... ,20,25,32A 4. SAA certificate Single Pole Circuit Breaker RCBO 4.5kA:Scope of application SDRNL-32 ... are mainly applied to the AC 50Hz/60Hz circuit rated 240V and 32A or below, They ... have the electric leakage (electric shock), overload, short circuit and so on protection functions. The over voltage protection ... be pressed once in a state of making the circuit to check whether the function of RCBO is ...