2 7
Ultron HPH Series UPS
y
The input of the UPS must be a Y connection, and the neutral line (N) must be connected
to avoid UPS failure. Do not connect the UPS’s neutral line (N) with the ground terminal
(
).
y
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)
and you require that the VNG of the UPS should be zero, it is suggested an isolation
transformer be installed in front of the UPS input side and the UPS neutral (N) be con-
nected with the ground (
).
y
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rating label. When connecting the utility input power to the UPS, make sure it is in positive
phase sequence.
y
Connect the external battery cabinet’s grounding terminal to the grounding terminal ( )
of the UPS’s battery terminal block. Do not connect the grounding terminal of the external
battery cabinet to any other grounding system.
y
The ground terminal (
) of the UPS must be grounded. Please use ring-type terminal
for wiring.
WARNING:
1. Incorrect wiring will lead to severe electric shock and damage to the UPS.
2. For single input, the UPS will not work normally if the main input power's neutral
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terminal.
For dual input, the UPS will not work normally if the main input power's neutral
1LVQRW¿UPO\FRQQHFWHGRULVQRWFRQQHFWHGWRWKH$&,QSXW%ORFNVQHXWUDO
1WHUPLQDODQGWKHE\SDVVSRZHU¶VQHXWUDO1LVQRW¿UPO\FRQQHFWHGRULVQRW
connected to the Bypass Input Block's neutral (N) terminal.
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WARNING:
1. Only authorized Delta engineers or service personnel can modify single input/
dual input setup.
2. For dual input, the main AC source’s Neutral (N) must be connected with the
bypass source’s Neutral (N).
The UPS default setting is single input. If you want to modify it into dual input, please follow
the following steps.
1
Open the front door and remove the corresponding internal panels. After that, you will
see the wiring terminal block.
