ELECTROMAGNETIC AC TYPE RCCB

An electromagnetic AC type RCCB (Residual Current Circuit Breaker) refers to a specific type of circuit breaker used in electrical systems to protect against electric shocks and electrical faults. Here is a description of the features and functioning of an electromagnetic AC type RCCB rated at 40A:

1. Residual Current Sensing: The RCCB is designed to monitor the flow of electrical current in a circuit. It specifically detects any imbalance between the current flowing into a circuit and the current returning from it. This imbalance is known as a residual current, which may occur due to electrical leakage or faults.
2. Trip Sensitivity: The RCCB is set to trip and interrupt the circuit if it detects a residual current above a certain threshold. The sensitivity of the RCCB is typically measured in milliamperes (mA) and is adjustable in some models. For example, a common sensitivity setting is 30mA, meaning that if the RCCB detects a residual current of 30mA or higher, it will trip and cut off the power supply.