Recidual current circuit breakers designed to interrupt the circuit when there is a direct or indirect contact or an earth leakage betweek live conductors and eart greater than 30 or 300mA. RCCBs must be protected by an MCB of fuse that protects against overloads and shrot circuits.
Protection against sinusoidal leakage current. Applied in domestic and commercial installations
Protection against sinusoildal and rectified leakage currents with ir without a DC component. Applied in commercial an industrial installations. Type A- (S) has a time delayed trip to provide selectivity with downstream earth leakage devices. Applied in commercial and industrial installations.