Delta DPS-400K - Parallel Unit Wiring

5-14
Ultron DPS Series
5
Ground the UPS.
O OFF
ON I
O OFF
ON I
O OFF
ON I
O OFF
ON I
Isolate Uninterruptible Power System (UPS)
Then check for Hazardous Voltage between all
terminals including the protective earth
See installation instructions before connecting to the supply
Apparatet er egnet for tilkopling til et IT forsyningsnett
RISK OF VOLTAGE BACKFEED
BEFORE WORKING ON THIS CIRCUIT
T
SR
N
UPS O UTP UT
TSRN
AC INPUT
R
S
T
BYPASS IN PUT
240VD C240VDC
BATTERY INPU T
N
External
battery
cabinet
UPS
output
Main
AC
source
Bypass
AC
source
For the critical
loads’ grounding( )
For the UPS
grounding( )
T
S
R
N
-
N
+
R
S
T
N
R
S
T
(Figure 5-13: Single Unit Dual Input Wiring Diagram)
5.4.4 Parallel Unit Wiring
NOTE:
1. Before wiring, please read 5.4.1 Pre-wiring Warnings.
2. If your UPS is equipped with a Top Cable Entry Cabinet, please refer to 6. Top
Cable Entry Cabinet for relevant information.
y
Single Input (Parallel Units)
When there is only one AC power source, parallel units’ wiring procedures are as
follows.
1
Follow the procedures
1
~
6
stated in the section of Single Input (Single
Unit).
2
Connect the main AC source/ UPS output/ external battery cabinet cables to the
wiring terminal block. Please refer to Figure 5-12, Figure 5-14 and 5.5 External
Battery Cabinet Connection Warnings.
3
Use the provided parallel cable to connect the parallel ports on the parallel units.
Please see Figure 4-1 for parallel port location.
4
Ground the parallel UPSs.