NFB2L-4P (CF364) Earth Leakage Circuit Breaker are applying to the circuit of 50/60Hz 230VAC single phase.
400VAC three phases & prevent electric fire and personal casualty accident caused by personal electric shock or leakage of electric wire netting, it is a current-operated, fast leakage protector of pure electroma-gnetic type, which can break off fault circuit rapidly in order to avoid occurrence of accident. The function of the switch won't be influenced by ambient temperature & lightning. The mutual inductor of the item is used
to test vector differential value of passing current & produces a relevant output power and add it to the tripp-
er in secondary winding, if the current of vector differential value of protecting the circuit of personal electric shock is up to or over leakage operating current, the tripper will act & cut off so that the item will take effect
of protection.
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