While upto 10 mA may just evoke a prickling sensation, 10 mA onwards may lead to muscular contraction, further leading to a respiratory paralysis at around 30mA. Offers protection against voltage fluctuation as it includes a filtering device that guards against transient voltage levels.Ī human being is able to sustain an electric shock to the extent of 30 mA.Offers possibility of dual termination both for cable and busbar connections.Automatically disconnects the circuit when the rated sensitivity is exceeded.

Provides protection against earth fault as well as any leakage current.As it creates an imbalance on the neutral coil of the device, the RCCB trips and supply is disconnected thereby checking RCCB’s reliability. When the test button is pushed, the current starts to flow through the test circuit. On spotting a Residual Current, the RCCB is triggered to trip off the circuit.Ī test circuit included with the Residual Current device ensures that the reliability of RCCB is tested. In case of a fault, the current from the neutral wire is reduced, the differential between the two known as Residual Current. Ideally, the current flowing to the circuit from the live wire should be the same as that flowing through the neutral wire. RCCB thus compares the difference in current values between live and neutral wires. RCCB works on the principle of Kirchhoff’s law, which states that the incoming current must be equal to the outgoing current in a circuit.

The presence of RCCB ensures that in such cases, the circuit will trip immediately and the person is thus protected from an electric shock. It is a current sensing device, which can automatically measure and disconnect the circuit whenever a fault occurs in the connected circuit or the current exceeds the rated sensitivity.Īimed at protecting an individual from the risk of electric shocks as well as electrocution and fires, RCCB is particularly helpful in instances of sudden earth fault.

Electrocution and fire being the two major risks associated with electricity, one cannot afford to be negligent when it comes to insulating equipment.Ī Residual Current Circuit Breaker (RCCB) is an important safety measure when it comes to protection of electrical circuits. While electricity has become an indispensable component of our lives, the fact is, it comes with its own hazards to human life and property.

Principle instaling