Parallel Units Wiring - Delta DPS Series User Manual

5.4.4

Parallel Units Wiring

NOTE:
1. Up to eight UPS units can be paralleled for redundancy and capacity
expansion. Only the UPSs with the same capacity, voltage, frequency and
version can be paralleled. For parallel connection, please use the provided
parallel cable only; otherwise, parallel functions will fail.
2. When the UPSs are paralleled, the length of each unit's bypass input cables
plus output cables must be the same. This ensures that the parallel UPSs can
equally share the critical loads in Bypass mode.
3 Before wiring, please read 5.4 Wiring thoroughly and make sure that relevant
conditions have been met.
Step 1
For single input, follow Step 1 ~ Step 7 mentioned in 5.4.3.1 Single Input (Single Unit).
For dual input, follow Step 1 ~ Step 3 mentioned in 5.4.3.2 Dual Input (Single Unit).
Step 2
Use the provided parallel cables*
adopt the Daisy Chain method shown in the figure below. For the parallel port location, refer
to Figure 4-1. For top or bottom cable entry, refer to 4.3 Cable Routing for the
Communication Interfaces.
NOTE:
1
* One parallel cable is provided in each UPS's accessory package.
Ultron DPS Series
1
to connect the parallel ports of the parallel units. Please
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