63 reactions | Hello Engineers, In this video you'll know about why we used shunt release coil and auxiliary block in molded case circuit breaker (MCCB) #electrical #electrician #electric CNC Electric | Learn EEE | Facebook

Manually switch the switch to the closed position to make the circuit breaker work. Overload protection:If the circuit is overloaded for a long time, the bi-metallic strip becomes overheated and deformed. This deformation of Bi-metallic strip causes, displacement of latch point. The moving contact of the MCB is arranged by means of spring pressure, with this latch point, that a little displacement of latch causes, release of spring and makes the moving contact to move for opening the MCB. | Lear