Function Block - ABB REC650 ANSI Technical Manual

1MRK 511 287-UUS A
12.14.3
12.14.4
Technical manual
with recorded load (pre-fault) currents, is used to exactly calculate the fault position. The
fault can be recalculated with new source data at the actual fault to further increase the
accuracy.
Especially on heavily loaded long lines, where the source voltage angles can be up to
35-40 degrees apart, the accuracy can be still maintained with the advanced compensation
included in fault locator.

Function block

LMBRFLO
PHSEL_A* CALCMADE
PHSEL_B* FLTDISTX
PHSEL_C* BCD_80
CALCDIST* BCD_40
BCD_20
BCD_10
BCD_8
BCD_4
BCD_2
BCD_1
ANSI09000621-2-en.vsd
ANSI09000621 V2 EN
Figure 223: LMBRFLO function block
Signals
Table 406: LMBRFLO Input signals
Name Type
PHSEL_A BOOLEAN
PHSEL_B BOOLEAN
PHSEL_C BOOLEAN
CALCDIST BOOLEAN
Table 407: LMBRFLO Output signals
Name Type
CALCMADE BOOLEAN
FLT_X REAL
BCD_80 BOOLEAN
BCD_40 BOOLEAN
BCD_20 BOOLEAN
BCD_10 BOOLEAN
Table continues on next page
Default Description
0 Phase selection phase A
0 Phase selection phase B
0 Phase selection phase C
0 Input signal to initiate fault distance calculation
Description
Fault calculation made
Reactive distance to fault
Distance in binary coded data, bit represents 80%
Distance in binary coded data, bit represents 40%
Distance in binary coded data, bit represents 20%
Distance in binary coded data, bit represents 10%
Section 12
Monitoring
507