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8 Installation
Notes
1. Nominal (NOM) current is based on full rated output load.
2. Maximum (MAX) current (125% of NOM) is short duration for battery recharge conditions.
3. UPS input and bypass cables must be run in separate conduit from output cables.
4. If the UPS module is to be upgraded in the future, it is recommended that the AC input, bypass AC input, battery, and AC output wiring and overcurrent
protection be sized initially for the future upgraded size.
5. Nominal battery voltage is shown at 2.0 volts/cell per NEC 480-2.
6. Power cables from UPS DC link to batteries should be sized for a total maximum 2.0 volt line drop (measured at UPS) at maximum discharge current.
7. Recommended bypass AC input and AC output overcurrent protection represents 125% of nominal full load current (continuous) per NEC 220-2(a).
8. UPS output load cables must be run in separate conduit from input and bypass cables.
9. Minimum sized grounding conductors to be per NEC 250-95. Parity sized ground conductors are recommended. Neutral conductors to be sized for full
capacity per NEC-16 Note 10.
10. Wiring requirements:
AC INPUT: 3-phase, 3-wire plus ground (unit supplied with input isolation transformer).
3-phase, 4-wire plus ground (unit supplied with input auto transformer).
AC OUTPUT: 3-phase, 4-wire plus ground.
DC INPUT: 2-wire (positive and negative), plus ground.
11. All wiring is to be in accordance with national and local electrical codes.
12. Minimum access clearance is 3 feet front and 1 foot above UPS.
13. Top or bottom cable entry through removable access plates. Cut plate to suit conduit size, then replace.
14. Control wiring and power wiring must be run in separate conduit.
15. Battery cabinet not included.
Additional Notes
1. If site configuration includes a back-up emergency generator, it is recommended 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.
2. If site configuration includes an automatic transfer switch, refer to the Liebert Power Line titled “Criteria for Application of Automatic Transfer Switches
(ATS) with Uninterruptible Power Supply (UPS) Systems.” 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.
3. If site configuration requires an external isolated maintenance bypass circuit, it should be noted that the Utility AC input is not
in phase with the UPS AC
output, with the optional delta-wye input isolation transformer. Consult with sales representative or UPS applications engineer.
Table 2 Site Planning Data, Series 300 DT, Dual Input 10 to 50 kVA
Model
Power
Rating Voltage
Rectifier
AC Input
Rectifier
AC Input
with Optional
Input Filter
Battery AC Output Mechanical Data
Current
Rec
** Current
Rec
**
Nominal
Voltage
Full
Load
Max.
Dis-
charge
Current
Current
Rec
**
Dimen-
sions Weight
DFL
Lb./
Ft.
2
Heat
Dis-
sipa-
tion
BTU/
hr.
Cooling
Air
CFM
kVA kW
VAC/Freq
Nom Max Nom Max kW Nom (WxDxH)
312
*
10 8 208/60Hz
240/60Hz
480/60Hz
600/60Hz
35A
29A
15A
12A
44A
36A
19A
15A
60A
50A
25A
20A
30A
26A
13A
11A
37A
32A
16A
14A
50A
40A
20A
20A
204VDC
(102 cells)
9.3 58A 28A
24A
12A
10A
35A
30A
15A
15A
36x28x72 in
91x72x183 cm
1100 lbs
499 kg
157 6000 600
322
*
15 12 208/60Hz
240/60Hz
480/60Hz
600/60Hz
50A
43A
22A
18A
63A
54A
28A
23A
80A
70A
40A
30A
44A
38A
19A
15A
55A
48A
24A
19A
70A
60A
30A
25A
204VDC
(102 cells)
13.8 85A 42A
36A
18A
14A
60A
45A
25A
20A
36x28x72 in
91x72x183 cm
1100 lbs
499 kg
157 8000 600
332
*
20 16 208/60Hz
240/60Hz
480/60Hz
600/60Hz
65A
56A
28A
23A
81A
70A
35A
29A
100A
90A
50A
40A
57A
50A
25A
20A
72A
62A
31A
25A
90A
80A
40A
30A
360VDC
(180 cells)
17.8 62A 56A
48A
24A
20A
70A
60A
30A
25A
36x28x72 in
91x72x183 cm
1400 lbs
635 kg
200 8900 800
342
*
30 24 208/60Hz
240/60Hz
480/60Hz
600/60Hz
96A
83A
42A
33A
120A
104A
53A
41A
150A
125A
70A
50A
85A
74A
37A
29A
106A
92A
46A
37A
150A
110A
60A
50A
360VDC
(180 cells)
26.4 92A 83A
72A
36A
29A
125A
90A
50A
40A
36x28x72 in
91x72x183 cm
1400 lbs
635 kg
200 12300 1050
347
*
40 32 208/60Hz
240/60Hz
480/60Hz
600/60Hz
128A
111A
55A
44A
160A
139A
69A
55A
200A
175A
90A
70A
113A
98A
49A
39A
142A
123A
61A
49A
175A
150A
80A
60A
360VDC
(180 cells)
35.2 122A 111A
96A
48A
39A
150A
125A
60A
50A
36x28x72 in
91x72x183 cm
1900 lbs
862 kg
271 16400 1050
357
*
50 40 208/60Hz
240/60Hz
480/60Hz
600/60Hz
158A
137A
68A
55A
198A
171A
85A
69A
250A
225A
110A
90A
140A
122A
61A
49A
175A
152A
76A
61A
225A
200A
100A
80A
360VDC
(180 cells)
43.7 150A 139A
120A
60A
48A
175A
150A
80A
60A
36x28x72 in
91x72x183 cm
1900 lbs
862 kg
271 18700 1050
Applicable
Notes:
—123,4
9,10
11
13
14
123,4
9,10
11
13
14
5—4,6
9
11
13
14
14,7
8,9
11
13
14
12,13,15 15 15 — —
For explanation of
Applicable Notes,
see referenced numbers in
Notes
below.
*Field-upgradeable to next larger model
**Rec = Recommended External Overcurrent Protection
DFL = Distributed Floor Loading