This is an additional ammeter module of 250A rating for 3 poles Compact NSX 250 devices.This module measures and displays (dial-type ammeter) the current of each phase.The selection of the phase is made by a 3-position switch in front of the device.The module is installed directly on the downstream circuit breaker terminals.The ammeter module has a class 4.5 accuracy.There is a class II insulation level between the front face and the power circuits. This protection degree is IP40.