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What is the difference between standard and Mission Critical (W) Micrologic trip units? Are the adjustable dials identical?

FA247065

23 January 2021

Issue:
Mission Critical breakers

Product Line:
Circuit Breakers

Resolution:
The trip curves and adjustments for the standard and W trip units are the same.  The difference is that the W trip units have been modified to delay longer before tripping (though still within the curve) in order to provide more withstand capability and coordinate with downstream breakers at higher fault levels.  

More information on the trip units can be found in the instruction bulletin 48940-310-01.