Stock Code:300252.SZ

Reasons for heat generation of power cables during operation

author:kingsignal time:2017/08/18

Power cable through a certain load current, will be hot, with the load current increases, the cable surface temperature is higher, if not timely treatment, the consequences can be imagined. Such as: PVC (PVC) cable, is the core temperature of 70 degrees for the upper limit to consider, the surface temperature will be 5 to 10 degrees lower. So the cable surface temperature below 60 degrees is basically safe, from the power maintenance considerations, of course, the lower the temperature the better.


Power cable in the operation of fever reasons are as follows:


1. Cable conductor resistance does not meet the requirements, resulting in the cable in the operation of the heat generated.


2. Cable selection type improper, resulting in the use of the cable conductor cross-section is too small, the operation of the overload phenomenon, prolonged use, the cable heat and cooling imbalance caused by fever.


3. Cable installation is too dense, poor ventilation and heat dissipation, or cable close to other heat sources too close, affecting the normal cooling of the cable, may also cause the cable in the operation of the heat generated.


4. Joint manufacturing technology is not good, crimping is not close, resulting in connector contact resistance is too large, will cause the cable to produce heat.


5. Insulation performance of the cable is not good, resulting in a smaller insulation resistance, the operation will also produce heat phenomenon.


6. armored cable local sheath damage, after the water on the insulation performance caused by slow damage, resulting in gradually reduce the insulation resistance, will also cause the cable to produce heat in the phenomenon.


Power cable generated after the heat phenomenon, if not find the reasons for troubleshooting in a timely manner, the cable will continue to run after the continuous operation of the thermal breakdown of the phenomenon. Causing the cable to occur in phase short circuit trip phenomenon, serious may cause a fire.


The above is a brief description of the causes of the heat generated during the operation of the power cable. To learn more about the power cable, please pay attention to kingsignal's official website

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