Reconnect A Ups Unit To A Parallel System - GE 400 User Manual

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.
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
Modifications reserved
OPM_SGS_USM_M40_M50_2US_V010.doc
Overall test results
Test1 OK
Test2 OK
Test3 OK
Test4 OK
Test5 OK
Test6 OK
Synoptic diagram of other units
User Manual SG Series 400 & 500 UL S2
Test7 OK
Test8 OK
Test9 OK
Test10 OK
Test11 OK
Continue ►
Page 67/79