GE Digital Energy SitePro 400 VAC CESeries 7 Operating Manual page 66

For parallel systems perform the following procedure on each unit,
starting from unit no. 1.
1. Switch ON the mains voltage – As for the single version.
2. Check for correct phase rotation – As for the single version.
3. Close the input switch Q4 – As for the single version.
4. Battery coupling to DC link – As for the single version.
Warning: in case of parallel system with rectifiers on common battery, the operation must
be performed within 15 seconds following the blinking lighting of LED 3.
When finished, all the rectifiers are operating and charging the battery.
There is no alarm condition.
Verify on the display screens (metering mode) the right DC voltage of each unit.
5. Close the output switch Q1 on each unit.
When the last Q1 will be closed the output will be supplied by the mains through all the bypass.
The LCD display on each unit must indicate the status "LOAD ON BYPASS".
Now the control panel of each unit should indicate the following situation:
LED "service check" is OFF.
LEDs 1, 2, 3, 4b, 7 and 8 light up.
LEDs 4a, 5, 6 and 9 are OFF.
6. Inverter start.
Press the key "I" on the control panel of the unit no. 1.
The inverter will start up.
LED 5 (inside inverter symbol) must be blinking.
In a short time, as the inverter voltage is confirmed, the LED will stop blinking and the output will
be automatically transferred from mains to inverter.
LED 6 becomes ON and LED 7 turns OFF.
Press the key "I" on the control panel of each other parallel units.
After a few seconds the inverters starts up.
LED 5 initially blinks and becomes lit when the inverters are automatically coupled on the parallel
bus bar.
The LCD panel of each unit must display the main screen, indicating the status.
"LOAD ON INVERTER" and the value of the battery reserve.
LEDs 1, 2, 3, 4b, 5, 6, 8 are ON and LEDs 4a, 7, 9 are OFF on each unit.
7. Load supply.
Your UPS parallel system is now running, supplying power to the output.
Insert the loads one by one to the output of the UPS.
Check on display screen the output current value of L1, L2, L3 and check for correct load balance.
Verify that the load should be equally shared between the parallel units.
NOTE !
The Battery must be charged for at least 10 hours, in order to ensure the full
backup runtime in case of a Mains Failure.
Modifications reserved
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Operatine Manual SitePro 60 kVA