This is a Vigi add-on module for ComPact NSX 100/160 that provides an earth-leakage protection.It is used for 4 poles circuit breakers.The operational rated voltage is between 200 and 440 VAC 50/60 Hz.The earth-leakage sensitivity is adjustable from 30 mA to 30 A.It is installed directly on the device terminals and directly actuates the trip unit in case of earth-leakage default.This Vigi add-on module is self-powered internally by the distribution-system voltage, even is supplied by only 2 phases.It is compliant with IEC 60947-2 standard, annex B.