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Notes
1. Nominal (NOM) current is based on full rated output load.
2. Maximum (MAX) current includes the short duration for battery recharge conditions.
3. UPS input cables must be run in separate conduit from output cables.
4. Reserved.
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 AC output overcurrent protection represents 125% of nominal full load current (continuous) per NEC 220-3(a).
8. UPS output load cables must be run in separate conduit from input 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 310-16 Note 10.
10. Wiring requirements:
AC Output: 3-phase, 4-wire plus ground
DC Input: 2-wire (positive and negative) plus ground
Single Source AC Input: 3-phase, 4-wire plus ground
Dual Source AC Input:
Converter Input: 3-phase, 3-wire plus ground
Bypass Input: 3-phase, 4-wire 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 the UPS.
13. Top or bottom cable entry through removable access plates. Cut plate to suit conduit size, then replace.
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. Consult transfer switch manufacturer for required transfer switch options and sizing.
Table 1 Site Planning Data
Model
Power
Rating
Volt-
age
Single
AC Input
(Amp)
Dual AC Input
(Amp)
Battery
AC Output
(Amp)
Mechanical Data
Converter Bypass
Nom-
inal
Volt-
age
Full
Load
kW
Max.
Dis-
charge
Cur-
rent
Current
Dimen-
sions
Weight
lbs (kg)
Heat
Dis-
sipa-
tion
BTU/
hr.
Cooling
Air
CFMkVA kW
VAC
Nom Max REOP Nom Max REOP Nom REOP Nom REOP
WxDxH
inches (cm)
S312 12 8.4 208
240
400
480
600
33
29
17
14
12
40
35
21
18
14
50
50
30
30
20
28
24
15
13
10
35
30
19
16
13
50
40
30
20
15
33
29
17
14
12
50
40
30
20
15
240 9.9 51 33
29
17
14
12
50
40
30
20
15
29x27.25x62
(74x69x157)
*41x27.25x62
*(104x69x157)
700
(318)
*1250
*(567)
4000
*4700
1000
S316 16 11.2 208
240
400
480
600
44
38
23
19
15
54
46
28
23
19
70
60
40
30
30
37
32
20
16
13
46
39
25
21
16
60
50
30
30
20
44
38
23
19
15
60
50
30
30
20
240 13.2 67 44
38
23
19
15
60
50
30
30
20
29x27.25x62
(74x69x157)
*41x27.25x62
*(104x69x157)
700
(318)
*1250
*(567)
5300
*6300
1000
S320 20 14 208
240
400
480
600
56
48
29
24
19
67
58
35
29
23
100
70
50
40
30
46
39
25
21
16
58
49
31
26
21
70
60
40
40
30
56
48
29
24
19
80
70
40
30
30
240 16.5 84 56
48
29
24
19
80
70
40
30
30
29x27.25x62
(74x69x157)
*41x27.25x62
*(104x69x157)
700
(318)
*1250
*(567)
6500
*7800
1000
S324 24 16.8 208
240
400
480
600
67
58
35
29
23
80
70
42
35
28
100
100
60
50
40
55
47
29
24
20
69
59
37
31
24
100
80
50
40
30
67
58
35
29
23
100
80
50
40
30
240 19.8 101 67
58
35
29
23
100
80
50
40
30
29x27.25x62
(74x69x157)
*41x27.25x62
*(104x69x157)
700
(318)
*1250
*(567)
7200
*8500
1000
Appli-
cable
Notes:
——123,9
10
11
13
14
123,9
10
11
13
14
13,9
10
11
13
14
5—6,9
10,11
13,14
17,8,9
10
11
13
14
12,13,14,15 15 — —
For explanation of
Applicable Notes,
see referenced numbers in
Notes
below.
REOP = Recommended External Overcurrent Protection
*Dimensions, Weights, and Heat Dissipation for 400, 480, and 600 VAC models