Delta Modulon DPH Series User Manual page 90

Dual Input (Parallel Units)
When there are two AC power sources, parallel units' wiring procedures are as follows.
1
2
3
Main AC
Bypass AC
4
5
Modulon DPH Series
Follow
input into dual input.
Refer to the procedures
Unit).
Connect the main AC source/ bypass source/ output/ external battery cabinet's
cables to each parallel UPS. Please refer to:
Figure 5-16: Single Unit Dual Input Wiring Diagram_ Step 1
Figure 5-17: Single Unit Dual Input Wiring Diagram_ Step 2
Figure 5-20: Parallel Units Dual Input Wiring Diagram
NOTE:
For dual input, the UPS will not work normally if the main AC source and
to the UPS's Input neutral (N).
3Ø4W
Source
3Ø4W
Source
(Figure 5-20: Parallel Units Dual Input Wiring Diagram)
Use the provided parallel cable to connect the parallel ports on the parallel units.
Please refer to Figure 4-3 for the parallel port location.
Follow Figure 5-19 to ground the parallel UPS units, external battery cabinet(s)
and connected critical loads.
WARNING:
each UPS's 'Parallel Group ID' (1 or 2) and 'Parallel ID' (1 or 2) through
the LCD. Otherwise, the parallel UPSs cannot be started. Please refer to
7.10.5 Parallel Setting.
1 7
~ stated in the section of Single Input (Single
UPS Output Terminals
AC/ Bypass Input Terminals
Bypass Input Terminals
UPS 1
UPS Output Terminals
AC/ Bypass Input Terminals
Bypass Input Terminals
UPS 2
5-20
to modify the UPS from single
Daisy Chain
Method
Parallel Port
Parallel Port
Parallel Port
Parallel Port
3Ø4W
Loads