Vertiv™ |
Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual
|
47
NOTICE
Risk of power loss to connected load. Can cause damage to equipment.
The load equipment is not protected from supply aberrations, such as spikes, sags and failures, when the Liebert
®
EXM is
operating in Load on Bypass Mode.
Figure 27
One-line diagram, single-input UPS with 3-breaker maintenance bypass cabinet and panelboard
Notes
1. Install in accordance with national and
local electrical codes.
2. Input and bypass must share the same
single source.
3. Vertiv recommends a grounding conductor.
4. Bypass and rectifier input and output cables
must be run in separate conduits
5. Control wiring must be run in separate conduits.
MAINTENANCE BYPASS CABINET
* Bypass
AC Input
3 Wire + GND
Output
Busbar
AC Output 480V
3 Wire + GND
BIB - Bypass Isolation Breaker
MBB - Maintenance Bypass Breaker
MIB - Maintenance Isolation Breaker
* External Overcurrent Protection By Others
Field-Supplied Wiring
BATTERY
EXM11011
Rev. 1
UPS CABINET
Static Bypass
BIB
MBB
MIB
Summary of Contents for Liebert EXM
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