RCBO stands for ‘Residual Current Breaker with Over-Current‘. As the name suggests it protects against two types of fault and in essence combines the functionality of an MCB and RCD.
The primary functions of RCBOs are to ensure protection against earth fault currents, overload, and short circuit currents. It is recommended that an RCBO be attached to each separate circuit, meaning that a fault in one circuit will not affect the functioning of the others.
