39
Chapter 6 Installation and Wiring
y
Dual Input (Single Unit)
When there are two AC power sources, single unit wiring procedures are as follows.
1
Follow
!"#$#%
to modify the UPS into dual in-
put. Please note that only authorized Delta engineers or service personnel can modi-
fy single input/ dual input setup.
2
Please follow steps
1
~
5
stated in section
Single Input (Single Unit)
.
3
Connect the main AC source/ bypass AC source/ output/ external battery cabinet
cables to the wiring terminal block, and do not forget to ground the UPS (please refer
to
Figure 6-13~6-18
).
4
Please follow steps
7
~
8
stated in section
Single Input (Single Unit)
.
(Figure 6-13: 20kVA UPS Single Unit Dual Input Wiring Diagram I )
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
Connects the bypass source
Protective
Device
4-Pole
Contactor
R S T N
R S T N
R S T N
CS
(*CS:
Contactor
Solenoid)
(20kVA Model)
+
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)
Connects the
critical loads
N
T
S
R
3-Pole Breaker
Summary of Contents for Ultron GES203HH33A035
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