Delta Modulon DPH 200kVA, User Manual, Page: 101 / 232

5-25
5
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Installation and Wiring
UPS 1
UPS 2
UPS 8
3Ø4W
3Ø4W
3Ø4W
Main AC Source
Bypass AC Source
Loads
AC Input
Terminals
Bypass Input Terminals
Bypass Input Terminals
Bypass Input Terminals
AC Input
Terminals
AC Input
Terminals
UPS Output
Terminals
Parallel Port
Parallel Port
Parallel Port
Parallel Port
Parallel Port
Parallel Port
UPS Output
Terminals
UPS Output
Terminals
Parallel Cable
Parallel Cable
Parallel Cable
Daisy
Chain
Method
(Figure 5-20: Parallel Units Dual Input Wiring Diagram)
127(௓
The UPS will not work normally if the main AC source’s neutral (N)
is not firmly connected or not connected to the Delta or non-Delta External
Maintenance Bypass Cabinet’s AC Input neutral (N) terminal.
7 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.
8
Follow
Figure 5-19
to ground the parallel UPSs, external battery cabinet(s), Delta
or non-Delta external maintenance bypass cabinets and connected critical loads.
WARNING:
Before start-up of the parallel units, qualified service personnel must set
each UPS’s
‘Parallel Group ID’ (1 or 2) and ‘Parallel ID’ (1~8) through
the LCD. Otherwise, the parallel UPSs cannot be started. Please refer to
7.10.5 Parallel Setting
.
5.6 External Battery Cabinet Connection Warnings
You should connect the UPS with at least one external battery cabinet to ensure that the
connected critical loads are protected when a power failure occurs. You can connect up to
four units of external battery cabinets to the UPS.