Lbdc; Iebert Bdc; Normal (Ups) Mode; Figure 20 Single Input Ups With External Liebert Bdc With Optional Internal Transformer-Typical - Liebert NX User Manual

7.0 L BDC
IEBERT
The Liebert BDC is designed to operate in UPS mode, bypass mode and maintenance mode. The
Liebert BDC offers either 45kVA or 90kVA capacity to match the associated Liebert NX
offerings. Each of the Liebert BDC capacities offer optional 480V and 600V internal transformers as
well as multiple output distribution selections.
Figure 20 Single input UPS with external Liebert BDC with optional internal transformer—typical

configuration

Bypass Distribution Cabinet
* AC Input
3W + G
UPS Cabinet
BIB
Remove Jumper
for Dual Input
Configuration
7.1

Normal (UPS) Mode

While the Liebert BDC is in Normal mode (MBB open; BIB/MIB closed), the UPS is supplying the
connected load with continuous, high-quality AC power. In this mode of operation, the load is
protected by the UPS.
® ™
Liebert NX
™
MBB
SKRU
CB2
Static Bypass
CB1
Inverter
Rectifier
Converter
2 Wire + Ground
Battery Cabinet
MBD
UPS AC input and AC output cables are factory-supplied when UPS and Bypass
Distribution Cabinet are bolted together
Isolation
Transformer
CB3
CB5 MIB
Field-Supplied Wiring
* External Overcurrent
Protection By Others
41
Liebert BDC
™ frame
225A 42 Poles
225A 42 Poles
225A 42 Poles
200kVA
Only
225A 42 Poles
Local Grounding
Electrode
FPC12004
Rev. 3
™