Author: Noyafa–Cable Locator Suppliers
There are three main reasons for grounding faults of grounding resistance cables and grounding resistance cables. First, the cable is manufactured with defects and is a non-qualified product; second, the operating environment is harsh, natural aging, and external force damage; third, installation Irregular, rough wiring. The root cause of ground faults is only one - the insulation of the cable. Large-scale ground power stations in my country are generally located in the west. These places are generally deserts, saline-alkali land, and large temperature differences during the day. The rat damage is also serious, and the environment will be very humid.
Cables are laid in the ground, and the filling and excavation requirements of cable trenches are relatively high; the operating environment of distributed power station cables is not better than that on the ground above, and cables will withstand high temperatures, which are measured and controlled by technicians, and the roof temperature can even reach 100-110 ℃ The high temperature, the flame retardant requirements of the cable, and the high temperature have a great influence on the insulation breakdown voltage of the cable. Therefore, the following points should be considered in the selection design: 1. Insulation performance of the cable 2. Moisture-proof, cold-proof and weather resistance of the cable 3. Heat-resistance and flame-retardant performance of the cable 4. The laying method of the cable 5. The conductor material of the cable (copper Core, aluminum alloy core, aluminum core) 6. Cable cross-section specifications Cable grounding troubleshooting and precautions grounding resistance Shenzhen Noyafa Electronic Technology Co., Ltd.
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