Commissioning
SMA Solar Technology AG
42
WB33-38-IA-IEN120940
Installation Manual
6.3.2 Completion of the Self-test
Note the values which are displayed during the self-test. These values must be entered in a test report.
The test results of the individual tests are displayed three times in succession. Each display message
appears for 10 seconds.
During the self-test, the upper and lower disconnection thresholds for each protective function are
subject to linear adjustment with a modification of 0.05 Hz/s and 0.05 Vn/s for the frequency and
voltage monitoring. As soon as the actual measured value exceeds the permitted range (adjusted
disconnection threshold), the inverter disconnects from the electricity grid. In this way, the inverter
determines the reaction time and the self-test is performed.
Overvoltage test
The inverter begins with the overvoltage test. During the
test sequence, the voltage limit applied is shown in the
display of the inverter.
The voltage is reduced step by step until the
disconnection threshold is reached and the inverter
disconnects from the electricity grid.
Once the inverter has disconnected from the electricity grid, the display alternates between the
following values:
• Disconnection value,
• Calibration value,
• Reaction time,
• Current line voltage.
