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Insight - How MCB works

Written By: 

Arpit Jain
 
The dismantled mechanical parts used to pull the knob when the tripping takes place. When the MCB gets tripped the moveable contact which is connected to the knob using these mechanical parts pulls the knob to the off position.
 
mechanical parts in MCB
 
The following image shows the arrangement of the plunger, coil and the spring.
 

 

Comments

how the rated current is fixed for every MCB and how it detects the current rating

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

does the frequency matters for a MCB? 

 

VERY NICE

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