What is the ELCB (Earth Leakage Circuit Breaker)

What is the

ELCB (Earth Leakage Circuit Breaker)

CHARACTERISTICS

·         Phase (line), Neutral and Earth wire connected through ELCB.

·         ELCB is working based on Earth leakage current.

·         Operating Time of ELCB: 

·         The safest limit of Current which Human Body can withstand is 30ma sec.

·         Suppose Human Body Resistance is 500Ω and Voltage to ground is 230 Volt.

·         The Body current will be 500/230=460mA.

Hence ELCB must be operated in  30maSec/460mA = 0.65msec