ABB REC650 ANSI User Manual

Table 405: 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
12.14 Fault locator LMBRFLO
12.14.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Fault locator LMBRFLO - -
12.14.2 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 in kilometers or miles as selected by parameter setting.
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.
The compensation includes setting of the remote and local sources and calculation of the
distribution of fault currents from each side. This distribution of fault current, together
Section 12 1MRK 511 287-UUS A
Monitoring
506
Technical manual

ABB REC650 ANSI Specifications

General

Brand	ABB
Model	REC650 ANSI
Category	Controller
Language	English