The EKF PROxima ARD-63 residual current circuit breaker (RCCB/RCBO) is a device that combines the functions of a circuit breaker with an electromechanical or electronic RCCB. If the circuit breaker detects a leakage current (fault) to ground or an overcurrent (overload or short circuit) in the protected part of the network, the device trips, resulting in the disconnection of the protected network. Suitable for switching aluminum and copper conductors. The compact EKF PROxima ARD-63M residual current circuit breaker combines the functions of a circuit breaker with an AC-type electronic RCCB in a compact one-module wide housing. If the circuit breaker detects a leakage current (fault) to ground or an overcurrent (overload or short circuit) in the protected part of the network, the device trips, resulting in the disconnection of the protected network. A special feature of EKF residual current circuit breakers with electronic RCCBs is the presence of an overvoltage protection unit. Suitable for switching aluminum and copper wire.