Questions You Should Know about Zinc oxide arrester

Older surge arresters generally consist of silicon carbide resistor blocks in series with air gaps. These arresters normally carry no current and have a single voltage rating. Aside from a few exceptions, the selection of these arresters is fairly simple:

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Metal oxide surge arresters contain blocks of variable resistance material, usually zinc oxide, with no air gaps. Line-to-ground voltage is applied continuously between the line and ground terminals of the arrester. These arresters do carry a minimal leakage current that can be withstood on a continuing basis.

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The zinc oxide lightning arrester is assembled inside the zinc oxide valve, and the zinc oxide valve plate has good nonlinear voltammetry. Under normal working voltage, it is in an insulation state and has a high resistance value under lightning overvoltage. Then, a low resistance state occurs, and lightning discharge suppresses the residual voltage of the electrical equipment in parallel with the lightning arrester below the safe insulation value of the equipment. After the harmful overvoltage disappears, the valve quickly restores high resistance and is in an insulated state, thereby protecting the insulation of electrical equipment and avoiding voltage damage. The ruthenium in the zinc oxide hair follicle composite insulation layer has good electrical insulation performance, high dielectric strength
Zinc oxide lightning arrester is a type of lightning arrester with good protection. Using the excellent nonlinear voltammetry method of zinc oxide, the current flowing through the lightning arrester at normal operating voltage (microampere or milliampere); When overvoltage is activated, the resistance drops sharply and the energy of the overvoltage is released. Achieve protective effects. The difference between this type of lightning arrester and traditional lightning arresters is that it does not discharge gaps and utilizes the nonlinear characteristics of zinc oxide for discharge and circuit breaking.
1. An instrument used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, limit current duration, and frequently limit current distribution values. Lightning arresters are sometimes referred to as overvoltage protectors or overvoltage limiters.
2. The lightning arrester is connected between the cable and the ground, usually in parallel with the protected equipment. Lightning arresters can effectively protect communication equipment. Once abnormal voltage occurs, the lightning arrester will act to protect the equipment. When communication cables or equipment are operating at normal operating voltage and the lightning arrester does not work, it is considered as a grounding circuit breaker. When a danger occurs to the insulation of the protected equipment, the lightning arrester immediately acts to impact the high voltage to the ground, limit the voltage amplitude, and protect the insulation of communication cables and equipment. After the overvoltage disappears, the lightning arrester quickly returns to its original state, allowing the communication line to work normally.

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