This setting is used to control real power based on the frequency excursion
This setting is applicable when Rule21 Standards are selected.
Start Freq: 60.50Hz
WGradient: 040%
Figure 6.37 Freq-Watt (1)
Start Freq: This is the frequency that active power reduction starts.
WGradient: This is the active power reduction rate in terms of the frequency.
Stop Freq: This is the frequency that stops the correction cycle.
Hysteresis: This indicates whether hysteresis is enabled.
f stop
f start
Reduced
Power
f
Wgradient
Hysteresis
Figure 6.38 Freq-Watt (2)
This function is for maintenance personnel only, wrong operation
will prevent the inverter from reaching maximum power.
→
6. Normal operation
6. Normal operation
Mode 08 :
.57.
.56.
Figure 6.34 Power Rate Limit
Power Rate:016%
RateP_Sts-US:STOP
Over frequency load shedding Fstart range 60~62Hz, default setting 60.2Hz
Fstop can set the scope: 61-64Hz, the default setting 62Hz
.
Press the Enter key to select the mode or frequency
.
Press Up
/
Down to set. Press ESC to save the settings.
Figure 6.36 Freq
-
Watt
characteristic
f min
f nom
f start
f max
f stop
100
%
of
Available
Power
0
Grid
Frequency
6.7.8.3 Freq Derate Set
There are 5 derate modes in this menu. When operating under standard UL-1741 limits,
modes 00 to 03 are disabled. Mode 04 is used for UL1741SA frequency derating setting.
Mode 08 is used for RULE21 Freq-watt setting. This sets the f start and f stop point.
Mode 04 :
Figure 6.35 Freq Derate Set
Derate
Mode
:
04
OV
-
F
-
Start
:
60
.
20Hz
6.7.8.2 Power Rate Limit
This function is used for change Power Ramp-up rate. When inverter start up or input string
MPPT changes, inverter power ramp-up rate is limited in this menu.
The default setting is stop
(disable).
The setting range from 10% to 600%, means inverter power change rate per minute.
Values are not allowed to change. If they are set, they may not conform to the UL1741SA
standard
.
This setting is applicable when UL Standards are selected.
