Xtreme Power Conversion Corporation
M90 User’s Manual
Page 25
Uninterruptible Power Supply
Battery Mode
The UPS automatically transfers to Battery mode if the utility power fails. There is no interruption in power to the
critical load upon failure. In battery mode, the rectifier derives power from the battery and supplies DC power to
the inverter. The inverter filters the DC power and converts it into pure and stable AC power to the load.
Battery Mode Diagram
Bypass Mode
Upon connecting to utility input power, the UPS is in Bypass mode before UPS is turned on (if BYPASS enable set
-
ting is Enabled), and charger function will be active when battery is present. After UPS has been turned on, if the
UPS encounters abnormal situations (over-temperature, overload …, etc.), the static transfer switch will perform as
a transference of the load from the inverter to the bypass source with no interruption. If the transference is caused
by a recoverable reason, the UPS will turn back to line mode when abnormal situation is solved.
Bypass Mode Diagram
Summary of Contents for M90LU
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