Introduction

mode under impulse current., its operating function is, related to the line voltage, taking main power

source as auxiliary power supply, it is mainly composed of electronic package board, electronic control leakage release, test device, and zero-sequence current transformer that is made of high magnetic

conductive material.(residual current circuit breaker with overload protection function also has thermal

overload release), all the parts are installed in a molded case.

●      When the protected circuit comes across current leakage or electric shock, once the leakage current

reaches the set operating value, the secondary winding of zero-sequence current transformer will output

a signal that triggers thyristor, which makes the residual current circuit breaker operate through leakage

release, and cut off the power supply, finally realize protection function against current leakage or

electric shock. Working principle.

●      When the protected circuit comes across overload, the residual current circuit breaker with overload

protection is able to break the circuit, protecting the electrical equipment from being damaged.