RCCB stands for Residual Current Circuit Breaker. It is an electrical safety device that quickly breaks an electrical circuit with leakage current to ground. It is to protect equipment and to reduce the risk of serious harm from an ongoing electric shock. RCCB works based on the principle of Kirchhoff’s current law, which states that the incoming current must be equal to the outgoing current in a circuit. RCCB thus differentiates the deviation in current values between live and neutral wires.
Type AC RCCB:
Type AC RCCB is a residual current device that can detect and trip on sinusoidal alternating currents. It is suitable for general applications where there are no DC components in the leakage current.
Type A RCCB:
Type A RCCB is a residual current device that can detect and trip on sinusoidal alternating currents as well as pulsed DC residual currents. It is suitable for applications where there are electronics, rectifiers, and instruments that may produce DC leakage currents.
Type B RCCB:
Type B RCCB is a residual current device that can detect and trip on sinusoidal alternating currents, pulsed DC residual currents, as well as smooth DC residual currents. It is suitable for applications where there are inverters, UPS, photovoltaic systems, lifts, escalators, welding equipment, industrial machines, and electric vehicle charging equipment that may produce smooth DC leakage currents.
