Complete Ups Shutdown - GE 8 Series Operating Manual

8.1.4 Complete UPS shutdown

NOTE !
Follow this procedure only in case the UPS system and the load must be completely
powered-down.
With the UPS in normal operation and the inverter supplying the load, the switches Q1 and Q4 are
closed (Pos. I), Q2 is open (Pos. O), and the battery fuses F8 – F9 are inserted.
The synoptic diagram must display the status "LOAD
SUPPLIED BY INVERTER".
1. Disconnect the inverter by pressing "Inverter OFF" ( O ) key and hold until the LED Inverter (5)
turns OFF.
Load is transferred to mains by automatic bypass.
LED Alarm is lit and the LED Operation is Off.
The synoptic diagram must display the status "LOAD SUPPLIED
BY AUTOMATIC BYPASS".
2 Press "Load Off" key.
The output contactor K6 open and the UPS output will be powered down.
3. Open the input rectifier switch Q4 (Pos. 0).
LED Alarm blinks and the acoustical alarm is activated, press "MUTE" key to reset it.
LED Alarm remains lit.
4. Open the output switch Q1 (Pos. 0).
5. Disconnect the battery removing the battery fuses F8 – F9.
The electronic boards and the control panel are still powered from AC power supply through the plug X8 on
the "P1 - Power Interface" (Warning! This board will remain powered from the mains throughout this
procedure!).
The acoustical alarm is activated, press "MUTE" key to reset it.
6. Disconnect the mains from the input distribution only when the DC-Link voltage results to be
below 20 Vdc (see screen METER / BATTERY / V).
The UPS is now voltage free, except for battery voltage in case the battery is integrated in the UPS cabinet.
All the LEDs and the LCD display must be OFF.
WARNING !
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.
Modifications reserved
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Operating Manual SitePro 10-15-20-30-40 kVA / S8