### 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 |