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3. Installation and Wiring
For the external
battery cabinet's
grounding( )
Connects
+
an external
N
battery
-
cabinet
(if necessary)
3-Pole
Protective
Device
SUTX40K
(40kVA Model)
I
ON
I
ON
I
ON
I
ON
I
ON
I
ON
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
R
S
T
N
R
S
INPUT BREAKER
BYPASS BREAKER
-
+
N
R
S
T
AC INPUT
240V DC
240V DC
BATTERY INPUT
3-Pole
Protective
Device
R S T
Connects the bypass source
(Figure 3-12: 40kVA UPS Single Unit Dual Input Wiring Diagram II )
16
I
ON
I
ON
O
OFF
O
OFF
3-Pole
T
N
Protective
Device
Connects the main AC source
N
R
S
T
N
UPS OUTPUT
3-Pole
Protective Device
N
For the UPS
grounding(
)
R S T N
For the critical loads'
grounding( )
N
Connects the
T
critical loads
S
R
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