The item is in accordance with standards of IEC., applying to the circuit of AC50/60Hz,
240V single phase, 415V three phases and below it for industrial and mining enterprise,
trade building, commerce and family. To mainly prevent electric fire and personal
casual-ty accident caused by personal electric shock or leakage of electrified wire netting,
this ELCB is a current-operated, fast leakage protector of pure electromagnetic type,
wh-ich can break off fault circuit rapidly in order to avoid occurrence of accident.
The item is precise in structure, less elements, without auxiliary power and high
working reliability. The function of the switch won`t be influenced by ambient temperature
and lightning. The mutual inductor of the item is used to test vector differential
value of passing current, and produces a relevant output power and add it to the tripper
insecondary winding, if the current of vector differential value of protected circuit
of personal electric shock is up to or over leakage operating current, the tripper will
act and cut off so that the item will take effect of protection.

It has passed France NF certificate ...