18
3. Installation and Wiring
3.6.4 Dual Input Modification
WARNING:
1. Only experienced engineers or service personnel should modify single input/dual input setup.
2. For dual input, the main AC source’s Neutral (N) must be connected with the bypass source’s Neutral (N).
The UPS default setting is single input. To modify it into dual input, follow these steps.
1
Remove the panels shown in the figure below.
(20kVA Model)
(40kVA Model)
1 2
ON
P1 P2 P3 P4 P5 P6
P1 P2
PARALLEL PARALLEL
SWITCH
PARALLEL
REPO CHARGER
DETECTION
INPUT
DRY CONTACT
OUTPUT
DRY CONTACT
MANUAL BYPASS SWITCH
RS-232
WARNING:
OPENING THIS COVER PLATE WILL
CAUSE INVERTER SHUTDOWN.ONLY
AUTHORIZED SERVICE PERSONNEL
CAN OPEN AND OPERATE IT.
BYPASS BREAKER
INPUT BREAKER
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
WARNING:
OPENING THIS COVER PLATE WILL
CAUSE INVERTER SHUTDOWN.ONLY
AUTHORIZED SERVICE PERSONNEL
CAN OPEN AND OPERATE IT.
1 2
ON
WARNING:
OPENING THIS COVER PLATE WILL
CAUSE INVERTER SHUTDOWN.ONLY
AUTHORIZED SERVICE PERSONNEL
CAN OPEN AND OPERATE IT.
MANUAL BYPASS SWITCH
P1 P2 P3 P4 P5 P6
P1 P2
PARALLEL PARALLEL
SWITCH
PARALLEL
REPO CHARGER
DETECTION
INPUT
DRY CONTACT
OUTPUT
DRY CONTACT
RS-232
BYPASS BREAKER
INPUT BREAKER
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
(Figure 3-14: Panel Location)
SUTX40K
SUTX20K