Xtreme Power Conversion M90S Series User & Installation Manual page 25

M90S-4S User's Manual Uninterruptible Power Supply
critical load upon failure. In battery mode, the inverter filters the DC power from battery and converts it into pure
and stable AC power to the load.
Battery Mode Diagram
3.3.5 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
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