3 Phase Mcb Circuit Diagram. As i shown in the above diagram. Three pole breaker electric cable in the below image i shown 3 pole circuit breaker wiring with 3 phase supply however you can use in for 2 phase and neutral.
The wiring of both is same. When a surge exists anywhere in the system across one or more of the conductors the breaker trips the power bridge collapses and the circuit opens. The main function of an mcb is to switch the circuit i e to open the circuit which has been connected to it automatically when the current passing through it mcb exceeds the value for which it is set.
Mcb is a mechanical switching device which can carry and break currents under normal circuit conditions and also under specified abnormal conditions such as overload and short circuit.
Seems like a bit of a faff and a pricey option 3x dp mcbs 3x rcds 3x sp mcbs per circuit. I have 3x three phase circuits 13a 40a 48a that i wish to protect independently with rcds. Used most often in a three phase electrical system a three pole breaker connects three different conductors such as is often required by heavy duty industrial motors. Have seen diagrams like below where the incoming l1 l2 l3 get split to separate dp mcbs rcds and sp mcbs for each phase.
