Powerware Plus 80 Operation page 14

Your UPS functions automaticatly
load. The UPS ahvays operates in one of three modes:
In Norma/ mode, the critical load is supplied by the inverter, which
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derives its power from rectified utility AC power. In this mode, the
rectifier also provides charging current for the battery.
maintains inverter
In &pass mode, the critical load is directly supported by the utility
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through an isolation transfomw.
The UPS continually monitors itself and the incoming utility power, and automatically
between these modes as required,
sophisticated detection and switching logic inside the UPS ensures that operating mode
changes are automatic and transparent to the critical load. The UPS
modes in response to these sysfem even&
A command is an intervention that is externally initiated by an operator
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or by some site action. A command causes the UPS to switch
operating modes: it usually does not require any further actton by you.
A nofice is a minor system event that may or may not &ire your
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attention.
An a/arm is a system event that requires immediate operator
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intervention.
System events, alarm horns, and indicator lights are described in 'Responding to System
Events' on page 45.
Plus 80 UPS Operators Manual
to supply AC electrical power to your crittcal
operation. The battery the critical load.
The
operating
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