SMA SB 3300 Installation - Manual (Page 42)

Commissioning SMA Solar Technology AG
42 SB33_38-IEN111851 Installation Guide
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
shutdown 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.
After the inverter has carried out the 4 tests, it switches to "MPP operation" 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 section 6.2.1 ”Starting
the Self-Test by Tapping” (page 38). The inverter starts again the test sequence, as described in
section 6.2.2 ”Completion of the Self-Test” (page 38).