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Analyze the causes and consequences of solar cable heating
When the solar cable passes through a certain load current during operation, a certain amount of heat will be generated. As the cable load current increases, the surface temperature of cable will gradually become higher.If not dealt with in time, the consequences can be imagined. Such as the pvc cables, The core temperature is 70° as the upper limit, the surface temperature will be 5-10°cooler. Therefore, the surface temperature of solar cable below 60°is basically safe. From the perspective of power supply maintenance, the lower the temperature, the better.
The reason of heating for solar cable during the operation are as follow:
1. The conductor resistance of the cable does not meet the requirements, causing the cable to heat up during operation.
2. Improper selection of cable type causes the conductor cross section of the cable to be too small, resulting in overload during operation. After a long time of use, the heat and heat dissipation of the cable will be unbalanced and cause heating.
3. If cables are too densely installed, the ventilation and heat dissipation effect is poor, or the distance between cables and other heat sources is too close, the heat dissipation of cables is affected. It may also cause cable heating during operation.
4. The joint manufacturing process is not good and the crimping is not strict, resulting in excessive contact resistance at the joint and cable heating.
5. Cable insulation performance is poor, resulting in low insulation resistance, heating during operation.
After cable heating, if the cause is not found, timely troubleshooting, insulation thermal breakdown will occur after the cable continues to energize, which may lead to cable short circuit trip, which may cause fire as can be seen from the above reasons, cable heating is directly related to the quality of cable.Guangdong Cable Factory develops and produces better quality cables for everyone.Everyone should choose to purchase high-quality cables with quality assurance.
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