The ABB range of AP-R anti-disturbance residual current circuit-breakers and blocks was designed to overcome
the problem of unwanted tripping due to overvoltage of atmospheric or operation origin.
The electronic circuit in these devices can distinguish between temporary leakage caused by disturbances on the
mains and permanent leakage due to actual faults, only breaking the circuit in the latter case.
Ultimate protection of people and equipment
The Residual Current Circuit breaker RCCBs are the safest device to detect and trip against electrical leakage currents, thus ensuring protection against electric shock caused by indirect contacts. These devices must be used in series with an MCB or fuse which protects them from the potentially damaging thermal and dynamic stresses of any over currents. They also act as the main disconnecting switches upstream of any derived MCBs (e.g. domestic consumer unit).
Main benefits
Main Features
