xlpe insulated power cable

XLPE INSULATED POWER CABLE

1

CONTENTINTRODUCTION ________________________________________________2

WHAT IS XLPE? ________________________________________________3

CHARACTERISTICS AND ADVANTAGES OF XLPE ___________________4

MANUFACTURING PROCESS OF XLPE CABLES ____________________5

STRUCTURAL DESIGN AND PERFORMANCE OF XLPE CABLES _______6

PROCESS OF XLPE CABLES _____________________________________7

TESTING PROCEDURES OF XLPE CABLES _________________________8

CABLE STRUCTURAL DESCRIPTION AND CONSTRUCTION DATA _____10

TECHNICAL DATA _____________________________________________44

INTRODUCTIONLeader Cable Industry Berhad was incorporated in 1976 as a private company prior to its merger with Universal Cable (M) Berhad in 1990 to form the single largest wire and cable manufacturer in the region. As part of Leader Universal Holdings Berhad (LEADER), a public company listed under the Kuala Lumpur Stock Exchange Malaysia, Leader Cable shares the group’s extensive network for synergistic integration in areas of cable technology.

Leader Cable, together with its subsidiary companies, cover a broad spectrum of products which includes telecommunication cables, data cables, XLPE and PVC power and cntrol cables, rubber insulated cables and electrical grade aluminium rods. Continued capital investment has enabled Leader Cable to extablish state-of-the-art facilities and utilize innovative improvements and refinements through critical selection of raw materials to produce better and more cost-effective products for its customers.

With a strong emphasis on customer satisfaction, Leader Cable is constantly expanding their product range to enhance its position as a major supplier of power and telecommunication cables to local industries and increase its prominence abroad.

This catalogue serves as a guide to LCIB’s manufacturing processes and standards in the manufacturing of XLPE cables.

WHAT IS XLPE?XLPE is an abbreviated designation of “cross-linked polyethylene”. Polyethylene has a linear molecular structure as shown in A. Molecules of polyethlene not chemically bonded as shown in B are easily deformed at high temperature, while XLPE molecules bonded in a three dimensional network as shown in C and D, have strong resistance to deformation even

at high temperature.

Cross linked polyethylene is produced from polyethylene under high pressure with organic peroxides as additives. The application of heat and pressure is used to

effect the cross linking. This causes the individual molecular chains to link with one another which in turn causes the material to change from a thermoplastic

to an elastic material.

An important advantage of XLPE as insulation for medium and high voltage cables is their low dielectric loss. The dielectric loss factor is about one decimal power lower than that of paper insulated cables and about two decimal powers lower than that of PVC- insulated cables. Since the dielectric constant is also more favourable, the mutual capacitance of XLPE cables is also lower, thus reducing the charging currents and earth-leakage currents in networks without the rigid star-point earthing.

H H H H H

H H H H H

C C C C C

A B

POLYETHYLENE

H H

HH

HH

H

HH

H

C

C

C

C

C

C

C

C

C D

XLPE

CHARACTERISTICS AND ADVANTAGES OF XLPE

Excellent Electrical and Physical Properties XLPE cable constitues the best cable for transmission and distribution lines because of its excellent eletrical and physical properties.

Capability of Carrying Large Currents The excellent resistance to thermal deformation and the excellent aging property of XLPE cable permit it to carry large currents under normal (90ºC), emergency (130ºC) or short circuit (250ºC) conditions.

Ease of InstallationXLPE cable withstands smaller radius bending and is lighter in weight, allowing for easy and reliable installation.Furthermore, the splicing and terminating methods for XLPE cable are simpler in comparison with other kinds of cables.

Free from Height Limitation and Maintenance XLPE cables can be installed anywhere without special consideration of the route profile (height limitations) since it does not contain oil and thus is free from failures due to oil migration in oil-filled cables.

No Metallic Sheath Required XLPE cable does not generally demand a metallic sheath. Thus it is free from the failures peculiar to metallic-sheathed cables, such as corrosion and fatigue.

MANUFACTURING PROCESS OF

XLPE CABLESIn the manufacture of medium and high voltage XLPE cable, our plant uses the latest technology available in the field by using an integrated high performance extrusion line

which consists of a triple-layer crosshead and a water-free Completely Dry Curing and Cooling (CDCC) gas vulcanizing process. This type of extrusion line minimises the

risk of introducing external contaminants and produces high quality XLPE cable.

The conductor is paid off continuously through a metering capstan (which is the line speed master point), a triple extruder crosshead, a vulcanizing tube,

an eccentricity monitoring unit, and haul-off caterpillars, and finally taken up.

Using a group of three extruders, the triple crosshead allows simoultaneous extrusion of the cable insulation and two semiconducting screens with a high degree of smoothness and no voids or introduction of external contaminants. Precise and stable temperature at the crosshead are achieved by using multiple zonre temperature controls.

In the water-free CDCC gas vulcanizing process, the triple-extruded cable core is cured in an inert pressurised gas tube and heated to the required

temperature for material cross-linking. By varying the curing temperature and time, different cure percentages can be achieved as per customer

requirements.

The various functions of our integrated

extrusion line such as line speed and curing tube temperature synchronisation are monitored and controlled via the process automation computers to ensure production of quality ramps. Calculated ramp parameters can be preset on the control unit and closed circuit TV system is used to ease the running of the lines.

STRUCTURAL DESIGN AND PERFORMANCE OF XLPE CABLES

The design of XLPE cables conform to international standards and are similar to those in IEC 60502 and IEC 60840/XLPE insulated cables for medium and high voltages have, in general, circular conductors and only single core construction is adopted for the latter. Conductors may be of compacted stranded aluminium or stranded copper and special care if taken to ensure a smooth profile, free from sharp juts that could damage the insulation due to high local electric stresses.

All XLPE insulated cables of Medium Voltage are supplied with extruded cross-linked semiconducting screens to protect the main solid XLPE insulation. The conductor screen fills the interstices between the wires and provide a smooth circular envelope around the conductor. This diminishes the concentration of flux lines around the individual wires and hence the electrical stress around the conductor. While the insulation screen can be either strippable or bonded for MV cables depending on the customer’s option, bonded screen is used exclusively for high voltage cables.

A layer of copper wires, applied over the extruded the insulation screen, as a metallic screen, provides an earthed envelope.The cross sectional area of this metallic screen is determined in order to satisfy the phase to earth fault level in the network.

PROCESS OF XLPE CABLES

Although it has been verified that XLPE cables can be applied with a conductor temperature of 130ºC for emergency overload conditions, it must be understood that the erecting and laying conditions necessary to allow for those temperatures must be accurately carried out and controlled during installation in order to restrict thermomechanical problems. To

be realistic, emergency conditions should be confined to 110ºC at conductor with the balance of 20ºC premeditated as a safety margin to cope with some concerns in the

laying conditions.

Subsequent to the constant use of XLPE for medium and high voltages for many years in the past, our plant has extensive field test results which

evidently witness that XLPE insulated cables are of excellent quality particularly in respect of:

• partial discharges withstandability • impulse test withstandability• moisture resistance • overload current-tests under dielectric stress and thermic cycles

TESTING PROCEDURES FOR XLPE CABLES

At our plant the testing process of XLPE cables and its accessories is subjected to the most stringent standards to ensure that our products meet the quality required for optimum problem free performance.

In this respect our plant uses advanced state of the art testing equipment in a strict series of test processes to achieve the exacting quality standards.

Among the main test equipment

1. Partial Discharge Test Sytem

2. Impulse Test System

3. Capacitance & Power Factor Measuring Bridge

4. A.C. High Voltage Test System

5. A.C. Long Time Test System

TESTING PROCEDURES FOR XLPE CABLES

VOLTAGE DESIGNATION;

Uo/U (Um)

The different tests employed are listed as such:

Routine TestsThese are tests to monitor overall cable quality and function. Tests listed here include high voltage tests, conductor resistance tests, insulation resistance tests and voltage tests on protective sheath coverings.

Type Tests These tests are used to calibrate and validate cable design type and they include

bending tests, thermal stability tests, impulse voltage tests, head distortion tests, corona level tests and dielectric thermal resistance tests.

Special TestsThese tests are conducted to ensure major design changes to cables conform to proper performance tresholds.

After Installation Tests These tests are to determine and ensure that cables installed are in optimum operating conditions. Conductor resistance test on the completed circuit verification tests of cross bonded systems and surge divertor tests are among the running lists of such critical test requirements.

The rated voltages for cables are expressed in the form Uo/U (Um).UoUUm

The voltage designation for British Standard is as follows:0.6/1.0 (1.2) - 1.9/3.3 (3.6) - 3.8/6.6 (7.2) - 6.35/11 (12) - 8.7/15 (17.5) - 12.7/22 (24) - 19/33 (36) kV

The voltage designation for IEC is as follows:0.6/1.0 (1.2) - 1.8/3.0 (3.6) - 3.6/6.0 (7.2) - 6/10 (12) - 8.7/15 (17.5) - 12/20 (24) - 18/30 (36) kV

10

0.6 / 1KV XLPE INSULATED UNAROMOURED CABLES Strandedcopper conductor

Shaped strandedaluminium conductor

XLPE insulation

XLPE insulation

Centre filler

Mylar tape

PVC sheath

PVC sheath

DESCRIPTIONSingle core and multi-core cables with copper or aluminium conductors XLPE insulated and PVC sheathed. Cables are rated 0.6 / 1 kV and conform to IEC 60502. (Refer to tables 6.1, 6.2, 6.3, 6.4, and 6.5)

CONSTRUCTION

Conductor Plain circular or sector stranded copper or aluminium conductors, conform to IEC 228 class 2.

Insulation XLPE (cross-linked polyethylene) rated 90°C.

Colour for core identification Single core - red (black on request)Two core - red & blackThree core - red, yellow and blueFour core - red, yellow, blue and black

Assembly Two, three or four insulated conductors are laid up together, if necessary filled with non-hygroscopic material compatible with the insulation. The filling may be omitted provided the outer shape of the cable remains practically circular and no adhesion occur between cores and sheath.

SheathPVC type ST2 to IEC 60502 colour black.

APPLICATIONSThese cables are designated for general use including underground burial, where they are not likely to suffer mechanical damage.

NOTE: Cables complying with BS 5467 and customer’s specification are available upon request, modifications, which serve to improve our products will be implemented without notice.

* Metallic sheath (Lead alloy ‘E’) and/or moisture barrier sheath (Laminated Aluminium foil) available upon request.

11

CONSTRUCTION DATA

Table 6.1 0.6 / 1kV SINGLE CORE XLPE INSULATED, PVC SHEATHED UNARMOURED CABLES

Conductor Nominal thickness of insulation

Nominal thickness of

sheath

Approx. overall diameter

Approx. cable weight

Nominal cross-sectional area Shape Copper Aluminium

mm2 mm mm mm kg/ km kg/ km

1.52.54610

1625355070

95120150185240

3004005006308001000

r.m.r.m.r.m.r.m.r.m.

c.c c.c c.c c.c c.c

c.c c.c c.c c.c c.c

c.c c.c c.c c.c c.c r.m.

0.70.70.70.70.7

0.70.90.91.01.1

1.11.21.41.61.7

1.82.02.22.42.62.8

1.41.41.41.41.4

1.41.41.41.41.4

1.51.51.61.61.7

1.81.92.02.22.32.4

6.16.57.17.68.6

9.611.312.614.016.0

18.219.922.224.427.5

30.334.037.742.542.452.5

526483

107153

217324423554771

10421293158919712574

32014070509865618327

10426

-----

115160195240325

420515630780995

122015351910248529103870

Table 6.2 0.6 / 1kV TWO CORE XLPE INSULATED, PVC SHEATHED UNARMOURED CABLES



sheath





1.52.54610

1625355070

95120150185240

300400

r.m.r.m.r.m.r.m.r.m.

c.c c.c

s.m.s.m.s.m.

s.m.s.m.s.m.s.m.s.m.

s.m.s.m.

0.70.70.70.70.7

0.70.90.91.01.1

1.11.21.41.61.7

1.82.0

1.81.81.81.81.8

1.81.81.81.81.8

1.92.02.22.32.5

2.62.9

10.110.912.013.115.0

17.217.018.721.024.0

26.929.933.437.141.7

45.851.6

134155200255365

49065585011101550

20902620323040205260

65408350

-----

285330395500660

8201030123515451900

23952940

12

Table 6.3 0.6 / 1kV THREE CORE XLPE INSULATED , PVC SHEATHED UNARMOURED CABLES



sheath





1.52.54610

1625355070

95120150185240

300400500

r.mr.mr.mr.mr.m

c.c.c.c.s.m.s.m.s.m.


s.m.s.m.s.m.

0.70.70.70.70.7

0.70.90.91.01.1

1.11.21.41.61.7

1.82.02.2

1.81.81.81.81.8

1.81.81.81.81.9

2.02.12.32.42.6

2.83.03.3

10.511.412.613.815.8

17.319.421.424.127.9

31.434.939.143.548.8

53.760.765.7

149185245320470

650935

123516102285

30903875478059607810

97001240015500

-----

345450560695965

12601560194023953080

376548105935

Table 6.4 0.6 / 1kV FOUR CODEXLPE INSULATED, PVC SHEATHED UNARMOURED CABLES



sheath





1.52.54610

1625355070

95120150185240

300400500

r.mr.mr.mr.mr.m

c.cc.c

s.m.s.m.s.m.


s.m.s.m.s.m.

0.70.70.70.70.7

0.70.90.91.01.1

1.11.21.41.61.7

1.82.02.0

1.81.81.81.81.8

1.81.81.81.81.9

2.02.12.32.42.6

2.83.03.3

10.511.412.613.815.8

17.319.421.424.127.9

31.434.939.143.548.8

53.760.765.7

149185245320470

650935

123516102285

30903875478059607810

97001240015500

-----

345450560695965

12601560194023953080

376548105935

13

Table 6.5 0.6 / 1kV FOUR CORE WITH REDUCED NEUTRAL CONDUCTOR, XLPE INSULATED, PVC SHEATHED UNARMOURED CABLES

Conductor

Nominal thickness of insulation


sheath

Approx. overall

diameter


Nominal cross-

sectional area

Shape

Nominal cross-

sectional area

ShapeCopper Aluminium

Phase Neutral Phase Neutral

mm2 mm2 mm mm mm mm kg/ km kg/ km

101625

355070

95120150

185240300

400500

r.mc.cc.c

s.ms.ms.m

s.ms.ms.m

s.ms.ms.m

s.ms.m

61016

162535

507070

95120150

185240

r.mr.mr.m

r.mr.mr.m

r.mr.mr.m

r.mr.mr.m

r.mr.m

0.70.70.9

0.91.01.1

1.11.21.4

1.61.71.8

2.02.2

0.70.70.7

0.70.90.9

1.01.11.1

1.11.21.4

1.61.7

1.81.81.8

1.81.81.9

2.12.22.3

2.52.72.9

3.13.4

17.318.921.7

24.127.731.7

35.839.844.4

49.655.861.7

68.879.0

5607801165

151519452840

365048505660

70459115

11300

1458018435

--

580

7408701300

139017802390

288536304440

58257325

Note : r.m. - circular stranded conductor c.c - compacted circular stranded conductor s.m. - second stranded conductor, circular conductors can be produced on request

14

Sectoral copper conductor

XLPE insulation

PVC bedding

Round steelwire armour

PVC sheath

Strandedcopper conductor

XLPE insulation

Centre filler

Double steel tapes

PVC sheath

DESCRIPTIONSingle core and multi-core cables with copper of aluminium conductors XLPE insulated, armoured and PVC sheathed Cables are rated 0.6 / 1kV and conform to IEC 60502. (Refer to tables 6.6, 6.7, 6.8, 6.9 and 6.10)

CONSTRUCTION

Conductor Plain circular or sector stranded copper or aluminium conductors, conform to IEC 228 class 2.

Insulation XLPE (cross-linked polyethylene) rated 90°C.

Colour for core identification Colour for core indentificationSingle core - red Two core - red & black Three core - red, yellow and blueFour core - red, yellow, blue and black

Assembly Two, three or four insulated conductor are laid up together, if necessary filled with non-hygroscopic material compatible with the insulation and covered with the layer of PVC bedding which may be an integral part of the filling.

Armoured Galvanized steel wires applied over the PVC bedding.


APPLICATIONSThese cables are most suitable for underground burial where there is a risk of mechanical damage.

NOTE: Cables complying with BS 5467 and customer’s specification are available upon request, modifications, which serve to improve our products will be implemented without notice.


0.6 / 1KV XLPE INSULATED AROMOURED CABLES

15

CONSTRUCTION DATA

Table 6.6 0.6 / 1kV SINGLE CORE, XLPE INSULATED,PVC SHEATHED ARMOURED CABLES

ConductorNominal

thickness of insulation

Nominal diameter of aluminium

wire


sheath

Approx. overall

diameter


Nominal cross-

sectional areaShape Copper Aluminium

mm² mm mm mm mm kg/ km kg/ km

507095120

150185240300

4005006308001000

c.cc.cc.cc.c

c.cc.cc.cc.c

c.cc.cc.cc.cc.c

1.01.11.11.2

1.41.61.71.8

2.02.22.42.62.8

1.251.251.251.60

1.601.601.601.60

2.002.002.002.502.50

1.81.81.81.8

1.81.81.91.9

2.12.22.32.52.7

20.021.021.825.8

27.730.032.735.1

40.043.548.253.962.5

760985

12601645

1970238530203665

474058307390954011860

460555660890

1040122014751725

22602705334543756350

Table 6.7 0.6/ 1 kV TWO CORE, XLPE INSULATEDPVC SHEATHED ARMOURED CABLES

ConductorNominal


Nominal diameter of steel wire


sheath

Approx. overall

diameter


Nominal cross-

sectional area

Shape Copper Aluminium


1.52.546

10162535

507095120

150185240300400

r.mr.mr.mr.m

r.mc.cc.cs.m

s.ms.ms.ms.m

s.ms.ms.ms.ms.m

0.70.70.70.7

0.70.70.90.9

1.01.11.11.2

1.41.61.71.82.0

0.80.80.80.8

1.251.251.61.6

1.61.62.02.0

2.02.52.52.52.5

1.81.81.81.8

1.81.81.81.7

1.82.02.12.2

2.32.52.72.83.1

14.014.916.017.1

19.020.323.224.9

27.130.534.237.5

40.945.950.854.861.2

350400475550

700860

12801525

1870245033104010

4740612076509115

11335

----

-655955

1075

1260157020902470

28453745450051606275


16

Table 6.8 0.6 / 1kV THREE CORE XLPE INSULATED ,PVC SHEATHED ARMOURED CABLES

ConductorNominal



wire


sheath

Approx. overall

diameter


Nominal cross-

sectional area



1.52.54610

1625355070

95120150185240

300400500

r.mr.mr.mr.mr.m

c.c.c.c.s.ms.ms.m

s.ms.ms.ms.ms.m

s.ms.ms.m

0.70.70.70.70.7

0.70.90.91.01.1

1.11.21.41.61.7

1.82.02.2

0.800.800.800.801.25

1.251.601.601.602.00

2.002.002.502.502.50

2.502.503.15

1.81.81.81.81.8

1.81.81.81.82.0

2.22.32.52.62.8

3.03.23.5

14.515.416.617.820.5

22.025.727.730.535.1

39.342.747.952.758.1

63.770.380.1

385450535640950

11801650201525203535

4565551069908120

10500

126951554020385

-----

8401165134016052215

27353200415045555770

67607950

10820

Table 6.9 0.6 / 1kV FOUR CORE XLPE INSULATED, PVC SHEATHED ARMOURED CABLES

ConductorNominal



wire


sheath

Approx. overall

diameter


Nominal cross-

sectional area



1.52.54610

1625355070

95120150185240

300400500

r.mr.mr.mr.mr.m

c.c.c.c.s.m.s.m.s.m.


s.m.s.m.s.m.

0.70.70.70.70.7

0.70.90.91.01.1

1.11.21.41.61.7

1.82.02.2

0.80.80.81.31.3

1.61.61.62.02.0

2.02.52.52.52.5

2.53.153.15

1.81.81.81.81.8

1.81.81.92.02.2

2.32.52.62.83.0

3.23.53.8

15.316.317.619.722.0

25.228.030.533.739.5

43.749.153.758.965.5

71.380.990.8

4355106158501100

15302030252531604555

579574858925

1083013720

165852158026150

-----

11201380162519452795

33554400513560807415

86751146013395


17

Table 6.10 0.6 / 1 kV FOUR CABLE WITH REDUCED NEUTRAL OCNDUCTOR, XLPE INSULATED, PVC SHEATHED ARMOURED CABLES

Conductor


Nominal diameter of steel wire

Nominal thickness of sheath

Approx. overall

diameter


Nominal cross-

sectional area

Shape

Nominal cross-

sectional area

ShapeCopper Aluminium

Phase Neutral Phase Neutral Neutral

mm2 mm mm mm mm mm kg/ km kg/ km

162535

507095

120150185

240300400500

c.c.c.c.s.m.

s.m.s.m.s.m.

s.m.s.m.s.m.

s.m.s.m.s.m.s.m.

101616

253550

707095

120150185240

r.m.r.m.r.m.

r.m.r.m.r.m.

r.m.r.m.r.m.

r.m.r.m.r.m.r.m.

0.70.90.9

1.01.11.1

1.21.41.6

1.71.82.02.2

0.70.70.7

0.90.91.0

1.11.11.1

1.21.41.61.7

1.251.61.6

1.62.02.0

2.02.52.5

2.52.52.5

3.15

1.81.81.8

1.92.12.2

2.32.52.7

2.93.03.33.6

25.228.030.5

33.739.543.7

49.153.758.9

65.571.380.990.8

127518802415

296043305415

715076759930

12390148451970023880

-12951640

188827903290

425544055770

690579851094512690

18

Stranded aluminium conductor

XLPE insulation

PVC bedding

Round hard drawn aluminium wire armour

PVC outersheath

DESCRIPTIONSingle core and multi-core cables with copper or aluminium conductors XLPE insulated, armoured and PVC sheathed.Cables are rated 1.8 / 3kV and conform to IEC 60502. (Refer to tables 6.11 and 6.12)

CONSTRUCTION

Conductor Plain circular stranded copper or aluminium conductors, conform to IEC 228 class 2.

Insulation XLPE (cross-linked polyethylene) rated 90°C

Colour for core identification Single core - redThree core - red, yellow and blue

Assembly Three insulated conductors are laid up together, if necessary filled with non-hygroscopic material compatible with the insulation and covered with a layer of PVC bedding which may be an integral part of the filling.

Armoured Galvanized steel wires applied over the PVC bedding.


APPLICATIONSThese cables are most suitable for underground burial where there is a risk of mechanical damage.

NOTE : Cables complying with BS 5467 and customer’s specification are available upon request. Modifications which serve to improve our products wil be implemented without notice.


1.8 / 3KV XLPE INSULATED ARMOURED CABLES

19

CONSTRUCTION DATA

Table 6.11 1.8 / 3.0 (3.6)kV SINGLE COREXLPE INSULATED, PVC SHEATHED ARMOURED CABLES

ConductorNominal



wire


sheath

Approx. overall

diameter


Nominal cross-

sectional area



16253550

7095120150

185240300400

5006308001000

c.c.c.c.c.c.c.c.

c.c.c.c.c.c.c.c.

c.c.c.c.c.c.c.c.

c.c.c.c.c.c.r.m.

2.02.02.02.0

2.02.02.02.0

2.02.02.02.0

2.22.42.62.8

0.801.251.251.25

1.251.601.601.60

1.601.601.602.00

2.002.002.502.50

1.81.81.81.8

1.81.81.81.8

1.81.92.02.1

2.22.32.52.7

17.019.019.521.2

22.726.027.529.0

31.033.536.040.0

43.548.253.962.5

450610680830

1060153017252030

2415306037504750

58357390954011860

350450460532

6309309701100

1250151518102270

2710334543756350

Table 6.11 1.8 / 3.0 (3.6)kV THREE COREXLPE INSULATED, PVC SHEATHED ARMOURED CABLES

ConductorNominal



wire


sheath

Approx. overall

diameter


Nominal cross-

sectional area



16253550

7095120150

185240300400500

c.c.c.c.c.c.c.c.

c.c.c.c.c.c.c.c.

c.c.c.c.c.c.c.c.c.c.

2.02.02.02.0

2.02.02.02.0

2.02.02.02.02.2

1.61.61.62.0

2.02.02.52.5

2.52.52.52.5

3.15

1.81.91.92.1

2.22.32.42.5

2.72.83.03.23.6

30.032.535.539.5

43.047.052.055.5

60.065.070.577.087

1250213026803520

4300530067707800

931011500138001690021970

945164520052605

2980347044554960

5745677078659310

12405


20

6 5 4 3 2 1

DESCRIPTIONCircular straded compacted or aluminium conductor, XLPE insulated, with copper wire or copper tape screen and PVC outer sheath. Complies with IEC 60502 (Refer to tables 6.13 and 6.14)

CONSTRUCTION

1. Conductor Plain circular compacted copper or alumimium conductor to IEC 228 class 2.

2. Conductor ScreenExtruded semiconductive compound

3. Insulation XLPE (cross-linked polyethylene) rated 90°C

Insulation screen4. Non-metallic partExtruded layer of semiconductive material.

Insulation screen5. Metallic part Copper wire or copper tape screen

6. Outer sheathPVC type ST2 to IEC 60502 colour black

APPLICATIONSFor installation on trays, ducts or direct burial.

NOTE : Cables complying with BS 6622 and customer’s specification are available upon request. Modifications which serve to improve our products will be implemented without notice.


3.6 / 6KV INSULAED SINGLE CORE CABLES

21

CONSTRUCTION DATA

Table 6.13 3.6/ 6.0 (7.2)kV SINGLE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor

Nominal diameter of conductor


ScreeningNominal

thickness of sheath

Approx. overall

diameter

Approx. weight of cable


SC layer

Approx. thickness of

Cu tape Copper Aluminium

mm2 mm mm mm mm mm mm kg/ km kg/ km

25355070

95120150185

240300400500

6308001000

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

30.534.337.6

2.52.52.52.5

2.52.52.52.5

2.62.83.03.2

3.23.23.2

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

0.10.10.1

1.51.51.61.6

1.71.71.81.8

1.92.02.12.2

2.32.52.6

18.019.021.022.0

24.026.027.029.0

32.035.039.043.0

48.050.251.4

550655810

1040

1335159518902275

2875355544105535

69958750

-

395435515610

7408409651110

1330162019302410

295036204265

Table 6.13 3.6/ 6.0 (7.2)kV SINGLE CORE XLPE INSULATED WITH COPPER WIRE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor/ screen



Screening

Approx. overall

diameter


Thickness of extruded SC

layer


sheathCopper Aluminium

mm2 mm mm mm mm kg/ km kg/ km

25 / 1635 / 1650 / 1670 / 16

95 / 16120 / 16150 / 25185 / 25

240 / 25300 / 25400 / 35500 / 35

630 / 35800 / 501000 / 50

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

30.534.337.6

2.52.52.52.5

2.52.52.52.5

2.62.83.03.2

3.23.23.2

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.60.6

1.51.61.61.6

1.71.71.81.8

1.92.02.12.2

2.32.52.6

20212426

28303133

36394246

505458

675800980

1225

1505178521502550

3170384048555910

73659210

-

515580680795

905103012201385

1625190023752785

332040804725

22

8 67 5 4 3 2 1

DESCRIPTIONStranded circular compacted copper or aluminium conductors, XLPE insulated, copper tape screened, three cores assembled together with non-hygroscopic polypropylene fillers, covered with extruded bedding, armoured or unarmoured and PVC sheathed Cables comply with IEC 60502. (Refer to tables 6.15 and 6.16)

CONSTRUCTION

1. Conductor Plain circular compacted copper or aluminium conductor to IEC 228 class 2.

2. Conductor Screen Extruded semiconductive compound.


Insulation screen 4. Non-metallic partExtruded layer of semiconductive material

Insulation screen5. Metallic part Copper tapes 0.10mm thickness

6. BeddingTaped bedding for unarmoured cables, extruded PVC bedding for armoured cables.

7. ArmourGalvanized steel wires/ tapes applied helically over the PVC bedding.

8. Outer sheathPVC types ST2 to IEC 60502 colour black.

Colour for core identificationRed, yellow and blue narrow tapes applied between non metallic and metallic part of insulation screen.

APPLICATIONSThese cables are generally suitable for direct burial or for installation on trays or ducts. Where there is a risk of mechanical damage, armoured cables should be used.



3.6 / 6KV XLPE INSULATED THREE CORE CABLES

23

CONSTRUCTION DATA

Table 6.15 3.6 / 6(7.2)kV THREE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal thickness of sheath

Approx. overall

diameter



SC layer




25355070

95120150185

240300400500

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

2.52.52.52.5

2.52.52.52.5

2.62.83.03.2

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

2.12.12.22.3

2.52.62.72.8

3.03.23.43.6

35.037.040.044.0

48.052.055.059.0

65.072.079.087.0

1540190023903130

4060491058207060

8990111001400017300

1060123014801810

2230260029803500

4260517064107735

Table 6.16 3.6 / 6 (7.2) kV THREE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED ARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter



SC layer




25355070

95120150185

240300400500

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

2.52.52.52.5

2.52.52.52.5

2.62.83.03.2

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

2.02.52.52.5

2.52.52.52.5

2.53.153.153.15

2.32.42.52.6

2.72.93.03.1

3.33.53.84.0

45485155

59636670

768593

101

3225398043354920

5545618068257560

8700112001299015190

24

6 5 4 3 2 1

DESCRIPTIONCircular stranded compacted copper or aluminium conductor, XLPE insulated, with copper tape screen and PVCouter sheath. Complies with IEC 60502 ( Refer to tables 6.17 and 6.18)

CONSTRUCTION


2. Conductor Screen Extruded semiconductive compound



Insulation screen5. Metallic part Copper wire of copper tape screen

6. Outer SheathPVC type ST2 to IEC 60502 colour black.




6 / 10KV XLPE INSULATED SINGLE CORE CABLES

25

CONSTRUCTION DATA

Table 6.17 6 / 10 (12) kV SINGLE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor




Approx. overall

diameter



SC layer




25355070

95120150185

240300400500

6308001000

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

30.534.337.6

3.43.43.43.4

3.43.43.43.4

3.43.43.43.4

3.43.43.4

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

0.10.10.1

1.61.61.61.7

1.71.81.81.9

2.02.02.22.2

2.42.52.6

20.021.023.024.0

26.028.029.031.0

34.037.040.043.0

48.051.054.4

6157458901130

1425169521502520

3015363045105565

70508815

-

460525590700

83094012251355

1470169020302440

300536854320

Table 6.18 6 / 10 (12) kV SINGLE CORE XLPE INSULATED WITH COPPER WIRE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter


Thickness of extruded SC layer Copper Aluminium


25 / 1635 / 1650 / 1670 / 16

95 / 16120 / 16150 / 25185 / 25

240 / 25300 / 25400 / 35500 / 35

630 / 35800 / 501000 / 50

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

30.534.337.6

3.43.43.43.4

3.43.43.43.4

3.43.43.43.4

3.43.43.4

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.60.6

1.61.61.71.7

1.81.81.91.9

2.02.12.22.3

2.42.52.7

22232628

30323335

38404346

505559

745860

10651300

1600187022552640

3280393049005940

74259280

-

590640765870

1000111513251475

1735199024202815

338041504820

26

8 67 5 4 3 2 1

DESCRIPTIONStranded circular compacted copper or aluminium conductors, XLPE insulated, copper tape screened, three cores assembled together with non-hygroscopic polypropylene fillers, covered with extruded bedding, armoured or unarmoured and PVC sheathed. Cables comply with IEC 60502. (Refer to tables 6.19 and 6.20)

CONSTRUCTION





Insulation screen5. Metallic part Copper tapes 0.10 mm thickness

6. BeddingTaped bedding or extruded PVC bedding

7. ArmourGalvanized steel wires/ tapes applied helically over the PVC bedding.




NOTE : NOTE: Cables complying with BS 6622 and customer’s specification are available upon request. Modifications which serve to improve our products will be implemented without notice.


6 / 10KV XLPE INSULATED THREE CORE CABLES

27

CONSTRUCTION DATA

Table 6.19 6 / 10(12)kV THREE CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter



SC layer




25355070

95120150185

240300400500

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

3.43.43.43.4

3.43.43.43.4

3.43.43.43.4

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

2.22.32.42.5

2.62.72.82.9

3.13.33.53.7

39.042.045.049.0

53.056.060.064.0

69.075.081.088.0

1830222027303500

4410531062507510

9440115001430017600

1350155018202180

2580300034103950

4710557067108030

Table 6.20 6 / 10(12)kV THREE CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED ARMOURED CABLES

Nominal cross-

sectional area of

conductor


Nominal thickness

of insulation

Screening Nominal diameter of steel

wire


Approx. overall

diameter



SC layer

Approx. thickness of Cu tape

Copper Aluminium

mm2 mm mm mm mm mm mm mm kg/ km kg/ km

25355070

95120150185

240300400500

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

3.43.43.43.4

3.43.43.43.4

3.43.43.43.4

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

2.52.52.52.5

2.52.52.52.5

3.153.153.153.15

2.52.62.72.8

2.93.03.13.3

3.53.73.94.1

52535660

64677175

828998

102

4790520056306680

78709020

1073511750

15060177052172525025

4300452547152360

6040670578908185

10330117701413515460

28

6 5 4 3 2 1

DESCRIPTIONCircular stranded compacted copper or aluminiun conductor, XLPE insulated, with copper wire of copper tape screen and pvc outer sheath. Complies with IEC 60502 (Refer to tables 6.21 and 6.22)

CONSTRUCTION






6. Outer sheathPVC type ST2 to IEC 60502 colour black




8.7 / 15(17.5)KV XLPE INSULATED SINGLE CORE CABLES

29

CONSTRUCTION DATA

Table 6.21 8.7 / 15(17.5)kV SINGLE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor


Nominal thickness

of insulation


Approx. overall

diameter



SC layer




35507095

120150185240

300400500630

8001000

7.18.39.911.7

13.214.616.418.8

21.023.826.730.5

34.337.6

4.54.54.54.5

4.54.54.54.5

4.54.54.54.5

4.54.5

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

0.10.1

1.71.71.81.8

1.91.92.02.1

2.12.22.32.4

2.62.7

24.025.027.028.0

30.032.034.037.0

39.042.045.051.0

53.457.2

845990

12401535

1825211025453165

3790465557557295

9020-

625690810940

1070118013801620

1850217526303250

38904560

Table 6.22 8.7 / 15(17.5)kV SINGLE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter




35 / 1650 / 1670 / 1695 / 16

120 / 16150 / 25185 / 25240 / 25

300 / 25400 / 35500 / 35630 / 35

800 / 501000 / 50

7.18.39.911.7

13.214.616.418.8

21.023.826.730.5

34.337.6

4.54.54.54.5

4.54.54.54.5

4.54.54.54.5

4.54.5

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.6

1.71.71.81.8

1.91.92.02.1

2.12.32.42.5

2.62.7

27293133

34363840

43464953

5761

955115014051700

1985238027803420

4075506561107565

9480-

7358509751100

1230145016151875

2135258529853520

43505015

30

8 67 5 4 3 2 1

DESCRIPTIONStranded circular compacted copper or aluminium conductors, XLPE insulated, copper tape screened, three cores assembled together with non-hygroscopic polypropylene fillers, covered with extruded bedding, armoured or unarmoured and PVC sheathed. Cables comply with IEC 60502. (Refer to tables 6.23 and 6.24)

CONSTRUCTION






6. BeddingTaped bedding or extruded PVC bedding.

7. ArmourGalvanized steel wires/tapes applied helically over the PVC bedding.






8.7 / 15KV XLPE INSULATED THREE CORE CABLES

31

CONSTRUCTION DATA

Table 6.23 8.7 / 15(17.5)kV THREE-CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter



SC layer




25355070

95120150185

240300400500

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

4.54.54.54.5

4.54.54.54.5

4.54.54.54.5

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

2.42.52.62.7

2.82.93.03.1

3.33.53.73.9

45.047.051.054.0

59.062.065.070.0

75.081.087.094.0

2180256031003910

4890579067408020

10100121001490018300

1700189021902590

3060348039004460

5370617073108730

Table 6.24 8.7 / 15(17.5)kV THREE-CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED ARMOURED CABLES

Nominal cross-

sectional area of

conductor


Nominal thickness

of insulation

ScreeningNominal diameter of steel

wire


Approx. overall

diameter



SC layer

Approx. thickness

of Cu tape

Copper Aluminium


25355070

95120150185

240300400500

6.07.18.39.9

11.713.214.616.4

18.821.023.826.7

4.54.54.54.5

4.54.54.54.5

4.54.54.54.5

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

2.52.52.52.5

2.52.5

3.153.15

3.153.153.153.15

2.62.72.93.0

3.13.23.43.5

3.63.84.14.3

55586165

69737882

8894

104108

5035562063407410

866097801188013510

16010187002281026100

4550494554256090

6830746590409945

11280127651522016530

32

12 / 20KV XLPE INSULATED SINGLE CORE CABLES

6 5 4 3 2 1

DESCRIPTIONCircular stranded compacted copper or aluminium conductor, XLPE insulated, with copper wire or copper tape screen and PVC outer sheath. Complies with IEC 60502 (Refer to tables 6.25 and 6.26)

CONSTRUCTION

1. Conductor Plain circular compacted copper or aluminium conductor to IEC 228 class 2





6. Outer SheathPVC type ST2 to IEC 60502 colour black




33

CONSTRUCTION DATA

Table 6.25 12 / 20(24)kV SINGLE CORE XLPE INSULATED WITH COPPER TAPE SCREENED AND PVC SHEATHED UNARMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter



SC layer




35507095

120150185240

300400500630

8001000

7.18.39.911.7

13.214.616.418.8

21.023.826.730.5

34.337.6

5.55.55.55.5

5.55.55.55.5

5.55.55.55.5

5.55.5

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.10.1

0.10.1

1.71.81.81.9

1.92.02.02.1

2.22.32.42.5

2.62.8

26.027.029.031.0

32.034.036.038.0

41.044.048.053.0

55.459.4

935109013401655

1925227026653280

3915477559307480

9195-

7157909101055

1170134015001735

1975229528053435

40654770


Nominal cross-

sectional area of

conductor/ screen



Screening


Approx. overall

diameter




35 / 1650 / 1670 / 1695 / 16

120 / 16150 / 25185 / 25240 / 25

300 / 25400 / 35500 / 35630 / 35

800 / 501000 / 50

7.18.39.911.7

13.214.616.418.8

21.023.826.730.5

34.337.6

5.55.55.55.5

5.55.55.55.5

5.55.55.55.5

5.55.5

0.60.60.60.6

0.60.60.60.6

0.60.60.60.6

0.60.6

1.81.81.91.9

2.02.02.12.1

2.22.32.42.5

2.72.8

30313335

36384043

45485155

5963

1100125015101810

2105249029053560

4230522562857765

9650-

880950

10801210

1350156017402015

2290274531603720

45205225

34


8 67 5 4 3 2 1

DESCRIPTIONCircular stranded compacted copper or aluminium conductors, XLPE insulated, copper tape screened, three cores asembled together with non-hygroscopic polypropylene fillers, covered with extruded bedding, armoured or unarmoured and PVC sheathed. Cables comply with IEC 60502. (Refer to tables 6.27 and 6.28)

CONSTRUCTION









Colour for core identificationRed, yellow and blue narrow tapes applied between non-metallic and meatallic part of insulation screen.

APPLICATIONSThese cables are generally suitable for direct burial or for installation on trays of ducts. Where there is a risk of mechanical damage, armoured cables should be used.



35

CONSTRUCTION DATA

Table 6.27 12 / 20(24)kV THREE CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED UNAROMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter



SC layer


Copper Aluminium


35507095

120150185240

300400500

7.18.39.911.7

13.214.616.418.8

21.023.826.7

5.55.55.55.5

5.55.55.55.5

5.55.55.5

0.60.60.60.6

0.60.60.60.6

0.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.1

2.62.72.83.0

3.13.23.33.5

3.63.94.1

53.056.060.064.0

68.071.075.080.0

87.093.0

101.0

3165364045455565

65607570891511050

132951623519200

2490272532253735

4245472553506320

736086459635

Table 6.28 12 / 20(24)kV THREE CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED AROMOURED CABLES

Nominal cross-

sectional area of

conductor


Nominal thickness

of insulation


wire


Approx. overall

diameter



SC layer


Copper Aluminium


35507095

120150185240

300400500

7.18.39.911.7

13.214.616.418.8

21.023.826.7

5.55.55.55.5

5.55.55.55.5

5.55.55.5

0.60.60.60.6

0.60.60.60.6

0.60.60.6

0.10.10.10.1

0.10.10.10.1

0.10.10.1

2.52.52.52.5

2.53.153.153.15

3.153.153.15

2.93.03.13.2

3.43.53.63.8

4.04.24.4

63667074

79838793

99105112

6275700080509355

11400126351434516920

196552306027060

5600608567307525

909097901078012190

137201547017490

36

18 / 30KV XLPE INSULATED SINGLRE CORE CABLES

6 5 4 3 2 1

DESCRIPTIONCircular stranded compacted copper or aluminium conductor, XLPE insulated, with copper wire or copper tape screen and PVC outer sheath. Complies with IEC 60502 (Refer to tables 6.29 and 6.30)

CONSTRUCTION






6. Outer SheathPVC type ST2 to IEC 60502 colour black




37

CONSTRUCTION DATA


Nominal cross-

sectional area of

conductor




Approx. overall

diameter



SC layer




507095

120150185

240300400

5006308001000

8.39.911.7

13.214.616.4

18.821.023.8

26.730.534.337.6

8.08.08.0

8.08.08.0

8.08.08.0

8.08.08.08.0

0.60.60.6

0.60.60.6

0.60.60.6

0.60.60.60.6

0.10.10.1

0.10.10.1

0.10.10.1

0.10.10.10.1

2.02.02.1

2.12.22.2

2.32.42.5

2.62.72.83.0

33.035.036.0

38.040.041.0

44.047.050.0

53.059.060.865.0

138016501995

228526203035

367045305300

645580059710

-

108012301395

153016901870

212525902820

3330396045805335


Nominal cross-

sectional area of

conductor


Nominal thickness

of insulation


Approx. overall

diameter




50 / 1670 / 1695 / 16

120 / 16150 / 25185 / 25

240 / 25300 / 25400 / 35

500 / 35630 / 35800 / 501000 / 50

8.39.911.7

13.214.616.4

18.821.023.8

26.730.534.337.6

8.08.08.0

8.08.08.0

8.08.08.0

8.08.08.08.0

0.60.60.6

0.60.60.6

0.60.60.6

0.60.60.60.6

2.02.02.1

2.12.22.2

2.32.42.5

2.62.72.93.0

363840

414345

485053

57606569

153017802120

241028203255

391046205645

67308210

10195-

123013501520

165518902070

236526903165

3605416550655785

38


8 67 5 4 3 2 1

DESCRIPTIONStranded circular compacted copper or aluminium conductors, XLPE insulated, copper tape screened, three cores assembled together with non-hygroscopic polyprpylene fillers, covered with extruded bedding, armoured or unarmoured and PVC sheathed. Cables comply with IEC 60502. ( Refer to tables 6.31 and 6.32)

CONSTRUCTION









Colour for core identificationRed, yellow and blue narrow tapes applied between non-metallic and meatallic part of insulation screen.




39

CONSTRUCTION DATA

Table 6.31 18 / 30(36)kV THREE CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED UNAROMOURED CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter



SC layer


Copper Aluminium


507095

120150185

240300400

8.99.911.7

13.214.616.4

18.821.023.8

8.08.08.0

8.08.08.0

8.08.08.0

0.60.60.6

0.60.60.6

0.60.60.6

0.10.10.1

0.10.10.1

0.10.10.1

3.13.23.3

3.53.63.7

3.84.04.2

67.071.075.0

79.082.086.0

92.098.0

100.0

478556906775

78158880

10290

124751485017895

387043704945

550060406725

7745892010305

Table 6.32 18 / 30 (36)kV THREE CORE XLPE INSULATED WITHCOPPER TAPE SCREENED AND PVC SHEATHED AROMOURED CABLES

Nominal cross-

sectional area of

conductor


Nominal thickness

of insulation


wire


Approx. overall

diameter



SC layer


Copper Aluminium


507095

120150185

240300400500

8.39.911.7

13.214.616.4

18.821.023.826.7

8.08.08.0

8.08.08.0

8.08.08.08.0

0.60.60.6

0.60.60.6

0.60.60.60.6

0.10.10.1

0.10.10.1

0.10.10.10.1

3.153.153.15

3.153.153.15

3.153.153.153.15

3.43.63.7

3.83.94.0

4.24.44.64.8

798388

919499

104111118124

96951092012255

135401488016610

19230221302596029820

8780960010425

112251204013045

14500161951837020250

40

76 / 132KV INSULATED SINGLE CORE CABLES

7 6 5 4 3 2 1

DESCRIPTIONCircular stranded compacted copper or aluminium conductor, XLPE insulated, with copper wire screen and PE outer sheath. Complies with Tenaga Nasional Berhad (TNB) Specification. (Refer to table 6.33)

CONSTRUCTION


2. Conductor Screen Extruded semi-conductive thermo-setting compound

3. Insulation Extruded superclean XLPE (cross-linked polyethylene)

4. Insulation screen Extruded semi-conductive cross-linked polyethylene compound. It is firmly bonded to the insulation by virtue of the simultaneous cross linking of insulation

The conductor screen, insulation and insulation screen are extruded by simultaneous triple extrusion process.

5. Metallic screenConcentric round uncoated copper wires applied helically and shall be capable of carrying an earth-fault current of 25kA for 3 seconds

6. Radial water barrierLaminated Aluminium Tape applied longitudinally or lead extruded

7. Outer sheath Extruded black PE containing an effective termite repellant

APPLICATIONSFor installationon trays, ducts of direct burial.



41

CONSTRUCTION DATA

Table 6.33 76 / 132kV SINGLE CORE XLPE INSULATED WITHCOPPER WIRE SCREENED AND PE SHEATHED POWER CABLES

Nominal cross-

sectional area of

conductor



ScreeningNominal

thickness of sheath

Approx. overall

diameter




300 / 300400 / 300500 / 300

630 / 300800 / 3001000 / 300

20.923.626.5

30.235.639.0

20.020.020.0

20.020.020.0

1.31.31.3

1.31.31.3

4.04.04.0

4.04.04.0

899294

99102107

106551170012890

145601648018770

873092209760

105151134512280

42

MILLIKEN CONDUCTOR The conductor of this cable is achieved by using a shaped segmental conductor design. Our design consists of five stranded sector shape conductor segments with one central circular conductors separated by semi-conducting tape used to avoid “Skin Effect” for an improve current carrying capacity. The conductor also features water-sealed properties which prevent moisture ingress into and along the conductor for improve cable reliability and durability.

CONSTRUCTION

Conductor The conductor of this cable is achieved by using a shaped segmental conductor design. It consists of five stranded sector shape conductor segments with one central circular conductors.

Conductor screenExtruded semi-conductive thermo-setting compound

Insulation Extruded superclean cross-linked polyethylene (XLPE)

Insulation screenExtruded semi-conductive cross-linked polyethylene compound. It is firmly bobded to the insulation by virtue of the simultaneous cross-linking of insulation

Metallic screenConcentric round uncoated copper wires applied helically and shall be capable of carrying an earth-fault current of 25kA for 3 second.

Radial water barrierLaminated aluminium tape applied longitudinally or lead extruded

OutersheathExtruded black PE containing an effective termite repellentGraphite coating is provided to cater for on-site test.

43

CONSTRUCTION DATA

76 / 132 kV MILLIKEN CONDUCTOR XLPE INSULATED WITH COPPER WIRE SCREENEDAND PE SHEATHED POWER CABLES

Nominal cross-sectional area of

conductor



Nominal area of Cu. Wire Screening


sheath

Nominal overall diameter

Nominal weight of cable

mm2 mm mm mm2 mm mm kg/ km

12001600

43.450.0

20.020.0

300300

4.04.0

110.8117.0

21149.025510.6

Nominal cross-sectional area of

conductor

Conductor resistance at 20°C Reactance Capacitance Current carrying capacity *

mm2 ohm / km ohm / km microF/km kA

12001600

0.01510.0113

0.1700.108

0.250.27

min. 1.23min. 1.23

or 282 MVAor 282 MVA

* The current carrying capacity are based on the following condition

Maximum conductor temperature : 90° C Maximum ambient temperature : Air 37.2°C : Ground 30°CGround thermal resistivity : 1.2ºC m/W Laying depth : 1.2m

44

TECHNICAL DATACURRENT CARRYING CAPACITY

The Current Carrying Capacity given in the following tables are based on the assumptions shown below:

(1) Max. Conductor Temperature .............................................................................................................................. 90°C

(2) Max. Ambient Temperature: In Air ..................................................................................................... 25°C In Ground .............................................................................................. 15°C

(3) Ground Thermal Resistivity .......................................................................................................................1.2°C m/W

(4) Laying Depth: For Voltage up to 1kV ........................................................................... 0.5m For Higher Voltages above 1kV ............................................................ 0.8m

(5) Spacing Between Cables Laid: In Flat Formation ...................................... 2 times of cable overall diameter In Trefoil ......................................................................... with cable touching

(6) For other conditions, the rating factors included should be applied.

TABLE 7.1 CURRENT RATINGS FOR 0.6 / 1kV ARMOURED XLPE CABLES

Conductor size (mm2)

In Air In ground

Single-corea

2-core (A) 3- or 4- core (AA)

Single-corea

2-core (A) 3- or 4- core (AA)Trefoil (A) Flat (A) Trefoil (A) Flat (A)

Copper Conductors

1625355070

951201501852400

300400500630800

1000

---

217277

340395454522615

70080090510191107

1202

---

279350

425488543610700

775834910986

1032

1098

118154190229288

355411469541639

728838

---

-

101132162196247

305353404465549

626720

---

-

---

231284

340386431485558

623691765841888

942

---

241295

350395485482545

597637688737760

797

141183219259317

381433185547632

708799

---

-

119152182217266

319363406458529

592667

---

-

Aluminium Conductors

1625355070

95120150185240

300

---

162208

255295340392464

532

---

209264

322370417473550

619

90114141169213

263----

-

76100122147186

229266305352417

478

---

177218

260296331374433

486

---

185227

270306339380435

483

108138165196240

288----

-

91116139165203

244278311353409

461

45

Table 7.2 CURRENT RATINGS FOR 1.8 / 3kV ARMOURED XLPE CABLES


In Air In ground

Single-corea

3-core (A)Single-corea

3-core (A)Trefoil (A) Flat (A) Trefoil (A) Flat (A)

Copper Conductors

1625355070

95120150185240

300400500630800

1000

---

226282

346402457523616

702800905

10191107

1202

---

285358

440512585673801

9251081125514611683

1902

106140166201252

309359409471556

639740

---

-

---

222271

324366409460528

589651720789831

880

---

232284

341388436493573

648741844961

1085

1203

114147175207254

305347390441510

576653

---

-


1625355070

95120150185240

300

---

169212

259302343394465

533

---

214268

328382434501595

686

80105125151190

233270307355420

484

---

170208

248282315355410

460

---

178217

260297332377438

495

87113134158194

233266298338392

444

a Single-core cables with aluminium wire armour

46

Table 7.3 CURRENT RATINGS FOR 3.6 / 6kV TO 8.7 / 15kV ARMOURED XLPE CABLES


In Air In ground

Single-corea



Copper Conductors

25 b35 b50 b70

95120150185240

300400500630800

1000

--

235285

360415470540640

74084094011101270

1400

--

295370

455520600690820

9401100128015001740

1960

145175220270

330375430490570

650740

---

-

--

220270

320360410455520

580650710760810

860

--

230280

335380430485560

640730830940

1070

1180

140170210255

300340380430490

540600

-

-


25 b35 b50 b70

95120150185240

300400500630800

--

180225

260320365425500

580670790910

1052

--

230290

350410465530640

730860

101011901400

115140170210

250295330385450

510590

---

--

170210

250280315355405

455510570640769

--

175215

260295330375440

495570650750

-

115135160195

230265300335380

435490

---

a Copper wire screened, unarmouredb Not applicable to all voltages, see dimension tables for availability

47

Table 7.4 CURRENT RATINGS FOR 12 / 20kV TO 18 / 30Kv ARMOURED XLPE CABLES


In Air In ground

Single-corea



Copper Conductors

35507095120

150185240300400

5006308001000

-245300360425

485550650740850

980113012901430

-295365450520

590670800920

1070

1250145016901910

180225275330380

430490570650740

----

-220270320360

410460530600690

760850930

1010

-230280335380

430485560640730

830950

10701190

170210255295335

375420480530590

----


35507095120

150185240300400

5006308001000

-190235280330

375430510580680

790920

10701210

-230285345400

455520620710840

980108013601560

145175215260300

335390460520600

----

-170210250280

320360415475550

610690780860

-175215260295

330375440495570

650750860970

135160195230260

290330380425480

----

a Copper wire screened, unarmoured

48

Table 7.5 CURRENT RATINGS FOR132 kV SINGLE CORE UNARMOURED XLPE CABLES

Conductor size (mm²)

In air In ground

Trefoil (A) Flat (A) Trefoil (A) Flat (A)

Copper Conductors

300400

500630

8001000

645735

850975

1101220

695810

9451090

12601420

495555

615675

750800

570651

745845

9501030


300400

500630

8001000

485560

650745

845970

540635

745870

10151155

400455

510570

630680

445510

590675

770850

49

RATING FACTORS FOR CABLES IN AIRTABLE 7.6 RATING FACTORS FOR AMBIENT AIR TEMPERATURE

Ambient air temperature 20°C 25°C 30°C 35°C 40°C 45°C 50°CRating Factors 1.05 1.00 0.95 0.91 0.86 0.80 0.75

RATING FACTORS CABLES IN GROUNDTable 7.7 RATING FACTORS FOR GROUND TEMPERATURE

Ground Temperature 10°C 15°C 20°C 25°C 30°C 35°C 40°C 45°CRating Factors 1.03 1.00 0.97 0.93 0.89 0.85 0.81 0.77

Table 7.8 RATING FACTORS FOR THERMAL RESISTIVITY OF GROUND

Conductor size (mm²)Thermal Resistivity (°Cm / W)

0.8 0.9 1.0 1.5 2.0 2.5 3.0Single - core cables

Up to 150 1.16 1.11 1.07 0.91 0.81 0.73 0.67From 185 to 400 1.17 1.12 1.07 0.90 0.80 0.72 0.66

From 500 to 1200 1.18 1.13 1.08 0.90 0.79 0.71 0.65

Multicore cablesUp to 16 1.09 1.06 1.04 0.95 0.86 0.79 0.74

From 25 to 150 1.14 1.10 1.07 0.93 0.84 0.76 0.70From 185 to 400 1.16 1.11 1.07 0.92 0.82 0.74 0.68

Table 7.9 RATING FACTORS FOR DEPTH OF LAYING

Depth of laying (m)0.6 / 1 kV cables 1.8 / 3 kV to 18 / 30 kV cables

Up to 50mm2 70 mm to 300mm2 above 300mm2 up to 300mm2 above 300mm2

0.50.60.8

1.01.31.5

1.82.02.5

3.0 or more

1.000.990.97

0.950.940.93

0.920.910.900.89

1.000.980.96

0.940.920.91

0.890.880.870.86

1.000.970.94

0.920.900.89

0.870.860.850.83

--

1.00

0.980.960.95

0.940.920.910.90

--

1.00

0.970.950.94

0.920.900.890.88

50

Table 7.10 GROUP RATING FACTORS FOR CIRCUITS OF THREE SINGLE CORE CABLES, IN TREFOILAND LAID FLAT TOUCHING, HORIZONTAL FORMATION

Cable Voltage (kV)

Number of circuits

Spacing of circuits (between centres of cable groups)

Touching0.15m* 0.3m 0.45m 0.6m

Trefoil Laid Flat

0.6 / 1

23456

0.770.650.590.550.52

0.800.680.630.580.56

0.820.720.670.630.60

0.880.790.750.720.70

0.900.830.810.780.77

0.930.870.850.830.82

1.8 / 3 to 12 / 20

23456

0.870.660.6

0.550.52

0.800.690.630.580.55

0.810.710.650.610.58

0.850.760.720.680.66

0.880.800.760.730.72

0.900.830.800.770.76

18 / 30

23456

0.790.670.620.570.54

0.810.700.650.600.57

0.810.710.650.600.57

0.850.760.720.680.66

0.880.800.760.730.72

0.900.830.800.760.76

* This spacing will not be possible for some of the larger diameter cables

Table 7.11 GROUP RATING FACTORS FOR MULTICORE CABLES IN HORIZONTAL FORMATION

Cable Voltage (kV)

Number of Cables in group

Spacing of circuits (between centres of cable groups)

Touching 0.15m 0.3m 0.45m 0.6m

0.6 / 1

23456

0.810.700.630.580.55

0.870.780.740.700.67

0.910.840.810.780.76

0.930.870.860.830.82

0.940.900.890.870.86

1.8 / 3 to ]12 / 20

23456

0.800.690.630.570.55

0.850.750.700.660.63

0.890.800.770.730.71

0.900.840.800.780.76

0.920.860.840.810.80

18 / 30

23456

0.800.700.640.590.56

0.830.730.680.630.60

0.870.780.740.700.68

0.890.820.780.750.74

0.910.850.820.790.78

51

TABLE 7.12 METRIC CONDUCTOR SIZESAND RESISTANCE (20°C) FOR FIXED WIRING


Maximum d.c. resistance Conductor size (mm2)

Maximum d.c. resistance

Plain copper (ohm / km)

Metal coated copper (ohm

/ km)

Aluminium* (ohm / km)

Plain copper

(ohm / km)

Metal coated copper (ohm

/ km)

Aluminium* (ohm / km)

0.50.75

11.52.5

46101625

35507095120

150185240300400

36.024.518.112.17.4

4.613.081.831.150.727

0.5240.3870.2680.1930.153

0.1240.09910.07540.06010.0470

36.724.818.212.27.56

4.703.111.841.16

0.734

0.5290.3910.2700.1950.154

0.1260.100

0.07620.06070.0475

-----

7.414.613.081.911.20

0.8680.6410.4430.3200.253

0.2060.1640.1250.100

0.0778

500630800

10001200

1400 +1600 +1800 ‡2000 ‡

1150 ‡1130 ‡

380480600740960

1200

0.03660.02830.02210.01760.0151

0.01290.01130.01010.0090

0.01560.0138

------

0.03690.03860.02240.01770.0151

0.01290.01130.01010.0090

--

------

0.06050.04690.03670.02910.0247

0.02120.01860.01650.0149

0.02580.0228

0.08000.06330.05150.04100.03130.0250

* includes metal-coared and metal clad+ non prefered sizes in IEC 228‡ sizes used for O.F. cables (not in IEC 228) solid sectoral conductors (not in IEC 228 but standard for British

practice, BS 6360) Except where stated, the data is in accordance with IEC 228 and British Standards.

52

TABLE 7.13 ELECTRICAL CHARACTERISTICS0.6 / 1Kv ARMOURED XLPE CABLES

Conductor Size (mm2)

Single-core cables* Multicore cables

A.C. resistance at 90°C Reactance (50Hz) A.C. resistance at 90°C Reactance (50Hz) (ohm

/ km)Copper

(ohm / km)Aluminium (ohm / km)

Trefoil (ohm / km )

Flat # (ohm / km )

Copper (ohm / km)

Aluminium (ohm/km)

1625355070

95120150185240

300400500630800

1000

---

0.4940.342

0.2470.1970.1600.1280.0989

0.08020.06400.05150.42000.0363

0.0316

---

0.8220.568

0.4110.3250.2650.2110.162

0.130----

-

---

0.1060.103

0.0980.0960.0970.0960.092

0.0900.0900.0890.0860.086

0.084

---

0.1450.162

0.1570.1550.1560.1550.151

0.1490.1480.1460.1440.144

0.142

1.470.9270.6680.4940.342

0.2470.1970.1600.128

0.0989

0.08020.06400.05150.04200.0363

0.0316

2.451.541.11

0.8220.568

0.4110.3250.2650.2110.162

0.130----

-

0.0800.0790.0770.0760.075

0.0730.0730.0730.0730.073

0.072----

-

53

Table 7.14 ELECTRICAL CHARACTERISTICS 1.8 / 3kV ARMOURED XLPE CABLES


Single-core cables* 3-core cables

A.C. resistance at 90°C Reactance (50Hz)

Capacitance (µF / km )

A.C. resistance at 90°CReactance

(50Hz) (ohm / km)

Capacitance (µF / km )Copper


Trefoil (ohm / km )

Flat # (ohm / km )

Copper (ohm / km)

Aluminium (ohm/km)

1625355070

95120150185240

300400500630

---

0.4940.342

0.2470.1950.1600.1280.098

0.0800.0640.0510.042

---

0.8220.568

0.4110.3250.2650.2110.162

0.130---

---

0.1160.110

0.1040.1040.1000.0980.094

0.0910.0900.0890.086

---

0.1720.165

0.1600.1590.1560.1540.150

0.1470.1470.1450.143

---

0.310.36

0.420.450.490.540.63

0.700.770.800.84

1.470.9270.6680.4940.342

0.2470.1950.1600.1280.098

0.080---

2.421.541.11

0.8220.568

0.4110.3250.2650.2110.162

0.130---

0.1040.0950.0920.0880.084

0.0810.0790.0770.0760.074

0.073---

0.180.220.250.270.31

0.350.380.420.460.51

0.57---

* Aluminium wire armoured # Twice cable diameter spacing between centres

54

Table 7.15 ELECTRICAL CHARACTERISTICS 3.6 / 6kV ARMOURED XLPE CABLES






(50Hz) (ohm / km)



Trefoil (ohm / km )

Flat # (ohm / km )

Copper (ohm / km)

Aluminium (ohm/km)

3.6 / 6 kV

1625355070

95120150185240

300400500630

---

0.4940.342

0.2470.1950.1600.1280.098

0.0800.0640.0510.042

---

0.8220.568

0.4110.3250.2650.2110.162

0.130---

---

0.1160.110

0.1040.1040.1000.0980.094

0.0910.0900.0890.086

---

0.1720.165

0.1600.1590.1560.1540.150

0.1470.1470.1450.143

---

0.310.36

0.420.450.490.540.63

0.700.770.800.84

1.470.9270.6680.4940.342

0.2470.1950.1600.1280.098

0.080---

2.421.541.11

0.8220.568

0.4110.3250.2650.2110.162

0.130---

0.1040.0950.0920.0880.084

0.0810.0790.0770.0760.074

0.073---

0.180.220.250.270.31

0.350.380.420.460.51

0.57---

6 / 10kV

1625355070

95120150185240

300400500630

---

0.4930.342

0.2470.1960.1590.1280.098

0.07900.06320.05100.0416

---

0.8210.569

0.4100.3250.2650.2110.162

0.1300.102

0.08040.0639

---

0.1270.120

0.1140.1090.1060.1030.099

0.0960.0930.0900.087

---

0.1850.177

0.1710.1660.1630.1600.156

0.1530.1500.1470.145

---

0.270.31

0.340.370.400.440.49

0.520.590.660.74

1.470.9270.6680.4930.342

0.2470.1960.1590.128

0.0984

0.07970.0639

--

2.451.541.11

0.8220.568

0.4100.3250.2650.2110.161

0.1300.102

--

0.1340.1240.1160.1110.106

0.1000.0970.0940.0920.089

0.0860.083

--

0.210.240.260.280.32

0.360.390.420.460.51

0.560.62

--

* Copper wire screened, unarmoured # Twice cable diameter spacing between centres

55

Table 7.16 ELECTRICAL CHARACTERISTICS 8.7 / 15kV AND 12 / 20kV ARMOURED XLPE CABLES






(50Hz) (ohm / km)



Trefoil (ohm / km )

Flat # (ohm / km )

Copper (ohm / km)

Aluminium (ohm/km)

8.7 / 15kV

1625355070

95120150185240

300400500630

---

0.4930.343

0.2470.1960.1590.1280.0979

0.07890.06300.05070.0414

---

0.8220.568

0.4100.3250.2640.2110.161

0.1300.1020.802

0.0636

---

1.3200.125

0.1190.1140.1110.1070.103

0.1000.0970.0930.090

---

0.1900.183

0.1760.1710.1680.1640.160

0.1560.1530.1510.147

---

0.220.25

0.270.290.320.340.38

0.420.470.510.57

1.470.9270.6680.4930.343

0.2470.1960.1590.128

0.0982

0.07940.0636

--

2.451.541.11

0.8220.568

0.4100.3250.2640.2110.161

0.1300.102

--

0.1430.1320.1240.1180.112

0.1060.1020.1000.0970.093

0.0900.087

--

0.170.190.210.230.26

0.290.310.340.370.41

0.450.50

--

12 / 20 kV

1625355070

95120150185240

300400500630

---

0.4940.342

0.2470.1960.1590.1280.098

0.0790.0630.0510.041

---

0.8210.569

0.4090.3240.2650.2110.160

0.1290.1010.0800.064

---

0.1380.131

0.1240.1190.1160.1130.108

0.1040.1010.0970.094

---

0.1920.185

0.1780.1730.1700.1650.161

0.1580.1550.1520.149

---

0.190.22

0.240.260.280.300.34

0.370.400.440.49

-0.9270.6680.4930.342

0.2470.1960.1590.1270.098

0.0790.063

--

-1.541.11

0.8220.568

0.4100.3250.2640.2110.161

0.1300.102

--

-0.1390.1300.1240.118

0.1110.1070.1040.1010.097

0.0940.090

--

-0.170.180.200.22

0.240.260.280.310.34

0.370.41

--

* Copper wire screened, unarmoured # Twice cable diameter spacing between centres

56

Table 7.17 ELECTRICAL CHARACTERISTICS 18 / 30kV ARMOURED XLPE CABLES






(50Hz) (ohm / km)



Trefoil (ohm / km )

Flat # (ohm / km )

Copper (ohm / km)

Aluminium (ohm/km)

7095120150185

240300400500630800

0.3420.2470.1960.1600.128

0.09770.07850.06240.05000.04050.0388

0.5680.4110.3240.2640.211

0.16000.12900.10100.07970.06300.0509

0.1430.1340.1290.1250.121

0.1160.1120.1070.1040.0990.095

0.1940.1890.1840.1780.174

0.1690.1660.1620.1580.1550.151

0.160.180.190.210.22

0.2500.2700.2900.3200.3500.400

0.3420.2470.1960.1590.128

0.09780.0788

----

0.5680.4110.3250.2650.211

0.1610.130

----

0.1350.1270.1220.1180.114

0.1090.105

----

0.160.180.190.210.22

0.240.26

----

TABLE 7.18 ELECTRICAL CHARACTERISTICS132kV SINGLE CORE UNARMOURED XLPE CABLES


Single-core cables*

A.C. resistance at 90°C Reactance (50Hz)Capacitance

(µF / km )Copper (ohm / km)

Aluminium (ohm / km)

Trefoil (ohm / km )

Flat # (ohm / km )

300400500630

8001000

0.0780.0600.0490.039

0.032-

0.1290.0990.0780.062

0.0500.041

0.1470.1400.1320.127

0.1210.117

0.1980.1900.1820.173

0.1650.158

0.1300.1400.1600.170

0.1950.210

* Aluminium wire armoured# Twice cable diameter spacing between centres

57

Table 7.19 TEMPERATURE CORRECTION FACTORS FOR CONDUCTOR RESISTANCE

Temperature of conductor (°C) Factor to convert to 20°C Reciprocal to convert from 20°C

56789

1011121314

1516171819

2021222324

2526272829

3035404550

5560657075

808590

1.0641.0591.0551.0501.046

1.0421.0371.0331.0291.025

1.0201.0161.0121.0081.004

1.0000.9960.9920.9880.984

0.9800.9770.9730.9690.965

0.9620.9430.9260.9090.893

0.8770.8620.8470.8330.820

0.8060.7940.781

0.9400.9440.9480.9520.956

0.9600.9640.9680.9720.976

0.9800.9840.9880.9920.996

1.0001.0041.0081.0121.016

1.0201.0241.0281.0321.036

1.0401.0601.0801.1001.120

1.1401.1601.1801.2001.220

1.2401.2601.280

The manufacturer reserves the right to modify or vary the construction or specification of any of the products at their dis-cretion and without notice. The information contained herein is in line with the appropriate standards and sound eletrical practice - it is believed to be reliable but as each application is unique, the manufacturer can accept no responsibility as to the suitability of any product for a particular use, or for any error of omissions, unintentional or otherwise.

58

CALCULATION OF SHORT-CIRCUIT/EARTH FAULT CURRENT CARRYING CAPACITY

Adiabatic method as per IEC 60949, IEC 60986 & IEC 61443 1. Calculation of adiabatic short-circuit current

I = ε x IAD

IAD = K S 1n (θf + βθi + β )

tWhere,IAD = short-circuit current calculated on an adiabatic basis (A)ε = factor to allow for heat loss into the adjacent components. For adiabatic calculations e = 1S = nominal cross-sectional area (mm2)θi = Initial temperature (°C)θf = final temperature (°C)t = duration of short circuit (s)K = constant depending on the material of the current carrying component (As½/mm2), for Cu. 226 for Al. 148 for Steel 78 for Lead 42β = reciprocal of temperature coefficient of resistance of the current carrying component at 0°C (K), for Cu. 234.5 for Al. 228 for Steel 202 for Lead 230

59

Curves are based on: * Cables at maximum operating temperature of 90ºC at start of short-circuit. * Final conductor temperature of 250ºC.

Duration of Short Circuit (second) for Copper Conductor

Max

imum

Per

mis

sibl

e Sh

ort

Cir

cuit

Cur

rent

(kA

)

500

400

300

200

150

100

Conductor Sizes (mm2)

1000

800

630

500

400

300

240

185

150

120

95

70

50

35

25

16

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

2.0

3.0

4.0

5.0

106

809070

60

50

40

30

20

10

97

6

5

4

3

2

1

108

SHORT CIRCUIT CURRENT OF XLPE CABLES (COPPER CONDUCTOR)

60

SHORT CIRCUIT CURRENT OF XLPE CABLES (ALUMINIUM CONDUCTOR)

Duration of Short Circuit (second) for Aluminium Conductor

Max

imum

Per

mis

sibl

e Sh

ort

Cir

cuit

Cur

rent

(kA

)

300

200

150

100

9080

Conductor Sizes (mm2)

1000

800

630

500

400

300

240

185

150

120

95

70

50

35

2516

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

2.0

3.0

4.0

5.0

106

70

60

50

40

30

20

10

89

7

6

5

4

3

2

1

Curves are based on: * Cables at maximum operating temperature of 90ºC at start of short-circuit. * Final conductor temperature of 250ºC.

Leader Cable Industry Berhad (26936-P)

Lot 1385, Tikam Batu Industrial Estate 08600 Sungai Petani, Kedah, MalaysiaTel: 604-438 9988 Fax: 604-438 8497 www.leadercable.com.my

Selangor Sales OfficeUnit 8.2, Level 8, Building A, Peremba Square Saujana Resort, Seksyen U2 40150 Shah Alam, Selangor, Malaysia.Tel: 603-7845 7788/6699 Fax: 603-7845 2258/8323

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