Delta Modulon DPH Series User Manual page 80

To avoid UPS failure, the input of the UPS must be Y connection.
and you require that the VNG of the UPS should be zero, we suggest that you install
an isolation transformer in front of the input side of the UPS, and connect the isolation
transformer's secondary neutral (N) and the ground (
transformer.
in positive phase sequence. Please refer to 5.5.3 Single Unit Wiring and 5.5.4 Parallel
Units Wiring for wiring information.
Check the battery polarity when connecting the external battery cabinet(s) to the UPS.
Do not connect the battery polarity in reverse. For battery connection relevant informa-
tion, please refer to 5.6 External Battery Cabinet Connection Warnings.
Connect the external battery cabinet's grounding terminal (
terminal (
The UPS's grounding terminal (
when wiring. For the location of the UPS's grounding terminal (
ure 5-10.
The UPS default setting is single input. If you want to modify it into dual input, please follow
the procedures below.
1
Open the UPS's two front doors and unscrew the twelve screws to remove the upper
and lower switch panels shown in Figure 5-4. After removing the upper and lower
switch panels, you will see the AC Input terminals and the Bypass Input terminals
shown in Figure 5-5.
Modulon DPH Series
). Please refer to Figure 5-13 and Figure 5-15 for grounding information.
WARNING:
1. Wrong wiring will cause damage to the UPS and electric shock.
2. For single input, the UPS will not work normally if the main AC power's neutral
shown in Figure 5-8.
For dual input, the UPS will not work normally if the main AC power's neutral (N)
the AC Input neutral (N) terminal shown in Figure 5-8.
3. If the UPS is not grounded, the power boards and components might be
damaged after the UPS is powered on.
WARNING:
Only authorized Delta engineers or service personnel can modify single input/ dual
input setup.
) must be grounded. Please use ring-type terminals
5-8
) to the nearest place of the
) to the UPS's grounding
), please refer to Fig-
),
-