Lapara 10KR User Manual - page 17
16
16
LA-ON31-RACK
NOTE:
JS3 setting on the control board: please shorts the Pin1 & Pin2 for 18 pcs batteries; shorts the Pin3 &
Pin4 19 pcs batteries; and shorts the Pin5 & Pin6 for 20 pcs batteries.
5) Switch on the input breaker and the UPS will enter Bypass mode. If the UPS is in maintenance Bypass
mode, turn the maintenance switch to “UPS” position and then turn on the UPS.
3.5. Parallel Operation
1. Parallel system connection
First of all, please make sure all UPSs are parallel model and have the same configuration.
1) Turn on each UPS to AC mode respectively (Refer to section 3.4. (1). Then, measure the output voltage of
each UPS to check if the voltage difference between actual output and setting value is less than 1.5V
(typical 1V) with multimeter. If the difference is more than 1.5V, please calibrate the voltage by configuring
inverter voltage adjustment (Refer to Program 15, section 3.7.) in LCD setting. If voltage difference
remains more than 1.5V after calibration, please contact your local distributor or service centre for help.
2) Calibrate the output voltage measurement by configuring output voltage calibration (Refer to Program 16,
section 3.7.) in LCD setting to make sure the error 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 with utility power supply (in AC mode)
a) Turn on the input breaker of each UPS. After all UPSs enter to bypass mode, measure the voltage
difference between the output of each UPS with a multimeter. If the voltage difference is less than 1V,
it means all connections are correct. If the difference is more than 1V, recheck 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 installation is complete.
5) Turn on the parallel system without utility power supply (in Battery mode).
a) Turn on the battery breaker (only available in long-run model) and output breaker of each UPS.
NOTE:
1.The output breaker of each UPS should be turned on when turning on the parallel system
without utility power supply. Otherwise, the parallel system cannot be operated.
NOTE:
2.It is not allowed to share one battery pack for long-run UPSs in parallel system. Each UPS
should be connected to its own battery pack.
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 as c). Then the parallel system is complete.
If you need more detailed information, please contact your supplier or service center for parallel
operation instruction.
2. Add one new unit into the parallel system
1) You cannot add one new unit into the parallel system when the whole system is running. You must cut
off the load and shutdown the system.
2) Make sure all the UPS are parallel models and follow the wiring in section 2.4.
3) Install the new parallel system refers to the previous section.