4.6.1.6 Signals
Table 664: FRPFRQ Input signals
Name Type Default Description
F SIGNAL 0 Measured frequency
dF/dt SIGNAL 0 Rate of change of fre-
quency
BLOCK BOOLEAN 0=False Block signal for acti-
vating the blocking
mode
Table 665: FRPFRQ Output signals
Name Type Description
OPERATE BOOLEAN Operate
OPR_OFRQ BOOLEAN Operate signal for overfre-
quency
OPR_UFRQ BOOLEAN Operate signal for underfre-
quency
OPR_FRG BOOLEAN Operate signal for frequency
gradient
START BOOLEAN Start
ST_OFRQ BOOLEAN Start signal for overfrequen-
cy
ST_UFRQ BOOLEAN Start signal for underfre-
quency
ST_FRG BOOLEAN Start signal for frequency
gradient
4.6.1.7 Settings
Table 666: FRPFRQ Group settings (Basic)
Parameter
Values (Range) Unit Step Default Description
Operation mode
1=Freq<
2=Freq>
3=df/dt
4=Freq< + df/dt
5=Freq> + df/dt
6=Freq< OR df/dt
7=Freq> OR df/dt
1=Freq< Frequency protec-
tion operation
mode selection
Start value Freq> 0.9000...1.2000 xFn 0.0001 1.0500 Frequency start val-
ue overfrequency
Start value Freq< 0.8000...1.1000 xFn 0.0001 0.9500 Frequency start val-
ue underfrequency
Start value df/dt -0.2000...0.2000 xFn /s 0.0025 0.0100 Frequency start val-
ue rate of change
Table continues on the next page
1MRS757644 H Protection functions
620 series
Technical Manual
707
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