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Liebert
®
BDC
™
45
Figure 22 Liebert BDC connection to Liebert
®
NX
™
NOTE
Install jumper on TB1 pins 4 and 5. For startup procedure, see 11.2 - UPS Startup.
Fuse 1
1/2 Amp
600 Volt
Isolation
Transformer
Fuse 6
1/2 Amp
600 Volt
3 Amp Inline Fuse
Provided With
T2 Transformer
Red
Black
Transformer
600V White
480V Orange
400V Blue
240V Red
208V Yellow
Common Black
See Note 1
& Table
W574
W563
W571
Black
W564
24 VAC
W570
W571
W565
X0
H1
H2
H3
X1
X2
X3
K1
3
B
A
6
9
7
4
1
8
5
2
1
2
3
4
5
6
7
8
To UPS Monitor Board
Terminal Block J21
Inverter Bus Output Switch
inhibited When
Circuit Is Closed
To Parallel Board X3-1-EXT-MAINT
To Parallel Board X3-2-GND2
J21-INV_S
J21-INV_C
TB2
TB2-1
TB2-2
TB2-3
TB2-4
W565
Black
W572
W573
1
3
4
5
6
2
Push Button Switch
Solenoid Key Release Unit
(Auxiliary switch shown in
position with key installed.)
Interlock key normally retained
In lock. Key removable when
Solenoid is energized.
OK to Transfer
Indicator
Solenoid Key Release Unit
W566
W567
W567
W569
W564
W573
W572
W568
W570
W569
Table 1
Isolation Transformer
Output Voltage
208/120
220/127
T2 Transformer
Tap Location
208V (Yellow)
240V (Red)
Wiring Legend
Factory-Supplied Wiring
Field-Supplied Wiring
Factory-Supplied Busbar
53469
Rev. 5