36/66(72.5)kV CU/XLPE /LEAD/PE (or PVC,LSHF) 240 ~ 2000 MM2

The basic material for XLPE is polyethylene, which is chemically transformed to cross-linked polyethylene (XLPE) through the cross-link reaction of organic peroxides. The cross-link method for polyethylene was developed in the United States during the 1950’s and has since been continuously developed for application to higher voltages. Higher voltages are increasingly being required, and the 500kV XLPE cables have already been commercialized.

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Design & Construction

1.Conductor

2.Conductor screen

3.XLPE insulation

4.Insulation screen

5.Semiconducting tape

6.Lead sheath

7.PE or PVC outer sheath (Graphite coating or extruded semiconducting)

Application

Used for underground power transmission lines; laid on cable ladder, tray, buried direct in the ground or in duct in the ground

CURRENT RATING, SINGLE CIRCUIT

Nominal area		[mm²]	240	300	400	500	630	800	1000	1200	1600	2000
Direct buried in ground		[A]	527	597	681	776	884	994	1153	1242	1417	1556
Buried in duct		[A]	480	543	619	709	812	913	1063	1144	1310	1443
In free air	Trefoil formation	[A]	599	685	792	912	1051	1191	1420	1538	1771	1953
In free air	Flat formation	[A]	677	778	903	1046	1218	1396	1658	1806	2116	2379

TECHNICAL DATA

Nominal cross- sectional area	Shape of conductor	Nominal Diameter of conductor	Nominal Thickness of conductor screen	Nominal Thickness of Insulation	Nominal Thickness of Insulation screen	Nominal Thickness of lead sheath	Nominal Thickness of Outer sheath	Approx. Overall diameter of cable	Approx. Weight of cable	Maximum DC resistance at 20 C	Capacitance
mm²		mm	mm	mm	mm	mm	mm	mm	kg/m	Ω/km	µF/km
240	CC	18.1	1.0	11.0	1.0	1.6	3.5	61	7.3	0.0754	0.20
300	CC	20.4	1.0	11.0	1.0	1.6	3.5	64	8.1	0.0601	0.22
400	CC	23.2	1.0	11.0	1.0	1.6	3.5	66	9.1	0.0470	0.23
500	CC	26.3	1.0	11.0	1.0	1.6	4.0	71	10.6	0.0366	0.25
630	CC	30.2	1.0	11.0	1.0	1.6	4.0	74	12.3	0.0283	0.28
800	CC	34.0	1.0	11.0	1.0	1.7	4.0	78	14.6	0.0221	0.30
1000	4S	38.7	1.0	11.0	1.0	1.7	4.0	83	17.2	0.0176	0.33
1200	4S	41.8	1.0	11.0	1.0	1.8	4.5	87	19.4	0.0151	0.35
1600	4S	48.3	1.0	11.0	1.0	1.8	4.5	94	23.8	0.0113	0.39
2000	5S	54.3	1.0	11.0	1.0	1.9	4.5	100	28.5	0.0090	0.43