Causes of heating of power cable during operation

After the power cable is heated, if the cause is not found and the fault is eliminated in time, the insulation thermal breakdown will occur after the cable continues to be powered on continuously. This may cause inter phase short circuit tripping of cables, which may cause fire in serious cases. Qingzhou cable manufacturer will explain the causes of power cable heating as follows:

1. When the cables are installed, the arrangement is too dense, the ventilation and heat dissipation effect is not good, or the cables are too close to other heat sources, which affects the normal heat dissipation of the cables, and may also cause the cables to generate heat during operation.

2. Improper cable selection results in too small conductor section of the cable used, resulting in overload during operation. After long-term use, the heating and heat dissipation of the cable are unbalanced, resulting in heating.

3. The resistance of the cable conductor does not meet the requirements, causing the cable to generate heat during operation.

4. Poor joint manufacturing technology and loose crimping will lead to excessive contact resistance at the joint and cable heating.

5. Poor interphase insulation performance of cables results in low insulation resistance and heating during operation. opgw cable

6. The local sheath of armored cable is damaged, which will slowly damage the insulation performance after water inflow, resulting in the gradual reduction of insulation resistance and the heating phenomenon during cable operation.