difference between RCCB and ELCB

RCCB (residual current circuit breaker)

IMPORTANT POINT

• phase (line) and neutral both wire connected through RCD
• it trips the circuit when there is earth fault current
• The amount of current flows through the phase shoild return through return
• it detects by RCD any mismatch between two currents flowing through phase and neutral detect by RCD and trip the circuit within 30 millisecond 
• RCDs are an extremely effective form of shock of protection
• RCCB is not having sensing or connectivity off earth

the most widely used are 30 milliamp and 100 milliamp devices. 

A current flow of 30 milliamp is sufficiently small that it makes it very difficult to receive a dangerous shock.

even 100 milli amp is a relatively small figure when compared to the current that may flow in an earth fault without such protection ( hundred of amps)

A 300/500 mA RCCB may be used where only fire protection is required. eg. on lighting circuits,where the risk of electric shock is small.

ELCB (Earth leakage circuit breaker)

what is earth leakage

leakage is the flow of current from live conductor to the earth electrical system must include such device to detect leakage current even it is the small magnitude then power disconnect from the load circuit.

how to check earth leakage breaker

1.first turn off the power

2.press in the earth leakage breaker test button

3. check the earth leakage breaker move to off position

4.return earth leakage breaker turn to on position

5.turn on the main power

earth leakage  circuit breaker are voltage detecting device.

the main purpose of ELCB is to protect humans and animals from electrical shock,

a voltage sensing ELCB does not detect fault current from human or animal to the earth

 

                                                                     

                                                                          ELCB connection