• Introduction to the function, use and principle of the surge arrester tester tester. The leakage current of a zinc oxide surge arrester can be divided into two parts: the capacitive part and the resistive part. Under normal conditions, the resistive current accounts for a relatively small component of the total current, so an increase in the resistive current has little effect on the increase of the total current. Monitoring the total current is not very sensitive to changes in the resistive current. A better way to monitor the nonlinear resistance characteristics of the valve plate is to directly monitor the resistive current. According to the development needs of substations and the development...[Details]




  • Comparison between surge protective devices and surge arresters



    2015-12-14 Comparison between surge protective devices and surge arresters. A surge arrester refers to a building surge arrester, which together with lightning rods and grounding bars forms a Faraday cage to prevent damage to the building. The basic principle of a surge arrester is to divert lightning electromagnetic pulses (LEMP) into the ground for dissipation. But why are there still a large number of buildings and their internal equipment damaged by lightning after installing surge arresters? First, the conductor of the surge arrester is made of copper-iron alloy, so its conductivity is limited, and the response speed is only 2013-09-21  What is a surge arrester? A surge arrester, also known as: surge arrester, can release lightning or also release overvoltage energy from power system operations, protect electrical equipment from transient overvoltage hazards, and can interrupt the follow current to avoid causing ground short circuits in the system. Surge arresters are usually connected between live conductors and the ground, in parallel with the protected equipment. When the overvoltage value reaches the specified