A Residual Current Circuit Breaker (RCCB) is an important safety measure when it comes to protection of electrical circuits. It is a current sensing device, which can automatically measure and disconnect the circuit whenever a fault occurs in the connected circuit or the current exceeds the rated sensitivity . Specification: Model NO: YCB6HLE-63 Connection: From Top Poles: 1p+N 2 3 3p+N 4 Trademark: CNC Production Capacity: 80000 Set/Sets Per Week Rated Voltage Ue (V): 230/400 Electrical Life (T): 2000 Rated Current in (a): 6, 10, 16, 20, 25, 32, 40, 50, 63 Package includes: 1 x CNC Residual Current Circuit Breakers YCB6HLE-63