
Electrical Connections—UPS
Liebert
®
e
XM
™
18
Figure 7
Single UPS block diagram—Dual input, single source configuration
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.
6. Optional 54-pole 400A distribution panel or two 225A subfeed breakers.
7. Customer must supply shunt trip breaker with 120V coil. If an optional
Liebert BDC is not present, the shunt trip must be installed to Bypass Breaker.
BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection
by others
Field-Supplied Wiring
Bypass Distribution Cabinet
* Bypass
AC Input
4-Wire + GND
AC Output
208V
4-Wire + GND
* Rectifier
AC Input
4-Wire + GND
BIB
MBB
MIB
Static Bypass
UPS Cabinet
Battery
Optional
Distribution
See Note 6
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