Vertiv Liebert EXM, User Manual

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Vertiv™ | Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual | 19
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