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0.6kv and below overhead insulated cable working temperature

2021-12-20 09:26
The service temperature of overhead insulated cables of 0.6kv and below shall not exceed how many degrees

Use characteristics of overhead insulated cables of 0.6kv and below

0.6kv.jpg

Rated voltage Uo/Uo is 0.6/KV

The long-term allowable humidity of the cable conductor does not exceed:

PE, PVC insulated aerial cables: 70℃;

PE insulated overhead cable: 90℃.

When short-circuit (the longest duration does not exceed 5 seconds), the maximum temperature of the cable conductor should not exceed: XLPE insulated overhead cable: 160℃;

PE insulated overhead cable: 130°C; XLPE insulated overhead cable: 250°C. The ambient temperature during cable laying should not be lower than -20°C. Cable allowable bending radius:

When the cable outer diameter (D) is less than 25mm, it should not be less than 4 times the cable outer diameter;

When the cable outer diameter (D) is equal to or greater than 25mm, it should not be less than 6 times.

When the cable is used in an AC system, the rated voltage of the cable should be at least equal to the rated voltage of the system; when the cable uses a grounded DC system, the rated voltage of the system should not be greater than 1.5 times the rated voltage of the cable.


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