Daily inspection and troubleshooting of solar cables are an important part of the later maintenance of photovoltaic cables. The DC withstand voltage and leakage should be inspected every year. If the solar cable is out of power for more than one month, the insulation resistance should be measured, and the cable bushing should be clean and not leaking, the insulating glue has no gaps and cracks, and the cable sheath has no rust, small holes, and unevenness. There is no water and debris in the cable trench, and the joint and the outer skin are grounded and fastened.
1. Bus cable inspection items in operation
1.1 The temperature of the joint should not exceed 70°C
1.2 No serious vibration and sound of the busbar
1.3 No loud discharge sound and sparks
1.4 There should be no discharge phenomenon at the cable head tube sleeve
1.5 If it is found that the temperature display on the busbar or its joints has melted, measures should be taken quickly to reduce the load. If the busbar is found to be hot and red, the operation mode should be immediately changed to stop the operation of the busbar.
2. Solar cable faults and solutions
2.1 The cable sheath is broken or the temperature exceeds the allowable value.
2.2 The cable joint is heated and the cable insulation is broken down.
2.3 If a fire or explosion accident is found during the operation of the cable, the power supply shall be cut off immediately, and the accident shall be dealt with according to the relevant accident handling regulations, and then the cable shall be isolated from power outage and extinguished according to relevant regulations.
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