Large scale ground power stations in our country are generally located in the western regions, which are usually deserts, saline alkali land, and have large temperature differences during the day. Rat infestations are also quite severe, and the environment can be very humid. The buried laying of cables requires high requirements for filling and excavating cable trenches; The operating environment of distributed power plant cables is not better than that of the ground mentioned above. The cables can withstand high temperatures, which are measured and controlled by technical personnel. The roof temperature can even reach high temperatures of 100-110 ℃. The fire and flame retardant requirements of the cables, as well as the high temperature, have a significant impact on the insulation breakdown voltage of the cables. Therefore, the editor of graphite grounding reminds everyone to consider the following points when selecting and designing:

1. Insulation performance of cables

2. Moisture resistance, cold resistance, and weather resistance of cables

3. Thermal and flame retardant properties of cables

4. Cable laying method

5. Conductor materials of cables (copper core, aluminum alloy core, aluminum core)

6. Sectional specifications of cables

There are three main reasons for cable grounding faults.

Firstly, cable manufacturing defects are considered unqualified products;

Secondly, the operating environment is harsh, naturally aging, and subjected to external damage;

Thirdly, the editor of graphite grounding reminds everyone that the installation is not standardized and the wiring is rough. The root cause of grounding faults is only one - the insulation material of the cable.