Filter
Top Products
Input Isolation Transformer Installation
25
Powerware
®
9155 UPS (8–15 kVA) User’s Guide S 164201553 Rev D www.powerware.com
NOTE Input neutral is supplied by the input isolation transformer.
Table 4. Input Isolation Transformer Terminal Block Wiring
Wire Function Terminal Position Minimum Wire Size* Tightening Torque
Input
L1 TB1-1 2AWG
p
L2 (208V) TB1-2 2AWG
25 lb in
(
2
8
3
N
m
)
L2 (240V) TB1-3 2AWG
(
2
.
8
3
N
m
)
Output
L1 TB1-4 3AWG
p
L2 TB1-5 3AWG
25 lb in
(
2
8
3
N
m
)
Neutral TB1-6 3AWG
(
2
.
8
3
N
m
)
Ground
Output TB1-7 8AWG
25 lb in
Ground
Input TB1-8 8AWG
2
5
l
b
i
n
(2.83 Nm)
*Use o nly 90°C-rated copper wire. Minimum wire size is based on 120/208 full load ratings applied to NEC
Code Table 310-16. Code may require a larger AWG size than shown in this table because of temperature,
number of conductors in the conduit, or long service runs. Follow local requirements.
12. Wire the output of the input isolation transformer terminal
block to the UPS input terminal block (see Table 5 and
Figure 10).
Table 5. UPS Terminal Block Wiring
Wire Function
Terminal
Position
Minimum
Wire Size*
Tightening
Torque
Conduit Connection
(Entry Size)
Input
Ground TB1-1 8AWG
p
L1 TB1-3 3AWG
25 lb in 2” access hole for
Neutral
TB1-4 3AWG
2
5
l
b
i
n
(2.83 Nm)
2
a
c
c
e
s
s
h
o
l
e
f
o
r
1-1/2” conduit
L2
TB1-5 3AWG
Output
L1 TB1-6 3AWG
p
Neutral TB1-7 3AWG
25 lb in 2” access hole for
L2
TB1-8 3AWG
2
5
l
b
i
n
(2.83 Nm)
2
a
c
c
e
s
s
h
o
l
e
f
o
r
1-1/2” conduit
Ground
TB1-9 8AWG
*Use o nly 90°C-rated copper wire. Minimum wire size is based on 120/208 full load ratings applied to NEC
Code Table 310-16.