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Folding arrester

Folding arrester
The role of the arrester is to protect various electrical equipment in the power system from being damaged by lightning overvoltage, operating overvoltage, and power frequency transient overvoltage. The main types of arresters are protective gap, valve arrester and zinc oxide arrester. The protection gap is mainly used to limit the atmospheric overvoltage, and is generally used for the protection of the incoming line section of the power distribution system, lines and substations. Valve type arrester and zinc oxide arrester are used for the protection of substations and power plants. In systems of 500KV and below, they are mainly used to limit atmospheric overvoltage. In ultra-high voltage systems, they will also be used to limit internal overvoltage or for internal overvoltage. Backup protection

The arrester is connected in parallel to the protected equipment or facility. Normally, the device is insulated from the ground. When a lightning overvoltage occurs, the device and the ground are turned from insulation to conduction, and breakdown discharge occurs, and the lightning current or overvoltage is introduced into the ground. Protective effects. After the overvoltage is terminated, the arrester quickly returns to the blocked state and resumes normal operation. Lightning arresters are mainly used to protect electrical equipment

And power lines, also used as a safety measure to prevent high voltage from entering the room. The arresters have protective gaps, tubular arresters, valve arresters and zinc oxide arresters.