ABB RELION REX640 Technical Manual page 1220

Protection related functions
Table 1162: SCEFRFLO Non group settings (Advanced)
Parameter Values (Range)
EF algorithm Sel
1=Load compensa-
tion
2=Load modelling
EF algorithm Cur
1=Io based
Sel
2=I2 based
Load Com PP loops 0=Disabled
1=Enabled
Enable simple mod-
0=Disabled
el
1=Enabled
Time delay 0...3000
Zero Ris Curr 0.005...1.000
change
Distance estimate 0.001...0.300
Va
5.7.10 SCEFRFLO Monitored data
Table 1163: SCEFRFLO Monitored data
Name Type
RF FLOAT32
FAULT_LOOP Enum
FLT_DISTANCE FLOAT32
FLT_DIST_Q INT32
RFLOOP FLOAT32
XFLOOP FLOAT32
XFPHASE FLOAT32
IFLT_PER_ILD FLOAT32
S_CALC FLOAT32
XC0F_CALC FLOAT32
SCEFRFLO Enum
Table continues on the next page
1220
Unit Step
ms 10
xIn 0.001
0.001
Values (Range)
0.00...3000.00
1=AG Fault
2=BG Fault
3=CG Fault
4=AB Fault
5=BC Fault
6=CA Fault
7=ABC Fault
-5=No fault
0.00...3000.00
0...511
0.00...3000.00
0.00...3000.00
0.00...3000.00
0.00...60000.00
0.00...1.00
0.00...3000.00
1=on
Default
1=Load compensa-
tion
1=Io based
1=Enabled
0=Disabled
100
0.010
0.015
Unit Description
ohm Fault point resistance in
primary ohms
Fault impedance loop
pu Fault distance in units
selected by the user
Fault distance quality
ohm Fault loop resistance in
primary ohms
ohm Fault loop reactance in
primary ohms
ohm Positive sequence fault
reactance in primary
ohms
Fault to load current ra-
tio
Estimated equivalent
load distance
ohm Estimated PhE capaci-
tive reactance of line
Status
1MRS759142 F
Description
Selection for PhE-
loop calculation al-
gorithm
Selection for earth-
fault current model
Enable load com-
pensation for
PP/3P-loops
Enable calc. with-
out impedance set-
tings for PP/3P-
loops
Time delay to start
calculation in com-
pensated networks
Change in meas-
ured resistive com-
ponent current due
to fault
Allowed variation
of short circuit dis-
tance estimate
REX640
Technical Manual