Emerson Liebert APS, User Manual

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Product Introduction
13 Liebert
®
APS
™
1.5.4 Power Module
The power module is shown in Figure 9 .
Figure 9 Liebert APS power module
Each power module is an independent 5kVA unit, consisting of a power factor corrected rectifier,
battery charger and inverter, with associated monitoring and control circuitry. The modules are
connected in parallel for greater capacity and/or redundancy.
The power modules may be added or replaced on-line with no interruption or danger to the connected
equipment or user.
1.5.5 Battery Module
The battery module is shown in Figure 10 .
Figure 10 Battery module appearance
When AC utility fails, the battery module will supply power to the load. Each battery module contains
six individual 12V, valve-regulated lead-acid (VRLA) battery blocks. Two battery modules are
connected in series to form a battery string.
Each battery module has monitoring and controls to isolate the battery module in the event of a
battery failure. The battery strings are connected in parallel to provide backup time and/or
redundancy.
The battery modules may be added or replaced on-line with no interruption or danger to the
connected equipment, provided that the UPS is not operating on battery.
Under normal operation, the green status LED will blink continuously and the yellow fault LED will
be Off. For any other condition, refer to 5.0 - Troubleshooting .
NOTE
Two battery modules must be installed in the same layer to make a complete battery string.
Yellow Fault LED
Fastener
Locking Lever
FRONT VIEW
Fan
Green Status LED
Green Status LED
Yellow Fault LED
Fastener
Locking Lever
FRONT VIEW
Locking
Lever