Parallel Operation - Phasak PH 9273 Manual De Uso

3.6. Parallel Operation

1. Parallel system initial startup
First of all, please make sure all UPS's are parallel model and have the same configuration.
1) Turn on each UPS to AC mode respectively (Refer to section 3.5.1. Then, measure the inverter output voltage of each
phase for each UPS to check if the inverter 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, 16 and 17, 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 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 3.5.7. Then, follow the wiring procedure in section 2.3.
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 line input breaker of each UPS (for dual input, also turn on bypass input breaker). After all UPSs
enter to bypass mode, measure the voltage difference between two UPS for the same phase to make sure the
phase sequence is correct. If these two voltage differences are near to zero, it means all connections are
correct. Otherwise, please 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 UPS's will enter to AC mode synchronously and then, the
parallel system installation is complete.
6) 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: It is not allowed to share one battery pack for long-run UPS's 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 centre 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 2.3.
3) Install the new parallel system refers to the previous section.
3. Remove one unit from the parallel system
There are two methods to remove one unit from the parallel system:
Method 1:
1) Press the "OFF" key twice and each time should last for more than 0.5s. Then, the UPS will enter into bypass mode or
no output mode without output.
2) Turn off the output breaker of this unit, and then turn off the input breaker of this unit.
3) After it shuts down, you can turn off the battery breaker (for long-run model). Remove the parallel cable and share
current cable. Then, remove the unit from the parallel system.
Segurança e harmonia
ININTERRUPTA
3. Operations
PH 9273 | PH 9293
Uninterruptable Power Supply
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