ABB / Fault locator (LMBRFLO) _ Setting & highlights _ AB2155

Overview

The “Fault locator” is an impedance measuring function giving the distance to the fault in km, miles or % of line length. The main advantage is the high accuracy achieved by compensating for load current and for the mutual zero-sequence effect on double circuit lines.

For more detailed information on “Fault locator” function, refer to ABB, Relion 670 Series manuals.

To see other supported functions, click here.

Function Identification

Function description	IEC 61850 identification	IEC 60617 identification	ANSI/IEEE C37.2 device number
Fault locator	LMBRFLO	–	–

Signals & Setting Parameters

LMBRFLO function block

LMBRFLO Input signals

LMBRFLO Input signals
Name	Type	Description
PHSELL1	BOOLEAN	0	Phase selecton L1
PHSELL2	BOOLEAN	0	Phase selecton L2
PHSELL3	BOOLEAN	0	Phase selecton L3
CALCDIST	BOOLEAN	0	Do calculate fault distance (release)

LMBRFLO Output signals

LMBRFLO Output signals
Name	Type	Description
CALCMADE	BOOLEAN	Fault calculation made
FLT_X	REAL	Reactive distance to fault
BCD_80	BOOLEAN	Distance in binary coded data, bit represents 80%
BCD_40	BOOLEAN	Distance in binary coded data, bit represents 40%
BCD_20	BOOLEAN	Distance in binary coded data, bit represents 20%
BCD_10	BOOLEAN	Distance in binary coded data, bit represents 10%
BCD_8	BOOLEAN	Distance in binary coded data, bit represents 8%
BCD_4	BOOLEAN	Distance in binary coded data, bit represents 4%
BCD_2	BOOLEAN	Distance in binary coded data, bit represents 2%
BCD_1	BOOLEAN	Distance in binary coded data, bit represents 1%

LMBRFLO Group settings (basic)

LMBRFLO Group settings (basic)
Name	Values (Range)	Unit	Step	Default	Description
R1A	0.001 – 1500.000	Ohm/p	0.001	2.000	Source resistance A (near end)
X1A	0.001 – 1500.000	Ohm/p	0.001	12.000	Source reactance A (near end)
R1B	0.001 – 1500.000	Ohm/p	0.001	2.000	Source resistance B (far end)
X1B	0.001 – 1500.000	Ohm/p	0.001	12.000	Source reactance B (far end)
R1L	0.001 – 1500.000	Ohm/p	0.001	2.000	Positive sequence line resistance
X1L	0.001 – 1500.000	Ohm/p	0.001	12.500	Positive sequence line reactance
R0L	0.001 – 1500.000	Ohm/p	0.001	8.750	Zero sequence line resistance
X0L	0.001 – 1500.000	Ohm/p	0.001	50.000	Zero sequence line reactance
R0M	0.000 – 1500.000	Ohm/p	0.001	0.000	Zero sequence mutual resistance
X0M	0.000 – 1500.000	Ohm/p	0.001	0.000	Zero sequence mutual reactance
LineLengthUnit	kilometer miles	–	–	kilometer	Line length unit
LineLength	0.0 – 10000.0	–	0.1	40.0	Length of line

LMBRFLO Non group settings (basic)

LMBRFLO Non group settings (basic)
Name	Values (Range)	Unit	Step	Default	Description
DrepChNoIL1	1 – 30	Ch	1	1	Recorder input number recording phase current, IL1
DrepChNoIL2	1 – 30	Ch	1	2	Recorder input number recording phase current, IL2
DrepChNoIL3	1 – 30	Ch	1	3	Recorder input number recording phase current, IL3
DrepChNoIN	0 – 30	Ch	1	4	Recorder input number recording residual current, IN
DrepChNoIP	0 – 30	Ch	1	0	Recorder input number recording 3I0 on parallel line
DrepChNoUL1	1 – 30	Ch	1	5	Recorder input number recording phase voltage, UL1
DrepChNoUL2	1 – 30	Ch	1	6	Recorder input number recording phase voltage, UL2
DrepChNoUL3	1 – 30	Ch	1	7	Recorder input number recording phase voltage, UL3
UL1Gain	0.000 – 10.000	–	0.001	1.000	Scale factor for fine tuning of voltage magnitude L1
UL2Gain	0.000 – 10.000	–	0.001	1.000	Scale factor for fine tuning of voltage magnitude L2
UL3Gain	0.000 – 10.000	–	0.001	1.000	Scale factor for fine tuning of voltage magnitude L3

LMBRFLO Monitored data

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	1=L1-N 2=L2-N 3=L3-N 4=L1-L2 5=L2-L3 6=L3-L1 7=Others	–	Fault loop