
Vertiv
™
|
Liebert
®
NXL
™
Power-Tie Controls
| Rev. 6 | 06/2017
4
Figure 3
Voltage and Current Sensing Terminal
TB1
TB2
TB3
TB4
TB5
TB6
TB19
TB20
TB21
TB22
TB23
TB24
TB25
TB26
TB27
TB28
TB29
TB30
TB31
TB32
TB33
TB34
TB35
TB36
TB37
TB38
TB7
TB8
TB9
TB10
TB11
TB12
TB13
TB14
TB15
TB16
TB17
TB18
1
1
1
1
Future
NOTES:
1. TB1–TB6 are shorting switches . During normal operation , these
devices are open . When button is depressed and turned 90
˚
(locked
position) the associated CT is shorted. Reference Table “CT
SHORTING TABLE” on this sheet.
2. TB19-TB38 are disconnect devices . During normal operation these
devices are closed. All external wiring into TB 19-TB38 must be
fused at the source.
TIE Bus Voltage, Phase A
UPS Source Power Supply
, Phase A
Critical Load Bus, Phase A CT X1
Critical Load Bus, Phase A CT X2
Critical Load Bus, Phase B CT X1
Critical Load Bus, Phase B CT X2
Critical Load Bus, Phase C CT X1
Critical Load Bus, Phase C CT X2
CT SHORTING TABLE
TB1
TB2
TB3
TB4
TB5
TB6
TB#
SHORTS CT
LOAD I PHA
LOAD I PHB
LOAD I PHC
UPS I PHA
UPS I PHB
UPS I PHC
F1
8A
F2
8A
F3
8A
F4
8A
F5
8A
F6
8A
UPS Source, Phase A CT X1
UPS Source, Phase A CT X2
UPS Source, Phase B CT X1
UPS Source, Phase B CT X2
UPS Source, Phase C CT X1
UPS Source, Phase C CT X2
TIE Bus Voltage, Phase B
TIE Bus Voltage, Phase C
Neutral
Critical Load Bus Voltage, Phase A
Critical Load Bus Voltage, Phase B
Critical Load Bus Voltage, Phase C
Neutral
Bypass Source Voltage, Phase A
Bypass Source Voltage, Phase B
Bypass Source Voltage, Phase C
Neutral
UPS Source Voltage, Phase A
UPS Source Voltage, Phase B
UPS Source Voltage, Phase C
Neutral
Future
Future
Future
UPS Source Power Supply
, Phase B
Bypass Source Power Supply
, Phase A
Bypass Source Power Supply
, Phase B
Optional Power Supply
Optional Power Supply
CAUTION:
TB19–TB38 and F1-F6 connected to
HAZARDOUS VOLTAGES
Note 1
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