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Surge arrester

Lightning arrester: An electrical appliance used to protect electrical equipment from high transient over-voltage hazards during lightning strikes, and to limit the freewheeling time and the amplitude of freewheeling. Lightning arresters are sometimes called overvoltage protectors and overvoltage limiters.
The busbar arrester and voltage transformer are installed together to protect the equipment on the busbar from overvoltage damage.
At the same time, the leakage current can reflect the insulation of the arrester, which is an important means to judge the quality of the arrester under the operating voltage.

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