ABB RELION REX640 Technical Manual page 939

1MRS759142 F
Parameter Values (Range)
8=Freq< AND df/dt
Restore mode
1=Disabled
2=Auto
3=Manual
Start value Freq 0.8000...1.2000
Start value df/dt -0.2000...-0.0050
Operate Tm Freq 80...200000
Operate Tm df/dt 120...200000
Restore start Val 0.8000...1.2000
Restore delay time 80...200000
Table 899: LSHDPFRQ Non group settings (Basic)
Parameter Values (Range)
Operation
1=on
5=off
Table 900: LSHDPFRQ Non group settings (Advanced)
Parameter Values (Range)
Reset delay time 0...60000
4.6.2.9 LSHDPFRQ Monitored data
Table 901: LSHDPFRQ Monitored data
Name Type
START_DUR FLOAT32
LSHDPFRQ Enum
4.6.2.10 Technical data
Table 902: LSHDPFRQ Technical data
Characteristic
Operation accuracy
Table continues on the next page
REX640
Technical Manual
Unit Step
xFn 0.0001
xFn/s 0.0001
ms 10
ms 10
xFn 0.0001
ms 10
Unit Step
Unit Step
ms 1
Values (Range)
0.00...100.00
1=on
2=blocked
3=test
4=test/blocked
5=off
f<
df/dt
Protection functions
Default
1=Disabled
0.9750
-0.0100
200
200
0.9980
300
Default
1=on
Default
50
Unit Description
% Start duration
Status
Value
±5 mHz
±100 mHz/s (in range |df/dt| < 5 Hz/s)
Description
Mode of operation
of restore function-
ality
Frequency set-
ting/start value
Setting of frequen-
cy gradient for
df/dt detection
Time delay to op-
erate for under fre-
quency stage
Time delay to oper-
ate for df/dt stage
Restore frequency
setting value
Time delay to re-
store
Description
Operation Off / On
Description
Time delay after
which the definite
timers will reset
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