You should be aware that RCDs will not react to overloads or short circuits. ... These devices are also designed for protection against overloading and short-circuiting. The RCBO will break the circuit if the current demand exceeds a particular level.

Does an RCD provide overload protection?

A pure RCD will detect imbalance in the currents of the supply and return conductors of a circuit. But it cannot protect against overload or short circuit like a fuse or a miniature circuit breaker (MCB) does (except for the special case of a short circuit from live to ground, not live to neutral).

Will an RCD trip on overload?

RCD tripping will occur when a short circuit is identified. Overloads happen when electrical circuits are overwhelmed. This can happen if you plug too many appliances into one power point/adaptor or if appliance voltages and power board capacities have been mismatched.