Liebert® BDC™
7.0LIEBERT® BDC™
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™ frame 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
UPS AC input and AC output cables are
Distribution Cabinet are bolted together
Bypass Distribution Cabinet | Isolation |
| |
MBB | Transformer |
* AC Input | SKRU |
3W + G |
|
| UPS Cabinet |
| CB3 |
BIB | CB2 |
| Static Bypass |
Remove Jumper |
|
|
for Dual Input |
|
|
Configuration | CB5 | MIB |
CB1 | ||
Rectifier | Inverter |
|
| Converter |
|
2 Wire + Ground
225A | 42 Poles |
225A | 42 Poles |
225A | 42 Poles |
225A | 42 Poles |
Local Grounding Electrode
200kVA Only
Battery Cabinet
* External Overcurrent
Protection By Others
MBD
FPC12004 Rev. 3
7.1Normal (UPS) Mode
While the Liebert BDC is in Normal mode (MBB open; BIB/MIB closed), the UPS is supplying the connected load with continuous,
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