GE Industrial Solutions SG Series 400 & 500 Operating Manual - Manual (Page 67)

Modifications reserved Page 67/79
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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