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Basic Working Principle of the Earthing Switch
2025-10-11 15:42:18

The basic working principle of an earthing switch is to safely connect or disconnect electrical equipment from the ground by controlling the grounding point within the circuit. Its structure typically consists of contacts, a driving mechanism, and an energy storage device.

During operation, the energy storage device first stores energy in a spring, and the driving mechanism then rapidly opens or closes the contacts, thereby achieving quick grounding or disconnection. The primary function of the earthing switch is to quickly discharge fault current during equipment maintenance or in case of a malfunction, ensuring the safety of electrical equipment.

In addition, earthing switches may experience issues such as asynchronous opening and closing or energy storage failure, which can affect their performance. Therefore, regular inspection and maintenance are essential to ensure proper operation. Particular attention should also be paid to problems like contact welding, which must be handled effectively to prevent equipment damage.

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