Residual Current Circuit Breakers (RCCBs)
The residual current circuit breaker or RCCB is basically a gadget that senses current and breaks any low voltage (uneven current) circuit in the event of a fault. It can measure the current and disconnect it from the circuit in the event of a fault or if the current exceeds its sensitivity so that no electrical short can occur. In residual current circuit breakers, you can determine whether they are on or off. Green means off, and red means on. Residual current circuit breakers are very important components for circuit protection.