Shaanxi cable factory overhead cables Price overhead cables

Overhead cable insulation and protective earth and protect access to zero in order to protect the personal safety for the purpose of the electrical equipment uncharged metal ground or zero, called the protective earth and protect access to zero. Protective grounding the neutral point ungrounded three-phase power system, when an electrical device is connected to this system because insulation damaged leaving live shell, if the person standing on the ground shell touched by hand, since the transmission line and the ground of Inter have distributed capacitance exists, there will be current through the body and back to the power distribution capacity, makes electric shock, as shown in Figure 6-7-13. In general, this current is small. However, if the grid is widely distributed, grid or overhead cable insulation dielectric strength decreased significantly, the current may reach the degree of risk, which must take security measures. Overhead insulated cables connecting the zero line should be solid and reliable, good contact. Cable connections with the device bolted neutral crimp. All electrical equipment connected to the zero line, shall be connected to the zero line parallel allowed the series. Prohibit the installation of the zero line fuse or circuit breaker separate switches. Corrosive substances in the environment, in order to prevent corrosion of the zero line, shall, at its surface is coated with the necessary anti-corrosion coatings. , Were legal and overhead cable insulation must be robust and reliable ground effect!