GE Industrial Solutions SG Series 400 & 500 Operating Manual - Manual (Page 64)

Modifications reserved Page 64/79
OPM_SGS_USM_M40_M50_2US_V010.doc User Manual SG Series 400 & 500 UL S2
4. Repeat the procedures 2 and 3 for each other Unit.
• The Rectifiers will start automatically and at the closure of UPS output switch Q1 of the last Unit, the
output will be supplied parallel from Automatic Bypass and Manual Bypass Q2 of all UPS units.
• LED 8 (Automatic Bypass ON) and LED 9 (Manual Bypass Q2 ON) are lit.
Synoptic Diagram of first unit Synoptic Diagram of other units
5. Open the Manual Bypass Switch Q2 (Pos. O) on all Units.
• The Load is supplied by the Utility through the Automatic Bypass of all Units.
• LED 8 (Automatic Bypass ON) is lit and LED 9 (Manual Bypass Q2 ON) turns OFF.
The Synoptic Diagram, on all UPS units, must display the status “LOAD SUPPLIED BY AUTOMATIC BYPASS”.
Synoptic Diagram of first unit Synoptic Diagram of other units
6. Insert the Inverter by pressing the “Inverter ON” ( I ) key on first unit.
• Soft-start of Inverter, indicated with blinking LED 5 (Inverter available).
• At the end of Soft-start the LED 5 (Inverter available) remains lit.
• In case of sufficient output power, the output will transfer to Inverter.
Synoptic Diagram of first unit Synoptic Diagram of other units
7. Insert the Inverter by pressing the “Inverter ON” ( I ) key on all other units.
Do not start the next Inverter until the sequence of the previous one ends.
• Soft-start of Inverter, indicated with blinking LED 5 (Inverter available).
• At the end of Soft-start the LED 5 (Inverter available) remains lit.
• 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”.
Synoptic Diagram of first unit Synoptic Diagram of other units
END OF PROCEDURE