The full form of RCCB is “Residual Current Circuit Breaker.”
An RCCB (Residual Current Circuit Breaker) is a device that is used to protect electrical circuits and equipment from damage caused by earth leakage current. It is also known as an ELCB (Earth Leakage Circuit Breaker) or a ground fault circuit interrupter (GFCI).
The RCCB works by monitoring the current flowing in the live conductor and the current flowing in the neutral conductor of an electrical circuit. If there is a difference between the two currents, known as a residual current, the RCCB will trip and disconnect the circuit. This occurs when there is a current leakage to earth, which can happen due to a fault in the electrical equipment or a fault in the electrical installation.
RCCBs are typically used in residential and commercial buildings, as well as in industrial environments, to provide protection against electrocution and fire hazards. They are particularly useful in areas where there is a high risk of electric shock, such as bathrooms, kitchens, and swimming pools.
The RCCB has two main parts, the residual current device (RCD) and the circuit breaker (CB). The RCD monitors the current flowing in the live and neutral conductors and compares it. If there is an imbalance, it sends a signal to the CB which will disconnect the circuit.
RCCBs are classified into different types based on the type of current they can detect and the level of sensitivity. The most common types are AC type RCCB, which are sensitive to alternating current, and DC type RCCB, which are sensitive to direct current.
It’s important to note that RCCBs must be tested regularly to ensure they are functioning correctly. A test button is provided on the device which allows the user to test the RCCB easily.
Overall, the RCCB (Residual Current Circuit Breaker) is a device that protects electrical circuits and equipment from damage caused by earth leakage current. It works by monitoring the current flowing in the live and neutral conductors of an electrical circuit, and if there is a difference between the two currents, it will trip and disconnect the circuit. RCCBs are typically used in residential and commercial buildings, as well as in industrial environments, to provide protection against electrocution and fire hazards. They need to be tested regularly to ensure they are functioning correctly.