5-11
5
Installation and Wiring
NOTE:
If you want to modify the UPS from dual input into single input, please use
the socket wrench to reinstall the three copper bars back.
5.4.3 Single Unit Wiring
NOTE:
1. Before wiring, please read 5.4.1 Pre-wiring Warnings.
2. If your UPS is equipped with a Top Cable Entry Cabinet, please refer to 6. Top
Cable Entry Cabinet for relevant information.
y
Single Input (Single Unit)
When there is only one AC power source, single unit wiring procedures are as follows.
1
Open the front door, take down the panel that covers the wiring terminal block and
you will see the wiring terminal block shown in Figure 5-10.
2
The wiring terminal block includes:
No. Item Function Description
1
AC Input
Block
Connects the main AC
source
Includes three phases (R, S, T) and
one neutral (N) terminals.
2
For the critical loads’
grounding
Includes one grounding terminal.
3
Bypass Input
Block
Connects the bypass AC
source
Includes three phases (R, S, T)
terminals.
4
For the UPS grounding
(safety)
Includes one grounding terminal.
5
UPS Output
Block
Connects the critical
loads
Includes three phases (R, S, T) and
one neutral (N) terminals.
6
Battery Input
Block
Connects an external
battery cabinet
Includes positive (
+
), negative (
-
) and
neutral (N) terminals.
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