There are two types of earthing switches: maintenance earthing switch and fast earthing switch.
The maintenance grounding switch is arranged next to the isolating switches on both sides of the circuit breaker, and only serves the function of grounding on both sides of the circuit breaker during maintenance.
indoor 12KV HV earthing switch for switchgear 12 KV HV earthing grounding switch
The fast grounding switch is arranged on the side of the line side of the outgoing line isolation switch of the outgoing circuit, and it has two functions:
1 Open and close parallel overhead lines due to capacitive current generated by electrostatic induction and inductive current generated by electromagnetic induction;
2 When the insulator inside the shell has a creepage phenomenon or the inside of the shell is ignited, the fast grounding switch drops the main circuit and quickly grounds, and the circuit breaker is used to cut the fault current.
Generally, the fast grounding switch is used on the 110KV GIS high voltage.
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