ABB Relion 670 Series Applications Manual page 475

1MRK 511 401-UUS F
LMBRFLO function indicates the distance to fault as a percentage of the line length, in kilometers
or miles as selected on the local HMI.
either, in
with a high accuracy, is stored together with the recorded disturbances. This information can be
read on the local HMI, uploaded to PCM600 and is available on the station bus according to IEC
61850–8–1.
The distance to fault can be recalculated on the local HMI by using the measuring algorithm for
different fault loops or for changed system parameters.
17.8.3 Setting guidelines
The parameters for the Fault locator function are set via the local HMI or PCM600.
The Fault locator algorithm uses phase voltages, phase currents and residual current in observed
bay (protected line) and residual current from a parallel bay (line, which is mutual coupled to
protected line).
The Fault locator has close connection to the Disturbance report function. All external analog
inputs (channel 1-30), connected to the Disturbance report function, are available to the Fault
locator and the function uses information calculated by the Trip value recorder. After allocation of
analog inputs to the Disturbance report function, the user has to point out which analog inputs to
be used by the Fault locator. According to the default settings the first four analog inputs are
currents and next three are voltages in the observed bay (no parallel line expected since chosen
input is set to zero). Use the Parameter Setting tool within PCM600 for changing analog
configuration.
The measured phase voltages can be fine tuned with the parameters
to further increase the accuracy of the fault locator.
The list of parameters explains the meaning of the abbreviations. Figure
system parameters graphically. Note, that all impedance values relate to their primary values and
to the total length of the protected line.
ANSI05000045 V2 EN-US
Figure 218: Simplified network configuration with network data, required for settings of the
For a single-circuit line (no parallel line), the figures for mutual zero-sequence impedance (X
R ) and analog input are set at zero.
0M
Power system specific parameter settings are not general settings but specific setting included in
the setting groups, that is, this makes it possible to change conditions for the Fault locator with
short notice by changing setting group.
Bay control REC670
Application manual
kilometer or miles for the distance to fault. The distance to the fault, which is calculated
R
0L
R
1L
R +jX
1A 1A
Z =Z
0m 0m
R +jX
0L
R +jX
1L
DRPRDRE
LMBRFLO
fault location-measuring function
© Copyright 2017 ABB. All rights reserved
LineLengthUnit setting is used to select the unit of length
+jX
0L
+jX
1L
R +jX
1B 1B
+jX
0m
0L
1L
ANSI05000045_2_en.vsd
Section 17
Monitoring
VAGain , VBGain and VCGain
218 also presents these
0M
IP14835-1 v1
M13769-3 v6
,
469