ABB RER620, Technical Manual

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Section 4
1MAC309294-MB F
Protection functions
234 RER620
Technical Manual
4.4.2.7 Settings
Table 247: 81S group settings
Table 248: 81S non-group settings
4.4.2.8 Monitored data
Table 249: 81S monitored data
4.4.2.9 Technical data
Table 250: 81S technical data
Parameter Values (Range) Unit Step Default Description
Load shed mode 1=Freq<
6=Freq< OR df/dt
8=Freq< AND df/dt
1=Freq< Set the operation mode for load shedding function
Restore mode 1=Disabled
2=Auto
3=Manual
1=Disabled Mode of operation of restore functionality
Start value Freq 0.800...1.200 xFn 0.001 0.975 Frequency setting/start value
Start value df/dt -0.200...-0.005 xFn /s 0.005 -0.010 Setting of frequency gradient for df/dt detection
Operate Tm Freq 80...200000 ms 10 200 Time delay to operate for under frequency stage
Operate Tm df/dt 120...200000 ms 10 200 Time delay to operate for df/dt stage
Restore start Val 0.800...1.200 xFn 0.001 0.998 Restore frequency setting value
Restore delay time 80...200000 ms 10 300 Time delay to restore
Parameter Values (Range) Unit Step Default Description
Operation 1=on
5=off
1=on Operation Off / On
Reset delay time 0...60000 ms 1 50 Time delay after which the definite timers will reset
Name Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Start duration
LSHDPFRQ Enum 1=on
2=blocked
3=test
4=test/blocked
5=off
Status
Characteristic Value
Operation accuracy f< ±10 mHz
df/dt ±100 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)
Start time f< < 80 ms
df/dt < 120 ms
Reset time < 150 ms
Operate time accuracy ±1.0% of the set value or ±30 ms