Emerson Liebert eXM - UPS Input Configuration with Transformers; Figure 8 Liebert Exm in a Split Bypass Configuration

Electrical Connections—UPS
19 Liebert
®
eXM
™
3.2.4 UPS Input Configuration with Transformers
Figure 8 shows the Liebert eXM in a split bypass (single-source, dual-input) configuration using two
transformers inside a dual-transformer cabinet.
In this configuration, the static bypass and the rectifier lines can be supplied by independent sources.
The Liebert eXM Dual Transformer Cabinet is the only approved method for supplying the eXM from
two independent sources. See SL-25655 for details. Both feeds must be protected externally with
properly sized protective devices.
Figure 8 Liebert eXM in a split bypass configuration
The bypass distribution cabinet is available with a 480V, 600V or 208V optional internal transformer.
Dual Transformer
Cabinet, Optional
Bypass Distribution Cabinet
UPS Cabinet
MBB
MIB
BIB
Battery
* Bypass
AC Input
3-Wire + GND
* Rectifier
AC Input
3-Wire + GND
AC Output
208V
4-Wire + GND
Optional
Distribution
Static Bypass