Critical Power
Modifications reserved
Page 83/91
GE_UPS_USM_TLE_SUL_M16_M50_2bU_V010.docx
User Manual
TLE Series 160 - 500 UL S2B
7.3.4
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.
If IEMi option is available, make sure that IEMi 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 “Q1 - UPS Output switch” (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 “CB3 – External
Battery switch” (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
.
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.