6. Operation
User Manual
43
6.5.8.2 Power Rate Limit
This function is used for changing power ramp up rate.
When the inverter initializes or string MPPT changes, the ramp up rate is limited.
The default setting is stop (disable).
The setting range is from 10% to 600%, This will change the power change rate per
minute. If these values are changed the inverter may not conform to UL 1741 SB or IEEE
1547 standard.
Figure 6.36 Power Rate Limit
Power Rate:016%
RateP_Sts-US:STOP
6.5.8.3 Freq Derate Set
There are five frequency derate modes in this menu when UL-208/240 grid standard is
selected. Modes 00 – 03 are disabled. Mode 04 is used for UL 1741 SB frequency
derating settings. Within this mode the user can set the frequency start and stop points.
The default setting is 00( disabled).
Figure 6.37 Freq Derate Set
Derate Mode:04
OV- F-Start:60.20Hz
This setting is applicable when UL Standards are selected.
Figure 6.38 Freq-Watt characteristic
f min
f nom f start f maxf stop
100% of
Available
Power
0
Grid Frequency
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