Question { ABB, 54946 }

What is the difference between MPCB and OLR?

Answer

hi. the olr and mpcb both are the protecting devices. but
the olr senses the current of winding capacity. means the
maximum current which does not cause the winding
insulation.it always connected in the starter.

but the mpcb sense the over current by means of load. the
phase to phase short, and the dead short are sensed by the mpcb.