What is Circuit Breaker making current release?
What is Circuit Breaker making current release?
(OP)
Can some one throw some light on what is " making current release" in context of circuit breakers.
As per standard AS 62271-100-2008 it is defined as
"Release which permits a CB to open, without any intentional time delay,during a closing operation ,if the making current exceeds a predetermined value, and which is rendered inoperative when the CB is in closed position"
As per standard AS 62271-100-2008 it is defined as
"Release which permits a CB to open, without any intentional time delay,during a closing operation ,if the making current exceeds a predetermined value, and which is rendered inoperative when the CB is in closed position"






RE: What is Circuit Breaker making current release?
On a large breaker the instantaneous trip current when closing may be a different setting than the instantaneous trip current when the breaker is closed.
Bill
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"Why not the best?"
Jimmy Carter
RE: What is Circuit Breaker making current release?
RE: What is Circuit Breaker making current release?
RE: What is Circuit Breaker making current release?
RE: What is Circuit Breaker making current release?
RE: What is Circuit Breaker making current release?
"Circuit breakers
14-300 Circuit breakers, general
(1) Circuit breakers shall be of the trip-free type."
This applies to manually operated circuit breakers.
There is often a toggle in the operating mechanism of the breaker. The trips collapse this toggle allowing the breaker to open by spring action, sometimes aided by the magnetic force of the current.
Even if the breaker handle is held in the closed position, when the toggle collapses the breaker opens. Resetting the breaker resets the toggle into the normal operating position.
Sorry.
I didn't realize you were speaking about electrically operated breakers.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: What is Circuit Breaker making current release?
RE: What is Circuit Breaker making current release?
Manual: http://www.eaton.com/ecm/groups/public/@pub/@elect...
See page 17 for details on MCR.
RE: What is Circuit Breaker making current release?