13
BYPASS BREAKER
INPUT BREAKER
UPS OUTPUT
N
T
S
R
-
N
240V DC 240V DC
AC INPUT
N
T
S
R
+
BATTERY INPUT
R
S
T
N
R
S
T
N
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
+
N
-
Protective
Device
(Disconnect
Device)
Connects
an external
battery
cabinet
(if necessary)
For the external
battery cabinet’s
grounding( )
For the critical
loads’ grounding ( )
For the
UPS
grounding
( )
R S T N
Connects the main AC source
Protective
Device
4-Pole
Contactor
R S T N
R S T N
CS
(*CS:
Contactor
Solenoid)
(20kVA Model)
Connects the
critical loads
N
T
S
R
3-Pole Breaker
(Figure 3-7: 20kVA UPS Single Unit Single Input Wiring Diagram)
3. Installation and Wiring
SUTX20K
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
I
O
ON
OFF
240V DC
240V DC
+
N
-
R
AC INPUT
S
T
N
UPS
OUTPUT
R
S
T
N
INPUT BREAKER
R
S
T
N
BYPASS BREAKER
R
S
T
N
BATTERY INPUT
(40kVA Model)
For the critical loads’
grounding( )
For the external
battery cabinet’s
grounding( )
Connects the
critical loads
N
T
S
R
For the UPS
grounding( )
R S T N
Connects the main AC source
Protective
Device
4-Pole
Contactor
R S T N
R S T N
CS
(*CS:
Contactor
Solenoid)
3-Pole Breaker
+
N
-
Protective
Device
(Disconnect
Device)
Connects
an external
battery
cabinet
(if necessary)
(Figure 3-8: 40kVA UPS Single Unit Single Input Wiring Diagram)
SUTX40K
