Delta Modulon DPH series User Manual page 99

3Ø4W
Main AC Source
6 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.
7 Follow Figure 5-19 to ground the parallel UPS units, external battery cabinet(s),
Delta or non-Delta external maintenance bypass cabinets and the connected critical
loads.
Delta or non-Delta
External Maintenance
Load Load Load
Bypass Cabinet
Load
Grounding
Load Grounding
Load Grounding
Protective Earthing
AC Input
Terminals
UPS 1
AC Input
Terminals
UPS 2
AC Input
Terminals
UPS 8
(Figure 5-18: Parallel Units Single Input Wiring Diagram)
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.
(UPS: At Maximum 8 Units)
UPS UPS
UPS
Grounding
UPS Grounding
Delta or non-Delta External
Maintenance Bypass Cabinet Grounding
External Battery Cabinet Grounding
(Figure 5-19: Grounding Diagram_ Parallel Units)
UPS Output
Terminals
Parallel Port
Parallel Port
UPS Output
Terminals
Parallel Port
Parallel Port
UPS Output
Terminals
Parallel Port
Parallel Port
(UPS: At Maximum 8 Units)
Delta or
non-Delta
External
Maintenance UPS UPS
Bypass
Cabinet
UPS
Grounding
UPS Grounding
5-23
5 Installation and Wiring
Daisy
Chain
Method
3Ø4W
Loads
(At Maximum Four)
External External External
Battery Battery Battery
Cabinet Cabinet Cabinet
External
Battery
Cabinet