GE Industrial Solutions TLE Series 225-500 User Manual - Manual (Page 78)

Critical Power
Modifications reserved Page 78/90
GE_UPS_USM_TLE_SUL_M22_M50_1US_V010.docx User Manual TLE Series 225 - 500 UL S1
7.3.4 Separate a UPS unit from the Redundant Parallel System
NOTE !
If eBoost™ option is available, make sure that eBoost™ Operation Mode is disabled
before starting this procedure.
NOTE !
The Load is powered by the UPS Redundant Parallel System.
One UPS unit of the Parallel System has to be turned Off, while the Load is shared
between the other units supplying the parallel bus.
WARNING !
The control bus cable connecting J1A - J2A and J1B - J2B cannot be connected or
disconnected after the system has been powered on.
Initial status :
Load supplied from all Inverters of the
Redundant Parallel System.
1. Disconnect the Inverter performing the “Inverter OFF” command on the Unit to separate.
1 - Perform the “Inverter OFF” command from the screen:
Commands 1 / Inverter / OFF.
2 - Repeat the “Inverter OFF” command from the screen:
Commands 1 / Inverter / OFF.
With redundant system, performing the “Inverter OFF” command the Inverter shuts down and it will stay OFF.
Performing the “Inverter OFF” command the Load is transferred to the Utility and the Inverter remains
operating, it means the system is not redundant.
In this case is not possible to switch-OFF one unit without transferring the Load on Utility.
 Load supplied from Inverter(s) of the other Unit(s) of the Parallel System.
Synoptic diagram of the unit to separate Synoptic diagram of other units
2. Open UPS output switch Q1 (Pos. O) on the Unit to separate.
 LED ALARM is lit.
Synoptic diagram of the unit to separate Synoptic diagram of other units
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