Parallel Ups Shutdown With Load Transfer On Manual Bypass Q2 - GE LP 33 Series Operating Manual

8.2.2 Parallel UPS shutdown with load transfer on manual bypass Q2

The purpose of this procedure is to supply the load directly by mains through manual bypass Q2.
This procedure is normally performed when the System Parallel must be completely switched OFF for
maintenance or service purpose, performed by an authorised Service Centre.
The synoptic diagram, on all UPS units, must display the status
"LOAD SUPPLIED BY INVERTER".
1. Disconnect the inverter by pressing "Inverter OFF" ( O ) key and hold until the LED Inverter (7)
turns OFF on all UPS units.
The output will be supplied by the mains through all automatic
bypass.
LEDs Alarm are lit and the LEDs Operation are Off.
The synoptic diagram, on all UPS units, must display the status
"LOAD SUPPLIED BY AUTOMATIC BYPASS".
2. Close the manual bypass switch Q2 (Pos. I) on all UPS units.
Load is now supplied from mains in parallel from automatic bypass and manual bypass Q2 of all UPS units.
The synoptic diagram, on all UPS units, must display the status
"LOAD SUPPLIED BY AUTOMATIC BYPASS AND MANUAL BYPASS
Q2".
3. Open the output switch Q1 (Pos. 0) on all UPS units.
The load is now supplied only through the manual bypass Q2.
The synoptic diagram, on all UPS units, must display the status
"LOAD SUPPLIED BY MANUAL BYPASS Q2".
4. Press "Total Off" key on all UPS units.
5. Remove the external battery fuses on each unit.
In case of GE battery cabinet:
− Open fully and remove the cover of fuse-holder by using correctly the handle;
− Remove the fuses from their place, re-install and close fully the cover of fuse-holder.
The acoustical alarm is activated, press "MUTE" key to reset it.
Modifications reserved
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Operating Manual LP 33 Series 60-80-100-120 kVA / S2