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7 – Wiring
(continued)
7-8 AC Input/Output Wiring (Parallel UPS – Single Input)
Parallel Redundancy Warnings:
•
The total input cable length must be equal to the total
output cable length in order to prevent unbalanced load
sharing between two UPS systems under reserve mode
(i.e. IP1 + OP1 = IP2 + OP2; deviation must be <10%).
•
Parallel redundancy only supports 2 UPS systems (1+1
redundancy ). Do not attempt to link more than two UPS
systems via parallel redundancy.
•
The UPS systems must have the same rating and capacity
for parallel redundancy installation. Attempting to link
dissimilar UPS systems will damage the UPS systems
and create a serious risk of personal injury and property
damage.
•
Follow the steps in
Section
1
in the diagram.
•
2
Connect the included parallel redundancy cable
redundancy port
of each UPS system.
B
7-7, wiring the UPS systems as shown
to the parallel
A
AC I/P
IP1
UPS1
Main I/P
IP2
UPS2
Main I/P
1
B
2
21
OP1
O/P
Parallel Port
Load
O/P
OP2
Parallel Port
B
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Capítulos
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