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1.0
I
NTRODUCTION
The Liebert APM UPS is a transformer-free, hardware-scalable, online uninterruptible power system
with 208/120V input and 208/120V output capability. The Liebert APM can operate with either a 50
or 60Hz input and provide a matching output frequency conversion. The rack-mounted 15kVA/kW
modules allow scaling the UPS's capacity in 15kVA increments from 15kVA to a maximum of 90kVA
in a single frame.
Optional transformers are available to add 208V Isolation or 480V or 600V input capability to the
Liebert APM in both the UPS, 90kVA/kW frame only, or the Bypass Distribution Cabinet (BDC) in
either the 45kVA/kW or the 90kVA/kW frame.
The Liebert APM UPS is a SmartAisle
approach.
The Liebert APM provides continuous, high-quality AC power to business-critical equipment, such as
telecommunications and data processing equipment. The Liebert APM supplies power free of the
disturbances and variations in voltage and frequency common to utility power, which is subject to
brownouts, blackouts, surges and sags.
The Liebert APM utilizes the latest in high-frequency, double-conversion pulse width modulation
(PWM) technology and fully digital controls to enhance its reliability and increase the ease of use.
Two frame sizes are available: 45kVA/kW and 90kVA/kW. The 45kVA/kW frame is designed to accept
internal batteries; the 90kVA/kW frame does not. The 90kVA frame is, however, designed to accept
Internal Transformers and a four-breaker bypass.
Output Voltage Adjustment
This feature allows a Liebert Customer Engineer to adjust the output voltage over a range of -5% to
+16% of nominal. This permits compensation for any IR drop when the UPS is a significant distance
from the protected load. Output voltage adjustment can optimize the UPS output voltage for loads
that operate more efficiently at a UPS output voltage different from the Liebert APM's standard
output voltage.
1.1
Battery Maintenance
WARNING
!
Risk of electrical shock and high short circuit current. Can cause equipment damage, personal
injury and death.
These maintenance procedures will expose hazardous live parts. Refer servicing to properly
trained and qualified personnel working in accordance with applicable regulations as well as
with manufacturers' specifications.
1.1.1
Battery Safety Precautions
Servicing of batteries should be performed or supervised by personnel knowledgeable of batteries and
the required precautions. Keep unauthorized personnel away from batteries.
When replacing batteries, use the same number and type of batteries.
WARNING
!
Risk of electric shock, explosive reaction, hazardous chemicals and fire. Can cause equipment
damage, personal injury and death.
Lead-acid batteries contain hazardous materials. Batteries must be handled, transported and
recycled or discarded in accordance with federal, state and local regulations. Because lead is a
toxic substance, lead-acid batteries must be recycled rather than discarded.
Do not dispose of battery or batteries in a fire. The battery may explode.
Do not open or mutilate the battery or batteries. Released electrolyte is harmful to the skin
and eyes. It is toxic.
™
technology, appropriate for use with the SmartAisle design
5
Introduction
®
™
Liebert
APM
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