lightning arrester

Lightning arrester is the foundation of insulation coordination of various electrical equipment (transformer, reactor, capacitor,generator, motor, Pt. CT. circuit breaker, contactor, etc.)in the power system. The internal and external insulation indexes (short-ime power frequency withstand voltage, lightning impulse withstand voltage, operating impulse withstand voltage, etc.)of all electrical equipmentin the power system are determined by the protection performance of lightning arrester. Metal oxide arrester.commonly known as “zinc oxide arrester”, Is a new generation of arrester popularized internationally by the United States, Japan and other countries in the 1980s. It is the most advanced product among conventional arresters.

The core working element of the productis made of muti-element metal oxide powder mainly composed of zinc oxide, which has xcellent nonlinear volt ampere characteristics, fast response to waves and large current capacity. The products with gaps adopt self blowing gaps and pressure equalizing iradiation structure, which reduces the dispersion of discharge and reduces the impact numberThe adoption of composite insulation jacket conforms to the development trend of miniaturization, safety and maintenance free of international power products.

Compared with traditional inorganic materials such as ceramics and glass. polymer organic composite materials have the advantages of small volume, light weight, pollution resistance, cleaning free,explosion -proof and vibration proof. It is the preferred lightning protection element in the integrated and modular medium and high voltage transmission equipment.