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6.4
Auto Test according to DK 5940
During mains operation, the Auto Test procedure according to DK 5940 (only for coun-
try setting “Italy”) varies the trigger threshold for AC voltage and frequency monitoring
linearly with a ramp of ≤ 0.05Hz/s and/or ≤ 0.05Vn/s (Vn = 230Vac). This way, at some
point during the test, the threshold will coincide with the current measured value, leading
to triggering of the monitoring intervention. After each test step the values of the trig-
ger thresholds, delay times, current measured frequency and AC voltage values, and the
standard threshold trigger value are displayed.
6.4.1 Start Auto Test
The Auto Test can be activated only if there is sufficient irradiance, the inverter is con-
nected to the grid, and is in feed mode.
1. Wait until the inverter has connected to the grid.
2. Select the “Auto Test” menu item in the Main menu.
3. Answer the question whether the Auto Test should be executed with YES.
4. The Auto Test now runs automatically.
NOTE
If an error occurs during the test or the irradiance is too low, the Auto Test is aborted
and the message “Auto Test aborted” appears in the display together with an associ-
ated error message.
6.4.2 Procedure
Maximum voltage
1. The set voltage monitoring threshold Vac max is displayed.
2. The threshold value is decremented linearly until it reaches the current mains voltage
value and grid monitoring is triggered.
3. The trigger value, the trigger time, the current value, and the default value of voltage
monitoring (Vac max) are displayed.
Minimum voltage
1. The set voltage monitoring threshold Vac min is displayed.
2. The threshold value is incremented linearly until it reaches the current mains voltage
value and grid monitoring is triggered.
Summary of Contents for 10MT2
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