Delta Modulon DPH 200kVA, User Manual, Page: 97 / 232

5-21
5
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Installation and Wiring
Input Breaker
or Switch (Q1)
AC Input Terminals
(R/ S/ T/ N)
Delta or non-Delta External
Maintenance Bypass Cabinet
Rear of
the UPS
Main AC Source
Bypass Breaker
or Switch (Q2)
Bypass AC Source
Manual Bypass
Breaker or
Switch (Q3)
UPS Output Terminals
(R/ S/ T/ N)
Output Breaker or
Switch (Q4)
Battery Input Terminals
(+/ -/ N)
External Battery Cabinet
Bypass AC Source
Loads
Bypass Input Terminals
(R/ S/ T/ N)
(Figure 5-17: Single Unit Dual Input Wiring Diagram)
127(௓
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.
7
Follow
Figure 5-16
to ground the UPS, external battery cabinet(s), Delta or non-
Delta external maintenance bypass cabinet and connected critical loads.
5.5.4 Parallel Units Wiring
127(௓
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 UPSs with the same capacity, voltage and frequency can be paralleled.
Please only use the provided parallel cable to parallel the UPS units. Otherwise,
parallel functions will fail.
3. When 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.
4. The UPS 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.