EARTH LEAKAGE CIRCUIT BREAKER

ELCB – EARTH LEAKAGE CIRCUIT BREAKER

If any leakage current passes through earth, the circuit breaker trips, normal operating conditions current will be ZERO in the core balance CT. If any leakage occurs in the load side, there will be a unbalanced current between phase and neutral, that current will operate the trip. The CB test button is connected between after the CT and neutral before CT. when test button is pressed current flows from phase to neutral through the resistor that current only flows through phase inside the CT. so, this unbalance current fall in the CT will trip the CB immediately.

ELCB                                     30mA                    -  used for domestic purpose

                                                30mA                    -  used for power equipments

                                                1 A                        -        used for industries