Mechanism of Master-pact ACB!!? 1

[albarkani]

Dear all,
here we have another questions about the master pact breaker.
I have 2 question

1- is about the spring charging motor

the spring charging motor use to open the breaker while re-charging the mechanism from discharge position to charge position?

I am planning to change the trip unit (micro logic 2.0a) but i thought it could be better to have some comments from you.

2- is about the quality of master pact breakers in general?

Regards.

 

[albarkani]

dear dampac and dandel,

what you said is correct without the bracket the breaker will trip free, but instead of that simply remove the under-voltage relay so that you can test the breaker.

any how, assuming the bracket is installed and the breaker closed, but when re-charge the spring it will trip! what is the case??

 

[DanDel]

You have a problem that needs an experienced field person to examine.
As I said before, the C/B is designed to be both in the charged state and be closed at the same time. This is a normal condition.
The condition you describe, a closed C/B which opens upon charging, is not normal.