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8.3.3
Function block
ANSI09000281-1-en.vsd
SAPFRC (81)
V3P*
BLOCK
TRIP
PICKUP
RESTORE
BLKDMAGN
ANSI09000281 V1 EN
Figure 84:
SAPFRC (81) function block
8.3.4
Signals
Table 145:
SAPFRC (81) Input signals
Name
Type
Default
Description
V3P
GROUP
SIGNAL
-
Three phase group signal for voltage inputs
BLOCK
BOOLEAN
0
Block of function
Table 146:
SAPFRC (81) Output signals
Name
Type
Description
TRIP
BOOLEAN
Operate/trip signal for frequency gradient
PICKUP
BOOLEAN
Start/pick-up signal for frequency gradient
RESTORE
BOOLEAN
Restore signal for load restoring purposes
BLKDMAGN
BOOLEAN
Blocking indication due to low magnitude
8.3.5
Settings
Table 147:
SAPFRC (81) Group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
Operation
Disabled
Enabled
-
-
Disabled
Disable/Enable Operation
PUFreqGrad
-10.00 - 10.00
Hz/s
0.01
0.50
Frequency gradient pick up value, the sign
defines direction
tTrip
0.000 - 60.000
s
0.001
0.200
Operate time delay in positive / negative
frequency gradient mode
RestoreFreq
45.00 - 65.00
Hz
0.01
49.90
Restore is enabled if frequency is above set
frequency value
tRestore
0.000 - 60.000
s
0.001
0.000
Restore time delay
Section 8
1MRK 511 287-UUS A
Frequency protection
200
Technical manual
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