Normal Mode
In Normal mode, utility AC power is supplied to the rectiier. The rectiier supplies DC
power to the inverter, which then supplies the critical load with AC power. The rectiier also
provides charging power to the
UPS and reported by a status indicator on me Monitor Panel. The message "UPS
Supplying Load' appears in the status area of me
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Figure 3 shows the path of electricai power through the UPS system when the UPS is
operating in Normal mode.
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If me utilll AC power is interrupted or is out of speciricatfon.
switches to Battery mode to support me crittcal load with no intarruption.
power returns. the UPS returns to Normaf mode.
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If the UPS system becomes overfoaded.
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operation is restored to fall wfthin spacifted
If me UPS suffers an internal failure, it switches automaticaffy
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in mat mode until the failure is correcM and the UPS is put back into service.
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returns to Normal mode when the error condition is deared
me UPS switches to Bypass mode. The UPS
limits.
to &pass mode and remains
When utilii
and system
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