INPUT CABLING AND PROTECTION
Table below applies to:
1. A stand-alone UPS or
2. A UPS equipped with a Maintenance Bypass Cabinet (without transformer)
Max. System
Load Rating
Input Voltage – 208VAC
Max. Current
Min. Input Protection
in UPS mode
Circuit Breaker
Input Voltage – 240VAC
Max. Current
Min. Input Protection
in UPS mode
Circuit Breaker
4kVA
18 amps
50 amps
15 amps
50 amps
8kVA
36 amps
50 amps
31 amps
50 amps
12kVA
53 amps
75 amps
46 amps
75 amps
16kVA
70 amps
100 amps
62 amps
2
Terminal Block
Details
90 amps
2
Maximum: 35mm (2 AWG); Minimum: 16mm (6 AWG)
Torque Rating: 2.5-3.0 Nm (22-26 in/lbs)
UPS With Maintenance Bypass Cabinet (With Transformer)
Single Input Feed: All UPS ratings must use 100A input circuit breaker protection.
Dual Input Feed: See table below.
Max.System
Load Rating
UPS Feed
Input Voltage – 208VAC
Input Voltage – 240VAC
Max. Current Min. Input Protection Max. Current Min. Input Protection
in UPS mode
Circuit Breaker
in UPS mode
Circuit Breaker
Bypass Feed
208V or 240V
Min. Input Protection
Circuit Breaker
4kVA
18 amps
50 amps
15 amps
50 amps
100 amps
8kVA
36 amps
50 amps
31 amps
50 amps
100 amps
12kVA
53 amps
75 amps
46 amps
75 amps
100 amps
16kVA
70 amps
100 amps
62 amps
90 amps
100 amps
35mm2 (2
Terminal Block
Details
16mm2 (6
Maximum:
AWG); Minimum:
AWG)
Torque Rating: 2.5-3.0 Nm (22-26 in/lbs)
Bypass Voltage Jumper Position (TB2)
Bypass Voltage Selection
208VAC
240VAC
(Factory Default)
(Field Change)
Jumper/link
on upper
two screws
Jumper/link
on lower
two screws
Liebert Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
© 2005 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change without
notice.
® Liebert and the Liebert logo are registered trademarks of Liebert Corporation. All
names referred to are trademarks or registered trademarks of their respective owners.
Telephone: 1-800-877-9222
Facsimile: 1-614-841-6022
www.liebert.com
While every precaution has been taken to ensure the accuracy and completeness of
this literature, Liebert Corporation assumes no responsibility and disclaims all liability
for damages resulting from use of this information or for any errors or omissions.
SL-23951 (7/05) Rev. 3
THIS LABEL MUST BE REMOVED PRIOR TO OPERATING THE UPS
OUTPUT CABLING
UPS Output Terminal Block (TB3)
Connection to External Panel Boards
208VAC
If connected equipment operates at 208VAC only, use a single-phase panel board connected to the UPS as follows.
Setup 1 - 208VAC
Max output current = 77A
Panel Board Input
1
208VAC
1
2
208VAC
3
L
2
L
3
4
GEC
Grounding Electrode
Conductor (Field
connection must be made)
UPS Output TB3
4
GEC
5
5
G
G
208VAC and 120VAC
If connected equipment is a combination of 208VAC and 120VAC, use a three-phase panel board connected to the UPS
as follows.
Setup 2 - 120VAC
Max output current = 67A
each 120VAC circuit
208VAC also
available as shown
connected in
Setup 1
120VAC
120
VAC
GEC
Grounding Electrode
Conductor (Field
connection must be made)
Panel Board Input
1
2
3
4
120VAC
(N to L3
only)
208VAC
(L1 to L2)
120VAC
(N to L1)
Note: L2 to N is 88VAC
L3
1
L2
2
L1
3
N
4
GEC
5
G
5
G
UPS Output TB3
CAUTION: It is important for the installing electrician
to clearly identify the connections for future reference.
Refer to NEC 215-8 and 210-4(d).
240VAC and/or 120VAC
If connected equipment operates at 240VAC only or 120VAC only or is a combination of both, use a single-phase panel
board connected to the UPS as follows.
Setup 3 - 240VAC
Max output current = 67A
120VAC also
available as shown
connected in
Setup 2
240VAC
2
3
4
GEC
Grounding Electrode
Conductor (Field
connection must be made)
Panel Board Input
UPS Output TB3
L
1
1
5
G
120VAC
240VAC
120VAC
2
L
3
N
4
GEC
5
G