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Selection and application
3-14 MCCBs for UPS applications
3-14 MCCBs for UPS applications
Select an MCCB with 1.2 times the UPS (uninterrupted power
supply) output, and use an MCCB with the same capacity at
the input side. Consider the following points when selecting an
MCCB.
UPS overload withstand:
125% for 10 minutes
150% for 1 minute
With overcurrent (including short-circuit current) at the load
side exceeding 160% of the operating current, the UPS will
switch to a backup circuit without tripping the MCCB.
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