Operation
107
Liebert
®
APM
™
Figure 82 Liebert APM six-breaker buyout paralleling configuration
UAM01060A
Rev. 0
Buyout Liebert APM Paralleling Switchboard
* System
AC Input
4 Wire +GND
UIB
See
Note 7
UIB
Liebert APM #1
UPS Cabinet
Liebert APM #2
UPS Cabinet
Battery
Output
Busbar
Output
Busbar
Static Bypass
MIB
MBB
MOB1
MOB2
Opt. K
AC Output
4-Wire+GND
NOTES:
1. Install in accordance with national and local
electrical codes.
2. Input and bypass must share the same single source.
3. A neutral is required from the system AC input source.
A full capacity neutral conductor is recommended.
Grounding conductors are recommended.
4. Bypass and rectifier inputs and output cables must be
run in separate conduits.
5. Control wiring must be run in separate conduits.
Field-Supplied Wiring
LEGEND
UIB - UPS Input Breaker
MOB - Module Output Breaker
MIB - Maintenance Isolation Breaker
MBB - Maintenance Bypass Breaker
* External overcurrent protection by others
6. The 90kVA frame has a capacity of up to six
Flex Power assemblies and the 45kVA frame has a
capacity of up to three Flex Power assemblies.
7. Paralleling switchboard requires shunt trip UIB breakers
with 120V coils.
8. See drawings UAM01080B, UAM01080C, UAM01080D,
UAM01080E and UAM01080F. Refer to the following
battery cabinet control wiring drawings:
UAM04000
UAM4001A,B
UAM4002A,B D)