GE Industrial Solutions SG Series 750 T12 UL S2 User Manual - Manual (Page 57)

Modifications reserved Page 57/71
OPM_SGS_USM_M75_M75_2US_V010.doc User Manual SG Series 750 UL S2 & SG Series 750 T12 UL S2
2. Close the UPS Output Switch Q1 (Pos. I) on all UPS units.
The load is supplied by the utility through the automatic
bypass.
The Synoptic Diagram must display the status “LOAD
SUPPLIED BY AUTOMATIC BYPASS”.
Input Circuit Breaker CB4 closes automatically.
LED 3 (rectifier ON) must blink.
The rectifier starts up automatically, supplying the DC circuit, and charging the DC capacitors.
The LED 3 (rectifier ON) stops blinking and stays ON, indicating that the DC link has reached the floating
voltage.
3. Connect the Battery on all UPS units by closing (Pos. I) the Battery Circuit Breaker.
Attention: to check the right DC polarities on both side of the switch/fuse holder!
LED 4b (Charging Battery) should be lit indicating battery charge.
ATTENTION !
Before performing this operation, the LED 3 (Rectifier ON) must remain lit, thus
indicating that the DC-Link has reached floating voltage (540Vdc)!
4. Insert the Inverter by pressing the “Inverter ON” ( I ) key on first UPS unit.
The Inverter will start up. LED 5 (Inverter available) must be blinking
In a short time, when the Inverter voltage is confirmed, the LED 5 (Inverter available) will stop blinking and stay
fixed lit.
The Load will be automatically transferred from Utility to Inverter if the Inverter power is sufficient to supply
the Load.
The Synoptic Diagram, on first UPS unit, must display the
status “LOAD SUPPLIED BY INVERTER”.
5. Insert the Inverter by pressing the “Inverter ON” ( I ) key on all other UPS units.
Do not start the next Inverter until the sequence of the previous ends.
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”.
6. Load supply.
SG Series 750 or SG Series 750 T12 Parallel System is now running, supplying power to the output.
Insert the loads one by one to the output of the UPS.
Check the output current value of L1, L2 and L3 and check for correct load balance.
7. Operation mode selection.
SG Series 750 or SG Series 750 T12 is delivered normally selected for permanent VFI operation.
eBoost™ Operation Mode can be enabled if available, and the eBoost START time & eBoost STOP time can
be programmed for each day of the week (see Section 6.4 SETUP / eBoost).
END OF PROCEDURE
NOTE !
The Battery must be charged for at least 10 hours, in order to ensure the full backup
runtime in case of a Utility Failure.