Define transfer time and back up time of UPS.

Define transfer time and back up time of UPS.
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Transfer time of UPS: The transfer time, sometimes also called switchover time, is the amount of time the UPS will take to switch from utility to battery supply during a mains failure, or from battery to mains when normal utility power is restored.

Back up time of UPS: The backup time is the amount of time for which the UPS will supply the power to load during mains failure.
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