What is RCBO ( Residual current circuit breaker with over current protection ) ?

Currently MCB and RCCB is available in combination, function of MCB and RCCB both are in one package. this device is called RCBO ( Residual current circuit breaker with over current protection ).

This is a protective device which combines two functions. It acts as a residual current device and a circuit breaker.

RCBOs are commonly used in applications where there is the need to combine protection against over currents (overload and short-circuit) and protection against earth leakage currents.

This combination not only allows reduction in costs, but also ensures

• over current

• short circuit

• earth leakage

• earth fault.

👉Connection of RCBO :

Connection of RCBO

RCBO package have 2 wire with it, one is black and other one is white .

Black one is connected with incoming neutral and white is connected with Earth wire.

👉RCBO application :

Application of (RCCB + MCB) combination circuit breakers

1 All type of residential premises can have incoming protection after energy meter instead of MCB and RCCB.

2 Domestic appliances like water heaters, washing machines, electric iron, pump sets etc.,

3 All electrical equipment such as lifts, hosts, vibrators, polishing machines etc.

4 In all industrial distribution and equipment

5 In agriculture pump sets.

6 Operation theatres and electrically operated medical equipment such as X-ray machines.

7 All neon sign installations 8 All low and medium voltage electrical distributions.

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