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7 – Wiring
(continued)
1
7-7 AC Input/Output Wiring (Single UPS)
•
After de-energizing all input and output (AC and DC) of the UPS
1
2
system, remove the terminal block cover from the UPS system.
3
4
•
If you did not connect the ground cable in
2
UPS system's grounding terminal
B
with a 4 AWG (5.189 mm) ground cable. Keep the ground cable
connected at all times after installation.
5
6
•
3
Remove the UPS system's front bezel to expose the circuit
breakers. First, confirm that the main input circuit breaker switch
A
and the bypass input circuit breaker switch
7
Second, confirm that the manual bypass circuit breaker switch
is off. Third, confirm that the output circuit breaker switch
off.
8
4
•
Confirm the phase of each cable, then connect the cables according
to the UPS system terminal block diagram in
9
Section 7-5
for cable size requirements. Cabling should be
protected by flexible conduit and routed through the appropriate
knockouts in the terminal block cover. Warning: Observe proper
phase by connecting R to R, S to S, T to T and N to N. Failure
to observe proper phase will damage the UPS system and
10
create a risk of personal injury and property damage.
11
•
5
Replace the UPS system's terminal block cover.
12
13
14
200706017 93-2688 SU manual 4C.indd 20
200706017 93-2688 SU manual 4C.indd 20
Section
7-6, connect the
A
to your facility's earth ground
B
are both off.
C
D
is
Section
7-3. See
20
+N–
1
B
A
2
D
C
3
R
S
T
N
R
S
T
N
4
+N–
5
B
A
R
S
T
N
11/29/2007 2:02:41 PM
11/29/2007 2:02:41 PM
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