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NXRi-6KL, NXRi-10KL USER MANUAL
UNINTERRUPTIBLE POWER SUPPLY (UPS)
Xtreme Power Conversion® (XPC) Corporation (Rev 2/7/13)
Page 35
3.
Turn on the input breaker of each UPS and measure the voltage difference between the
Output Line 1 of each UPS with multimeter. If the voltage is difference is less than 1V, all
connections are correct. If the difference is larger than 1V, check the wiring is properly
completed.
4.
Turn on the input breakers of all UPS in the parallel systems. Before turning on each UPS,
check PAR001
̴
PAR003 are displayed in each UPS sequentially. If no “PARXXX” exists in any
UPS, check to see if the parallel cables are correctly conntected.
5.
Turn on each UPS in sequence and make sure the AC mode LED or Battery mode LED display
in each UPS. Measure the output voltage of each UPS to check to see that the voltage
difference is less than 2V (typically 1V) with multimeter. If the difference is more than 2V,
check that parallel cables and/or share current cables are connected well. If they are all
connected well, the UPS may have an internal issue. Contact your distributor for further
assisatance.
6.
Turn off each UPS in sequence. After all of the UPS are transferred to Bypass mode, turn on
the output breaker for each unit.
7.
Turn on the UPS in AC mode. Parallel system connections and configuration should now be
complete.
Add one new unit into the Parallel System
1.
You cannot add one new UPS into a Parallel System while the whole system is operating. All
loads must be powered down and each UPS in the system must be powered down before
proceeding.
2.
Make sure all of the UPS are Parallel Models, following Input Wiring Instructions shown
earlier in this manual.
3.
Install the new UPS and follow instructions in the previous section for proper connection,
testing, and startup.
Remove one unit from the Parallel System
There are two methods that can be used to remove one UPS from the parallel system:
Method #1
1.
Press the “OFF” button twice for about 0.5 seconds each. The UPS will enter into bypass
mode without output.
2.
Turn off the output breaker of the UPS, and then turn off the input breaker of the UPS.