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The maximum allowable temperature of power cable

Information Source:Henan Huadong Cable Co., Ltd Release date:2014-02-21

In the selection of power cable, must ensure that the cable loss in different parts of heat generated by the cable temperature not exceed its maximum allowable temperature. The maximum allowable temperature of the cable, mainly depends on the thermal aging properties of insulating material. Cable temperature is too high, will accelerate the aging of the insulation material, shorten the service life of the cable. The following are the Huadong cable limited company of types of power cable the maximum permissible temperature.

Type

Voltage(kV)

The maximum allowable temperature (℃)

Rated load

Open circuit

Impregnated paper insulated power cables

1~3

80

250

6

65

10

60

35

50

175

Don't drop paper insulated power cables

1~6

80

250

10

65

35

65

175

XLPE insulated power cable

≤10

90

250

>10

80

PVC insulated power cable

 

70

160

Oil - filled power cable

63~500

75

1

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