a sample of the complete cable is tested in accordance with BS EN 50268-1:2000, the
values for the light transmittance shall not fall below 60% at any time during the test.
Note: “MEGALON” is unsuitable for prolonged immersion in water or water saturated soils.
7 Conditions used in Determining Current Ratings
The conditions used in determining the continuous current ratings in the tables are:
General
Max. allowable Core Temperature: XLPE insulated cables 900C
Paper Insulated cables 700 C
Buried Cables: Soil Temperature (Ambient) 25°C
Soil Thermal Resistivity 1.2 K.m/W
Depth of Burial 800mm
Duct Diameter 150mm
Cables in Air: Air Temperature (Ambient) 40°C
Solar Radiation 1000W/m2
Cable Emissivity 0.7
Steel Trough Emissivity 0.3
Trough Size 150mm x 150mm
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