Parallel Units Wiring - Delta Modulon DPH Series User Manual

5.5.4

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
relevant conditions have been met.
Step 1
For single input, please follow Step 1 ~ Step 7 mentioned in
Unit)
.
For dual input, please follow Step 1 ~ Step 3 mentioned in
Unit)
.
Step 3
Use the provided parallel cables*
Please adopt the Daisy Chain method shown in the figure below. For the parallel port
Figure 4-1
location, refer to
NOTE:
* One parallel cable is provided in each UPS's accessory package.
1
Delta UPS DPH 50-200kVA
5.5 Wiring
to connect the parallel ports of the parallel units.
1
.
thoroughly and make sure that
5.5.3.1 Single Input (Single
5.5.3.2 Dual Input (Single
62