Delta Modulon DPH series - Page 95

5-19
5
ௐ
ௐ
Installation and Wiring
Input Breaker
or Switch (Q1)
Bypass Input
Terminals
(R/ S/ T/ N)
Manual Bypass
Breaker or
Switch (Q3)
UPS Output
Terminals
(R/ S/ T/ N)
Output Breaker
or Switch (Q4)
Battery Input
Terminals
(+/ -/ N)
Delta or non-Delta External
Maintenance Bypass Cabinet
Rear of
the UPS
External Battery Cabinet
Main AC Source
Main AC Source
Loads
(Figure 5-15: Single Unit Single 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.
10
Follow Figure 5-16 to ground the UPS, external battery cabinet(s), Delta or non-
Delta external maintenance bypass cabinet and connected critical loads.
UPS
Grounding
UPS
Grounding
External Battery
Cabinet Grounding
Load
Grounding
Load Grounding
Load Grounding
External
Battery
Cabinet
External
Battery
Cabinet
External
Battery
Cabinet
External
Battery
Cabinet
Load Load Load
Delta or non-Delta
External Maintenance
Bypass Cabinet
UPS
Protective Earthing
(At Maximum Four)
(Figure 5-16: Grounding Diagram_ Single Unit)