This is an additional Imax ammeter module of 400A rating for 3 poles Compact NSX 400 devices.This module measures and displays (dial-type ammeter) the maximum current flowing in the middle phase.The Imax value can be reset on the device front face.The module is installed directly on the downstream circuit breaker terminals.The Imax ammeter module has an accuracy of /- 6%.There is a class II insulation level between the front face and the power circuits. This protection degree is IP40.