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3. Installation and Wiring
For the external
battery cabinet's
grounding( )
+
Connects
an external
N
battery
-
cabinet
(if necessary)
Protective
For the external
battery cabinet's
grounding( )
+
Connects
an external
N
battery
-
cabinet
(if necessary)
(20kVA Model)
I
ON
I
ON
I
ON
I
ON
I
ON
I
ON
I
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
OFF
O
R
S
T
N
R
S
T
INPUT BREAKER
BYPASS BREAKER
-
+
N
R
S
T
AC INPUT
240V DC
240V DC
BATTERY INPUT
3-Pole
Protective
3-Pole
Device
R S T
Device
Connects the bypass source
(Figure 3-10: 20kVA UPS Single Unit Dual Input Wiring Diagram II )
I
ON
I
ON
I
ON
I
ON
O
OFF
O
OFF
O
OFF
O
OFF
R
S
T
N
INPUT BREAKER
-
+
N
R
240V DC
240V DC
BATTERY INPUT
3-Pole
Protective
3-Pole
Device
Protective
Device
Connects the main AC source
(Figure 3-11: 40kVA UPS Single Unit Dual Input Wiring Diagram I )
SUTX20K
ON
I
ON
OFF
O
OFF
N
Protective
N
R
S
T
N
UPS OUTPUT
For the
UPS
grounding
(
)
N
For the critical
loads' grounding ( )
SUTX40K
I
ON
I
ON
I
ON
I
ON
O
OFF
O
OFF
O
OFF
O
OFF
N
R
S
T
BYPASS BREAKER
S
T
N
R
S
T
N
AC INPUT
UPS OUTPUT
R S T
N
For the UPS
grounding ( )
15
3-Pole
Device
R S T N
Connects the main AC source
N
Connects the
T
critical loads
S
R
3-Pole
Protective Device
3-Pole
Protective
Device
R S T N
Connects the bypass source
N
Connects the
T
critical loads
S
R
3-Pole
Protective Device
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