ABB REC650 ANSI, Technical Manual

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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.
12.14.3 Function block
ANSI09000621-2-en.vsd
LMBRFLO
PHSEL_A*
PHSEL_B*
PHSEL_C*
CALCDIST* CALCMADE
FLTDISTX
BCD_80
BCD_40
BCD_20
BCD_10
BCD_8
BCD_4
BCD_2
BCD_1
ANSI09000621 V2 EN
Figure 223: LMBRFLO function block
12.14.4 Signals
Table 406: LMBRFLO Input signals
Name Type Default Description
PHSEL_A BOOLEAN 0 Phase selection phase A
PHSEL_B BOOLEAN 0 Phase selection phase B
PHSEL_C BOOLEAN 0 Phase selection phase C
CALCDIST BOOLEAN 0 Input signal to initiate fault distance calculation
Table 407: 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%
Table continues on next page
1MRK 511 287-UUS A
Section 12
Monitoring
507
Technical manual