Table 242: Input integer value converted to binary output signals
Measured supervised
value is:
below low-low
limit
between low‐
low and low
limit
between low
and high limit
between high-
high and high
limit
above high-high
limit
Output:
LOWLOW High
LOW High
NORMAL High
HIGH High
HIGHHIGH High
12.13 Fault locator LMBRFLO
12.13.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Fault locator LMBRFLO - -
12.13.2 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.
1MRK 505 277-UUS C Section 12
Monitoring
299
Technical Manual
To Next Page
Loading...
