• Introduction to the function, use, and principle of the surge arrester tester trial 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 component in the total current is relatively small, so an increase in resistive current has little effect on the increase of total current, making total current monitoring not very sensitive to changes in resistive current. To monitor the nonlinear resistance characteristics of the valve plate, a better method is to directly monitor the resistive current. According to the development needs of substations and...[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 discharge lightning electromagnetic pulses (LEMP) into the ground for dissipation. However, why do a large number of buildings and their internal equipment still get damaged by lightning after installing surge arresters? Firstly, 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 a surge arrester, can release lightning or also release energy from overvoltages in power system operations, protecting electrical equipment from transient overvoltage hazards, and can interrupt the follow current to prevent system ground short circuits. Surge arresters are usually connected between live conductors and the ground, in parallel with the protected equipment. When the overvoltage value reaches the specified