ABB RELION 620 Series Technical Manual page 712

Section 4
Protection functions
Parameter
Start value df/dt
Operate Tm Freq
Operate Tm df/dt
Table 667: FRPFRQ Non group settings (Basic)
Parameter
Operation
Table 668: FRPFRQ Non group settings (Advanced)
Parameter
Reset delay Tm Freq
Reset delay Tm df/dt
4.6.1.8
4.6.1.9
706
Values (Range) Unit
-0.2000...0.2000 xFn /s
80...200000 ms
120...200000 ms
Values (Range) Unit
1=on
5=off
Values (Range) Unit
0...60000 ms
0...60000 ms
Monitored data
Table 669: FRPFRQ Monitored data
Name
START_DUR
ST_DUR_OFRQ
ST_DUR_UFRQ
ST_DUR_FRG
FRPFRQ
Technical data
Table 670: FRPFRQ Technical data
Characteristic
Operation accuracy
Start time
Reset time
Operate time accuracy
Step Default
0.0025 0.0100
10 200
10 400
Step Default
1=on
Step Default
1 0
1 0
Type Values (Range)
FLOAT32 0.00...100.00
FLOAT32 0.00...100.00
FLOAT32 0.00...100.00
FLOAT32 0.00...100.00
Enum 1=on
2=blocked
3=test
4=test/blocked
5=off
Value
f>/f< ±5 mHz
df/dt ±50 mHz/s (in range |df/dt| <5 Hz/s)
±2.0% of the set value (in range 5 Hz/s < |df/dt| <
15 Hz/s)
f>/f< <80 ms
df/dt <120 ms
<150 ms
±1.0% of the set value or ±30 ms
1MRS757644 F
Description
Frequency start value rate of change
Operate delay time for frequency
Operate delay time for frequency rate of
change
Description
Operation Off / On
Description
Reset delay time for frequency
Reset delay time for rate of change
Unit Description
% Start duration
% Start duration
% Start duration
% Start duration
Status
Technical Manual
620 series