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Name
Values (Range)
Unit
Step
Default
Description
DrepChNoV_A
1 - 30
Ch
1
5
Recorder Input number recording phase
voltage, VA
DrepChNoV_B
1 - 30
Ch
1
6
Recorder Input number recording phase
voltage, VB
DrepChNoV_C
1 - 30
Ch
1
7
Recorder Input number recording phase
voltage, VC
12.14.6
Monitored data
Table 410:
LMBRFLO Monitored data
Name
Type
Values (Range)
Unit
Description
FLT_REL
REAL
-
-
Distance to fault, relative
FLT_DIST
REAL
-
-
Distance to fault in line length
unit
FLT_X
REAL
-
Ohm
Reactive distance to fault
FLT_R
REAL
-
Ohm
Resistive distance to fault
FLT_LOOP
INTEGER
0=---
1=L1-N
2=L2-N
3=L3-N
4=L1-L2
5=L2-L3
6=L3-L1
7=L1-L2-L3
-
Fault loop
12.14.7
Operation principle
The Fault locator (LMBRFLO) in the IED is an essential complement to other monitoring
functions, since it measures and indicates the distance to the fault with high accuracy.
When calculating distance to fault, pre-fault and fault phasors of currents and voltages are
selected from the Trip value recorder data, thus the analog signals used by the fault locator
must be among those connected to the disturbance report function. The analog
configuration (channel selection) is performed using the parameter setting tool within
PCM600.
The calculation algorithm considers the effect of load currents, double-end infeed and
additional fault resistance.
1MRK 511 287-UUS A
Section 12
Monitoring
509
Technical manual
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