Modifications reserved
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OPM_SGS_USM_M40_M50_2US_V010.doc
User Manual
SG Series 400 & 500 UL S2
7.2.5 Reconnect a UPS unit to a Parallel System
NOTE:
The
Load
is still powered by the other units supplying the
Parallel Bus
.
This UPS unit will be powered on and connected to the
Parallel Bus
in order to share
the
Load
with each other's.
If
eBoost™
option is available, make sure that
eBoost™ Operation Mode
is disabled
before starting the shutdown procedure.
WARNING !
The
High Speed Bus Cable Connecting J52
(A) and
J62
(B) in any case cannot be
connected or disconnected after the system has been powered ON.
The
Bus Terminals
must be properly connected before powering the additional unit.
Open the front door, of the Unit to reconnect, and make sure that:
•
All the
connections
to the input/output bus bars of the UPS have been made correctly.
•
The
protection panels
are fastened in their correct position.
•
The
UPS Output Switch Q1
,
Manual Bypass Switch Q2
(option) and the
External
Battery Switch or
Fuses
must be open (Pos. O)
.
1. Switch-ON the Utility Voltage, on the Unit to reconnect, from the input distribution (both
Rectifier and bypass if separated).
At this stage the electronic power supply is switched ON.
Overall test results
Test1 OK
Test7 OK
Test2 OK
Test8 OK
Test3 OK
Test9 OK
Test4 OK
Test10 OK
Test5 OK
Test11 OK
Test6 OK
The UPS performs a
SELFTEST
.
A successful termination of the tests will be indicated with Overall
test results
“OK”
.
Commissioning cannot be continued should one or more tests
result to be negative.
Please contact in this case your
Service Center
.
With
“Overall test results - OK”
the
Synoptic Diagram
is displayed.
LED 1 (Utility Rectifier OK)
and
LED 2 (Utility Bypass OK)
must be lit.
The buzzer sounds,
press the
“MUTE”
key to reset
acoustical alarm
.
LED Alarm
remains lit.
Synoptic diagram of the unit to reconnect
Synoptic diagram of other units
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