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What is the function of the red button on a QBL, QDL, QGL, or QJL circuit breaker?

Issue:
What is the use of the red button on a QBL, QDL, QGL,  or QJL circuit breaker?
 
Product Line:
Circuit Breaker

Environment:
Powerpact Q-Frame
 
Resolution:
The red button is an integral push-to-trip button use to manually trip the circuit breaker. This should be used as part of a regular preventive maintenance program.
 
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