Parallel Units Wiring - Delta Modulon DPH Series User Manual

Dual Input (Single Unit)
When there are two AC power sources, single unit wiring procedures are as follows.
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2
3
4

5.5.4 Parallel Units Wiring

NOTE:
1. Only authorized Delta engineers or service personnel can perform installation,
2. Up to eight UPS units can be paralleled for redundancy and capacity expansion.
3. When the UPSs are paralleled, the length of each unit's bypass input cables
4. The UPS's rating voltage is 220/ 380Vac, 230/ 400Vac or 240/ 415Vac.
5. The external battery cabinet's rating voltage is ±240Vdc.
6. Before wiring, please read 5.5 Wiring thoroughly and make sure relevant
Modulon DPH Series
Follow
input into dual input.
Follow the procedures
Unit).
Connect the cables of the main AC source, bypass source, output and external
battery cabinet(s) to the UPS. Please refer to the following to perform wiring.
Figure 5-8: Wiring Terminals_ AC Input, Bypass Input & UPS Output
Figure 5-9: Wiring Terminals_ Battery Input
Figure 5-10: Wiring Terminals_ Grounding
Table 5-3: Wiring Terminals & Wiring Information
5.6 External Battery Cabinet Connection Warnings
NOTE:
For dual input, the UPS will not work normally if the main AC power's
connected to the AC Input neutral (N) terminal shown in Figure 5-8.
Follow Figure 5-13 to ground the UPS, external battery cabinet(s) and connected
critical loads.
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.
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
7.11.7 Version & S/N. Please only use the provided parallel cable to parallel the
UPS units. Otherwise, parallel functions will fail.
plus output cables must be the same. This ensures that the parallel UPSs can
equally share the critical loads in bypass mode.
conditions have been met.
1 8
~ stated in the section of Single Input (Single
5-16
to modify the UPS from single