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L
N
L
N
J1
J2
+
-
L1
L2
L3
N
L
N
L
N
L1
L2
L3
N
To Main O/P
Breaker
UPS2 Main1 I/P Breaker
UPS2 Main2
I/P Breaker
UPS2 O/P Breaker
2# Baterry
Package
1# Battery
Package
UPS1 O/P Breaker
UPS1 Main2
I/P Breaker
UPS1 Main1
I/P Breaker
J1
J2
+
-
Main1 I/P Ground
Main2 I/P Ground
O/P Ground
+
-
+
-
To Main1 I/P
Breaker
To Main2 I/P
Breaker
MAIN1 INPUT
OUTPUT
PARALLEL
BATTERY
MAIN2 INPUT
,OM
Input and output Terminal Block wiring diagram
8) The distance between the UPS in parallel and the breaker panel is required to be
less than 20 meters. The difference between the wires of input and output of the
UPS is required to be less than 20%.
9) Do not switch on the output breaker of each UPS, switch on the input breaker of
the each UPS, the UPS should work in bypass with output, observe their display
to check if there are any warning or fault information, measure the output voltage
of each UPS separately to check if the voltage difference between them is less
than 1V. If the difference is more than 1V, check the wiring.