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Insight - How MCB works

Written By: 

Arpit Jain
The image shows how the spring loaded mechanism works. The spring which is connected to the rod of the plunger pushes the plunger back to its rest position once the tripping has taken place.

Spring Mechanism

The image below shows the structure and arrangement of plunger, the moveable contact and the spring.

Plunger Structure in MCB



So Simply explained..was feeling the urge to know about the MCB mechanism .

does the frequency matters for a MCB? 



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i have MCB switch but i doesn't work

please tell that is it manadatory to connect Input supply to input terminal or we can connect it to output terminal also.