GE Industrial Solutions LP 33U Series 10 & 20 kVA Operating Manual - Manual (Page 55)

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OPM_LPS_3UO_10K_20K_1US_V010.doc Operating Manual LP 33U Series 10 & 20 kVA / S1
7.2.3 From Manual Bypass Q2 to normal function VFI
This procedure presupposes that the load is powered by all manual bypass Q2 switch of the Parallel
System, and:
• The inverter is switched OFF;
• The manual bypass switch Q2 is closed (Pos. I);
• The output switch Q1 is open (Pos. 0);
• The “Rectifier input fuses - F1, F2, F3” and “Battery fuses - F9, F10, F11/ F13, F14, F15” are removed.
• LED Alarm blinks.
The synoptic diagram, on all UPS units, must display the status
“LOAD SUPPLIED BY MANUAL BYPASS Q2”.
1. Insert the “rectifier input fuses - F1, F2, F3” and the “battery fuses - F9, F10, F11 / F13, F14, F15”
(and eventual external battery fuses) on all UPS units.
2. Close the output switch (Pos. I) on all UPS units.
When the last Q1 will be closed the output will be from utility 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”.
` Home\Commands
COMMANDS
RESET TOTAL OFF
REQUEST TOTAL OFF
3. Only in case it has been previously activated, restore the
command “Total Off” on any one of the units by entering
the screen: COMMANDS/RESET TOTAL OFF
V 
` Home\Meter
BOOSTER
f : 60.0 Hz
L1 : 120 V
L2 : 120 V
L3 : 120 V
Vp : 215 V
Vn : 215 V
4. Open the manual bypass switch Q2 (Pos. 0) on all UPS units.
The load is supplied by the utility through the automatic bypass.
Verify on all UPS units, selecting the screen METERING/BOOSTER/Vp
and Vn, that the booster voltage has reached about 215 Vdc.
5. Insert the inverter by pressing “Inverter ON” ( I ) key on first UPS unit.
In case of sufficient output power, the output will transfer to
Inverter.
LED Alarm turn Off and the LED Operation must be is lit.
The synoptic diagram, on first UPS unit, must display the status
“LOAD SUPPLIED BY INVERTER”.
6. Insert the inverter by pressing “Inverter ON” ( I ) key on all other UPS units.
Do not start the next inverter until the sequence of the previous one end.
As soon as the output power of the inverters is sufficient to supply the load, the output of the units with
running inverter will transfer to inverter.
LED Alarm turn Off and the LED Operation must be lit.
The synoptic diagram, on all UPS units, must display the status
“LOAD SUPPLIED BY INVERTER”.
END OF PROCEDURE