78
100
P(%)
GridOFDerat1
DeratRatio(=
Δ P/ Δ f)
Freq(Hz)
51.5
Figure 5-19 Over-frequency derating curve (VDE-4105)
Remarks: Under CEI 0-21 grid standard, it shows
”GridOFDerat2(Hz)” as
the third parameter, the setting range is (50.00, 51.50), and the default value is
51.50.
When the grid standard is CEI 0-21, the setting range of trip frequency of
over-frequency derating is (50.00Hz
，
51.50Hz), and the default value is
50.30Hz. The range of over-frequency derating end frequency is (50.00Hz
，
51.50Hz), and the default value is 51.50Hz.
100
P(%)
GridOFDerat1
GridOFDerat2
Freq(Hz)
Figure 5-20 Over-frequency derating curve (CEI 0-21)
(4)
”5 LVRTSet” menu: set up the parameters of LVRT.
