Specifying Molded Case Breaker
Specifying Molded Case Breaker
(OP)
Hi,
I have done it quite a few times but now I have an application where I have to go into a bit of detail for specifying a circuit breaker.
I know that if I have to operate a molded case breaker or for that matter any type of circuit breaker remotely or external means, I need a shunt trip coil.
|---||-----(TC)--|
The above normally open contact is a push button located remotely that will open the breaker.
What would make me ask for a auxillary contact.
In the situation below and above what is the difference:
| 52A
|---||---||--(TC)--|
|
I would appreciate, if you could advise, what am I missing conceptually here.
Thanks
I have done it quite a few times but now I have an application where I have to go into a bit of detail for specifying a circuit breaker.
I know that if I have to operate a molded case breaker or for that matter any type of circuit breaker remotely or external means, I need a shunt trip coil.
|---||-----(TC)--|
The above normally open contact is a push button located remotely that will open the breaker.
What would make me ask for a auxillary contact.
In the situation below and above what is the difference:
| 52A
|---||---||--(TC)--|
|
I would appreciate, if you could advise, what am I missing conceptually here.
Thanks






RE: Specifying Molded Case Breaker
htt
Here a shunt trip is represented as
a
|--||--(ST)---|
Should I presume that when a shunt trip is used, A contact with designation "a" similar to circuit breaker auxillary contacts comes with it. As far my understanding goes, this contact opens as breaker opens and removes power to shunt trip coil, which removes coil to tripping coil(Shunt trip coil) of molded case breaker.
Please correct me, I think the same concept works with Med. voltage breakers as well.
This thing is confusing me.
I would appreciate a help.
RE: Specifying Molded Case Breaker
RE: Specifying Molded Case Breaker
RE: Specifying Molded Case Breaker