During the installation and operation and maintenance of photovoltaic power stations, cables may be routed in the soil below the ground, overgrown with weeds and rocks, on sharp edges of the roof structure, or exposed to the air. The cables may bear various external forces. If the cable sheath is not strong enough, the cable insulation layer will be damaged, which will affect the service life of the entire cable, or cause short-circuit, fire, and personal injury hazards. Cable scientific research and technical personnel found that the material cross-linked by radiation has higher mechanical strength than before radiation treatment. The cross-linking process changes the chemical structure of the polymer of the cable insulation sheath material, the fusible thermoplastic material is converted to non-fusible elastomeric material, and the cross-linking radiation significantly improves the thermal, mechanical and chemical properties of the cable insulation material. characteristic.

      The DC loop is often affected by a variety of unfavorable factors during operation, resulting in grounding, making the system unable to operate normally. Such as extrusion, poor cable manufacturing, unqualified insulation materials, low insulation performance, aging of the DC system insulation, or certain damage defects can cause grounding or become a grounding hazard. In addition, the intrusion or bite of small animals in the outdoor environment can also cause DC ground faults. Therefore, in this case, armored cables with anti-rodent agent sheaths are generally used.