UPS for 400 Vac Grid, Installation Guide, doc. rel. 3.0
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11.
Run for 5-10 min.
12.
When you have completed system acceptance testing lower the active and reactive
load levels in 10% increments back down to 0 using the
Active power
slider and
Reactive power
slider.
13.
Transfer the system back to VF mode in order to return the UPS back to normal system
operation.
14.
Disable PQ mode (
System Menu > Setup> System > System type > PQ mode
)
Figure 39: Disable PQ mode
The system is back in full operation and is ready to be used as a UPS.
3.4.2.
Test: Under load
This test is designed for standard load bank testing to verify the operation of UPS
under load.
To perform the test under load:
1.
Turn off all ac and dc CBs and isolate the system.
2.
Connect an average or standard load to the system.
3.
Turn on ac input CBs and measure the ac input voltage during operation under load.
Take the measurements at the output terminals of UPS
(phase-to-phase between L1-L2,
L2-L3, and L3-L1 and phase-to-neutral at L1, L2, and L3).
4.
Check and record the total system load (output current) and make sure that the UPS
is
not overloaded with respect to system specifications.
5.
Verify that UPS
is operating normally and that no alarms or fault indications are present.
