Delta DPH-300K, User Manual

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5 - 2 4 Modulon DPH Series
5.5.4 Parallel Unit Wiring
WARNING:
1. Only authorized Delta engineers or service personnel can perform installation,
wiring, panel & cover removal, maintenance and operation. If you want to
execute any action mentioned above by yourself, the action must be under the
supervision of authorized Delta engineers or service personnel.
2. Up to eight UPS units can be paralleled for redundancy and capacity
expansion. Only the UPSs with the same capacity, voltage, frequency, version
and serial No. can be paralleled. For version and serial No. information, please
refer to
9HUVLRQ 61
. Please only use the provided parallel cable to
parallel the UPS units. Otherwise, parallel functions will fail.
3. When the UPSs are paralleled, the length of each unit’s bypass input cables
plus output cables must be the same. This ensures that the parallel UPSs can
equally share the critical loads in bypass mode.
UPS1
L1
L2
L3
L4
UPS2
1. L1 ~ L4: Length of Wiring Cable
2. L1 + L3 = L2 + L4 = ...
Input Distribution Panel
Output Distribution Panel
4. The UPS’s rating voltage is 220/ 380Vac, 230/ 400Vac, or 240/ 415Vac; the
external battery cabinet’s rating voltage is ±240Vdc.
5. Before wiring, please read
:LULQJ
thoroughly and make sure relevant
conditions have been met.
y
Single Input (Parallel Units)
When there is only one AC power source, parallel units’ wiring procedures are as follows.
1
Please follow the procedures
1
~
6
stated in the section of
6LQJOH,QSXW6LQJOH
8QLW
).
2
Connect the cables of the main AC source, output and external battery cabinet(s) to
the UPS. There are two types of wiring, top wiring and bottom wiring. Please refer to
the following to perform wiring