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What does "Maximum Clearing Time" mean in the trip curve of a circuit breaker?

Define "Maximum Clearing Time" in the trip curve  

Product Line:
Molded Case & Miniature Circuit Breakers

Time Current Curve

"Maximum clearing time" is the total time from the initiation of the over current to the breaker being fully open and the current at zero.  It includes breaker sensing and reaction time and arcing time.

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