User Manual 10 Operation of LCD Display Panel
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10.14 Special Settings for Italy
If the “Countries” selection is “IT” (Italy), several LCD menus and operation methods
are different from other countries.
The differences focus on “Run-param” and “Pro-param” as shown below.
10.14.1 Over-frequency Derating Setting for Italy
If the “Countries” selection is “IT” (Italy), the “Derating Slope”* will display in the
“Run-param” screen.
When the grid frequency is between 50.3Hz and 51.5Hz, inverter will decrease
power according to the “Derating Slope”.
Default derating slope (Pm/Hz, Pm is the power before derating): 83.33%. Range:
40% ...100%.
Note: “Derating Slope”* is the power derating slope. Power derating slope = 100 /
(Grid frequency × Frequency derating slope). Frequency derating slope range:
2% ...5%.
Fig. 10-5 “IT” Over-frequency Derating Curve
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