Insulated Overhead Cable China Cable Manufacturer - Jiapu Cable

Insulated Overhead Cable China Cable Manufacturer

Date2019-01-28

Service characteristics and operating conditions of insulated overhead cables:


1. Service characteristics and operating conditions of insulated overhead cables

2. The crosslinking polyethylene insulation overhead cable core maximum working temperature of 90 ℃ for a long time, high density polyethylene insulation 75 ℃, polyvinyl chloride (PVC) is 70 ℃

3. When the environment temperature is not lower than laying - 20 ℃

4. The bending radius is allowed when laying. When the rated voltage is less than 1kv, it is not less than 6 times the outer diameter of the cable, and the rated voltage is less than 10kv, not less than 15 times the outer diameter of the cable

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Above 10kv insulated overhead cables can be used for systems with single-phase grounding fault time generally no more than 1min at a time, or for systems with a maximum of 8h at a time and a cumulative time of no more than 125h at a time.

When a short circuit (the longest duration of no more than 5 s) the highest temperature of the cable, cross-linked polyethylene insulation 250 ℃ high density polyethylene edge 150 ℃

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10 kv overhead insulated cable insulation resistance shall be not less than 1500 m Ω • km, thin insulation results of cable insulation resistance shall be not less than 1000 m Ω • km, the user can be used according to the requirement for tension size to choose.