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All rights reserved throughout the world. Specifications subject to change without notice.
® Liebert is a registered trademark of Liebert Corporation.
All names referred to are trademarks or registered trademarks of their respective owners.
SL-25218_REV0_03-08
Technical Support / Service
United States
800-222-5877 (Outside U.S. 614-841-6755)
upstech@emersonnetworkpower.com
Web site:
www.liebert.com
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Liebert
®
NX
™
3-Phase UPS: 40-120kVA, 60Hz, 480VAC - Site Planning Data
Site Planning Data - 40-120kVA, 60Hz, 480VAC
UPS Rating
Voltage
AC Input
Battery
AC Output
Mechanical Data
kVA
kW
Input
Output
Current (A)
Rec.
OCPD
Nom.
VDC
Max.
Discharge
Current
Dimensions
WxDxH, in. (mm)
Weight
lb. (kg)
Heat Dis.
BTU/hr (kWH)
Cooling Air
CFM (m
3
/hr)
Nom.
Max.
Nom.
OCPD
40
36
480
480
48
66.8
90
480
98
48
70
23.6 x 38.2 x 78.7
(600 x 970 x 2000)
1290 (585)
11,612 (3.4)
620 (1050)
60
54
480
480
72
100.2
125
480
146
72
110
1290 (585)
15,204 (4.5)
620 (1050)
80
72
480
480
96
133.6
175
480
195
96
150
1290 (585)
20,273 (5.9)
620 (1050)
100
90
480
480
120
167.1
225
480
244
120
175
1422 (645)
23,496 (6.9)
920 (1550)
120
108
480
480
144
200.5
250
480
293
144
225
1422 (645)
28,196 (8.3)
920 (1550)
See Notes for Table (below):
1
2,3,5,8,12
6
4
1,3,8,12
1,3,8,12
6
13
14
—
—
Notes for Table
1. Nominal (Nom) current is based on full rated output load at nominal input
voltage.
2. Maximum (Max) current (140% of nominal) is short duration for battery
recharge conditions and low input voltage.
3. UPS input and bypass cables must be run in separate conduit from output
cables.
4. Nominal battery voltage is shown at 2.0 volts/cell per NEC 480-2.
5. For Single Input units only.
For Dual Input units, see “Electrical Data Specification Sheet, 40-120kVA
UPS Module, Single or Dual Input Liebert NX - U3819100.”
6. OCPD = Overcurrent Protection Device. Recommended AC input and AC
output overcurrent protection represents 125% of nominal full load current
(continuous) plus 100% of recharge current (non-continuous) per NEC 215.
7. Minimum-sized grounding conductors to be per NEC 250-122. Parity-sized
ground conductors are recommended. Neutral conductors to be sized for full
capacity per NEC 310-15 (b)(4). References are per NEC 1999.
8. Wiring requirements:
9. All wiring is to be in accordance with national and local electric codes.
10. Minimum access clearance is 3 ft. (0.9m) front and 8 in. (203mm) above
the UPS.
Notes for Table (continued)
11. Top or bottom cable entry through removable access plates. Punch plate to
suit conduit size, then replace.
12. Control wiring and power wiring must be run in separate conduit.
13. Dimensions and weights in table do not include external battery cabinet.
Additional Notes
• Input and output wiring and breakers for a Liebert NX with Softscale technol-
ogy should be sized for the maximum scalable capacity. For example, a 40kVA
Liebert NX that is scalable to 80kVA should be installed with wiring and
breakers rated for an 80kVA configuration.
• If site configuration includes a backup emergency generator, it is recom-
mended that the engine generator set be properly sized and equipped for a
UPS application. Generator options would typically include an isochronous
governor (generator frequency regulation) and a UPS-compatible regulator
(generator voltage regulation). Consult generator manufacturer for required
generator options and sizing.
• If site configuration includes an automatic transfer switch, refer to Liebert
Power Line titled “Criteria for Application of Automatic Transfer Switches
(ATS) With Uninterruptible Power Supply (UPS) Systems,” publication
91K-PLT-48-02. It is also recommended that the transfer switch be equipped
with auxiliary contacts for UPS “on generator” current limit. Consult transfer
switch manufacturer for required transfer switch options and sizing.
• If site configuration requires an external isolated maintenance bypass circuit,
it should be noted that utility AC input might not be in phase with the UPS AC
output. Consult a Liebert sales representative or applications engineer.
AC Input:
3-phase, 3-wire, plus ground
AC Output: 3-phase, 3-wire, plus ground
