Purpose: It is used for overhead power lines with AC rated voltage of 10kV and below.
Use requirements: 1. Long term allowable working temperature of cable conductor: ① Cross linked polyethylene insulated cable shall not exceed 90 ℃. ② High density polyethylene insulated cable shall not exceed 75 ℃. 2. Cable laying temperature shall not be lower than - 20 ℃. 3. Maximum temperature of cable during short circuit (the longest duration shall not exceed 5s): ① Cross linked polyethylene insulation shall not exceed 250 ℃. ② High density polyethylene insulation shall not exceed 150 ℃.