Parallel Operation - INFOSEC UPS SYSTEM E4 EVOLUTION II+TT Serie Mode D'emploi

14. Operation of setting the charger numbers
1) This operation is only for professional or qualified technicians.
2) Turn off the UPS. If the load cannot be cut, remove the cover of maintenance bypass switch on the
rear panel and turn the maintenance switch to the "BPS" position first.
3) Switch off the line input breaker and the UPS will enter in "No Output mode".
4) Connect the communication cable from the UPS to the computer. Enter the software to set the
charger numbers carefully.
5) After the settings are updated successfully, shut the UPS down with the batteries connected to save
the change. Then, modify the connected charger numbers.
6) Switch on the line input breaker and the external bypass input breaker. Then, the UPS will enter
in bypass mode. If the UPS is in maintenance bypass mode, turn the maintenance switch to the "UPS"
position and then switch the UPS on.
NOTE: The charger number setting must be the same as the actual number in the UPS. If the setting
number is different than the actual number, the charging current cannot meet the specification.

3-5. Parallel Operation

1. Parallel system initial startup
First of all, make sure all of UPSs have the same configuration.
1) Turn on each UPS to AC mode respectively (Refer to section 3-4(1)). Then, measure the inverter
output voltage of each phase for each UPS with a multimeter. Please calibrate the inverter output
voltage by configuring inverter voltage adjustment (Refer to Program 15, 16 and 17, section 3-7) in
LCD setting until the output voltage difference of each UPS is within 1V. If voltage difference is
less than 1V, it's ok to start parallel operation.
2)
Calibrate the output voltage measurement by configuring output voltage calibration(Refer to
Program 18,19, and 20, section 3-7) in LCD setting to make sure the difference between real
output voltage and detected value of UPS is less than 1V.
3) Turn off each UPS (Refer to section 3-4(7.)). Then, follow the wiring procedure in section 2-4.
4) Remove the cover of parallel share current cable port on the UPS, connect each UPS one by one
with the parallel cable and share current cable, and then screw the cover back.
5) Turn on the parallel system in AC mode:
a) Turn on the line input breaker of each UPS. If using dual-input unit, please also turn on the
external bypass input breaker. After all UPSs enter to bypass mode, measure the output
voltage between two UPSs for the same phase to make sure the phase sequence is correct. If
these two voltage differences are near to zero, that means all connections are correct.
Otherwise, please check if the wirings are connected correctly.
b) Turn on the output breaker of each UPS.
c) Turn on each UPS in turns. After a while, the UPSs will enter to AC mode synchronously and
then, the parallel system is completed.
6) Turn on the parallel system in Battery mode:
a) Turn on the battery breaker (only available in long-run model) and external output breaker of
each UPS.
b) Turn on any UPS. A few seconds later, the UPS will enter to battery mode.
c) Then, turn on another UPS. A few seconds later, the UPS will enter to battery mode and add
to the parallel system.
d) If you have the third UPS, follow the same procedure of c). Then, the parallel system is
complete.
If more detailed information is needed, please contact supplier or service center for parallel
operation instruction.
INFOSEC UPS SYSTEM – 15, rue du Moulin – 44880 Sautron – France – www.infosec-ups.com
84
hotline : +33 (0)2 40 76 15 82 – fax : +33(0)2 40 94 29 51 – hotline@infosec.fr – 07 19 AA 59 205 03