SMA WINDY BOY 3300 - Page 41

SMA Solar Technology AG Commissioning
Installation Guide WB33_38-IEN101830 41
Minimum Frequency
In the last step, the inverter tests the minimum frequency.
During the test sequence, the frequency limit applied is
shown in the display of the inverter.
The frequency limit is increased successively until the
disconnection threshold is reached and the inverter
disconnects from the grid.
Once the inverter has disconnected from the grid, the display successively shows the following values
one after the other:
•Disconnection value,
•Calibration value,
•Reaction time,
• Present grid frequency.
When the inverter has carried out the 4 tests, it switches to "Turbine" mode. The original calibration
values are then re-set and the inverter automatically connects to the grid. If you would like to carry out
the test again, you must disconnect the inverter, i.e. disconnect it on the AC and DC sides and then
later re-activate it. You can then restart the self-test as described in the section 6.2.1”Starting the Self-
Test by Tapping” (page37). The inverter begins the test sequence again, as described in section
6.2.2”Completion of the Self-Test” (page37).