GE Industrial Solutions TLE Series 225-500 User Manual - Manual (Page 82)

Critical Power
Modifications reserved Page 82/90
GE_UPS_USM_TLE_SUL_M22_M50_1US_V010.docx User Manual TLE Series 225 - 500 UL S1
7.3.6 Complete Parallel System shut-down
NOTE !
The UPS Parallel System and the Load have to be completely powered down.
If eBoost™ option is available, make sure that eBoost™ Operation Mode is disabled
before starting this procedure.
Initial status:
Load supplied from all Inverters of the Parallel System.
1. Perform the command “System shutdown” on anyone of
the units.
Perform the command “System shutdown” through the screen:
Commands 1 / System shutdown / Shutdown.
 Load is disconnected from UPS Parallel System.
 Rectifiers and Inverters are shut down and all Contactors are opened.
 LED ALARM is lit.
Synoptic diagram of first unit Synoptic diagram of other units
2. Open UPS output switch Q1 (Pos. O) on all Units.
Synoptic diagram of first unit Synoptic diagram of other units
3. Disconnect on all Units the Battery from the UPS by opening, if present, the switch CB3 (option)
and then the external Battery protections.
Press “MUTE” key to reset Acoustical Alarm. LED ALARM remains lit.
 Wait 5 minutes for DC-Link Capacitors discharge. Use the MEASURES/Rectifier screen to ensure that the
DC-link1 and DC-link 2 voltage has reached 10Vdc.
4. Disconnect the Utility supply on all Units.
 All LEDs are OFF.
Synoptic diagram of first unit Synoptic diagram of other units
END OF PROCEDURE
DANGER !
It will take 5 minutes for the DC capacitors to discharge.
Open only the front door, do not open any other part of the UPS.