Schneider Electric Vigi NG125 RCD, 63A, 3P+N Pole, 300mA, Type A

Differential units for NG 125 series circuit breakers.
These blocks are mounted to the right of the circuit breaker.
Fault displayed on front panel by mechanical indicator light.
Adjustable sensitivity of the differential units to 4 values: 300, 500, 1000 and 300 mA.