Fire retardant requirements of the cable, and high-temperature cable insulation breakdown voltage greatly. Therefore, the selection design should consider the following points:
1. Insulation performance of cable 2. Moisture-proof, cold-proof and weather resistance of cable 3. Heat-resistant and flame retardant performance of cable 4. Laying of cable 5. Conductor material of cable (copper core, aluminum alloy core, aluminum core)
6, the cross-section specifications of the cable
There are three main reasons for cable ground faults:
First, cable manufacturing defects are non-qualified products;
Second, the operating environment is harsh, natural aging, and external damage;
Third, the installation is not standardized and the wiring is rough. The root cause of a ground fault is only one - the insulation of the cable.
China's large-scale terrestrial power stations are generally located in the western part of the country. These places are generally deserts, saline-alkali lands, and large temperature differences between days. Rats are also seriously damaged and the environment is very humid. Cable buried and laid, cable trench fill and dig requirements are relatively high; distributed power station cable operating environment is not better than the above ground, the cable will withstand high temperatures, technical personnel monitoring, roof temperature can reach 100-110 °C The high temperature.
1. Insulation performance of cable 2. Moisture-proof, cold-proof and weather resistance of cable 3. Heat-resistant and flame retardant performance of cable 4. Laying of cable 5. Conductor material of cable (copper core, aluminum alloy core, aluminum core)
6, the cross-section specifications of the cable
There are three main reasons for cable ground faults:
First, cable manufacturing defects are non-qualified products;
Second, the operating environment is harsh, natural aging, and external damage;
Third, the installation is not standardized and the wiring is rough. The root cause of a ground fault is only one - the insulation of the cable.
China's large-scale terrestrial power stations are generally located in the western part of the country. These places are generally deserts, saline-alkali lands, and large temperature differences between days. Rats are also seriously damaged and the environment is very humid. Cable buried and laid, cable trench fill and dig requirements are relatively high; distributed power station cable operating environment is not better than the above ground, the cable will withstand high temperatures, technical personnel monitoring, roof temperature can reach 100-110 °C The high temperature.
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