Fault Locator Lmbrflo - ABB REB650 Technical Manual

1MRK 505 277-UUS C
12.13
12.13.1
12.13.2
Technical Manual
Table 242: Input integer value converted to binary output signals
Measured supervised below low-low
value is: limit
Output:
LOWLOW High
LOW
NORMAL
HIGH
HIGHHIGH

Fault locator LMBRFLO

Identification
Function description
Fault locator
Functionality
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
great accuracy. It indicates the distance to fault as a percentage of the line length, in
kilometers or miles as selected on the local HMI.
The fault locator LMBRFLO function, supports kilometer and mile for
the line length unit. The fault distance will be presented with the same
unit as the line length and is mapped to IEC61850 -8-1 communication
protocol, where the fault distance is supposed to be in kilometer (km).
Select the line length unit to kilometer for compliance with IEC61850.
The accurate fault locator is an essential component to minimize the outages after a
persistent fault and/or to pin-point a weak spot on the line.
The fault locator is an impedance measuring function giving the distance to the fault as
a relative (in%) or an absolute value. The main advantage is the high accuracy
achieved by compensating for load current and for the mutual zero-sequence effect on
double circuit lines.
between low‐ between low
low and low and high limit
limit
High
High
IEC 61850 IEC 60617
identification identification
LMBRFLO -
Section 12
Monitoring
between high- above high-high
high and high limit
limit
High
High
ANSI/IEEE C37.2
device number
-
299