Powerware
®
Plus 12 Operator's Manual (164200090 Rev E) 1
1 Introduction
The Powerware Plus 12 UPS is a highĆperformance, online, microprocessorĆcontrolled
UPS designed to protect your equipment from corruption or loss of information
because of electricalĆline disturbances. During a power failure, the UPS supplies
backup power from maintenanceĆfree batteries, providing additional time to complete
computer activity and safely store data. When commercial power is present, the UPS
supplies filtered and regulated power to your equipment and maintains the battery in a
charged condition. The advanced switching technology used in this UPS enables the
unit to handle a wide range of input voltages and frequencies.
Special Features
All Plus 12 UPS models come with the following special features:
True online, doubleĆpower conversion operation for complete load protection
Reliable, highĆquality power whether operating from utility, battery, or generator
Local/Remote Emergency PowerĆOff (EPO/REPO) feature that can disconnect
your protected equipment from all power sources
Automatic and maintenance bypass
Easy access to input, output, and battery circuit breakers
Latching lid protects circuit breakers
Sturdy, lineĆup and match cabinets are attractive enough for any office or
computer room
Sealed, maintenanceĆfree batteries
Casters for easy installation and mobility
Digital front panel allows userĆprogrammable output voltage and frequency
Rectifier, inverter, and I/O modules are housed in factoryĆsealed field replaceable
units for safety, easy repair, and quick upgrades
20% additional output kVA for nonlinear load applications
OneĆyear Powercare
®
limited warranty and extended warranty service (USA
and Canada)
System Overview
During normal operation, incoming commercial power is filtered to reduce noise and
spikes. The rectifier provides isolated, regulated, and filtered DC power to the inverter.
A portion of the input power to the rectifier is used to charge the battery. The inverter
provides further regulated and filtered AC power to the load. In the event of a severe
overload or unit failure, the Auto Bypass feature (if enabled) switches the load to the
filtered input power. If bypass is not available, the inverter can still support difficult loads
for a short period of time.
If utility power falls out of tolerance, the UPS remains online, deriving power from the
battery. During extended power outages, the battery supplies power until nearly
discharged at which time the UPS shuts off power to the load. When the utility power
returns within tolerance, the UPS automatically restarts and supplies power to your
protected equipment while recharging the battery.
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