It is a MH Vigi add-on module for 3 poles Compact NSX 250 and EasyPact CVS 250. It provides an earth-leakage protection when installed directly on the device terminals. It directly actuates the trip unit in case of insulation fault. The addition of this Vigi add-on module does not modify Compact NSX 250 or EasyPact CVS 250 characteristics. It is a MH type module in 3 poles version, self-powered by the input voltage. The operational voltage for the Vigi add-on is from 440VAC to 550VAC 50/60Hz. The sensitivity is adjustable from 30mA to 10A, the time delay is also adjustable. The dimensions of the circuit breaker equipped with this module are 105mm x 236mm x 86mm.