Question

What is RCCB and RCB?

Answer 1

An RCCB (Residual Current Circuit Breaker) and RCB (Residual Current Breaker) are electrical safety devices designed to protect people from electrical shocks and prevent electrical fires caused by leakage currents.

RCCB (Residual Current Circuit Breaker)

1. An RCCB is a device that detects leakage current and automatically disconnects the power supply if the leakage exceeds a certain level (usually 30 mA or 100 mA).
   

1. It is mainly used to protect humans from electrical shocks due to earth leakage.
   

1. It works by comparing the current flowing through the live and neutral conductors. If the current is balanced, everything is fine. But if there's any difference (because of a leakage to the ground), the RCCB trips and cuts off the power.
   

1. RCCBs do not protect against overloads or short circuits. They only detect earth leakage.
   

RCB (Residual Current Breaker)

1. An RCB is essentially the same as an RCCB. Sometimes, the terms are used interchangeably.
   

1. It is also designed to trip when there’s a difference in current between live and neutral wires, indicating a leakage to the ground.
   

In short:

1. RCCB is a type of RCB.
   

1. They are both safety devices that protect from electrical shocks due to leakage currents.
   

  
These devices are commonly used in households and industries for electrical safety.