Residual Current Circuit Breakers (RCCBs) are safety devices designed to protect against electrical shock and fire hazards by detecting imbalances in electrical current between live and neutral conductors. If an imbalance, typically caused by a leakage current due to insulation failure or ground faults, is detected, the RCCB quickly disconnects the circuit to prevent injury or damage. This rapid response helps ensure user safety and enhances protection in residential, commercial, and industrial electrical systems.