Delta NT Series - UPS Parallel Wiring Diagram (Single Input)

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Ultron NT Series
4.9.10 UPS Parallel Wiring Diagram (Single Input)
When UPSs are paralleled, the length of each unit's input cables (mains source)
plus output cables must be the same. This ensures that the parallel UPSs can
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UPS 1
I/P O/P
CNQ7
CNQ8
I/P
UPS 2
I/P O/P
Parallel Cable
CNQ7
CNQ8
UPS 8
I/P O/P
CNQ7
CNQ8
IP1
IP2
IP8
OP2
LOAD
OP8
OP1
IP1+OP1=IP2+OP2=………..=IP8+OP8
NOTE:
When the total number of the parallel UPS units is more than four, please
install a load sharing choke between each parallel UPS and its connected
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For more information, please contact your local dealer, sales representative
or Delta customer service.