Micom P631 - 3.19 Fault Data Acquisition (Function Group FT_DA)

3.19 Fault Data Acquisition (Function Group FT_DA)
When there is a primary system fault, the P631 collects the following measured
fault data:
●
Running time
●
Fault duration
●
Fault current (short-circuit current)
●
Fault voltage (short-circuit voltage)
●
Fault impedance (short-circuit impedance)
●
Fault reactance (short-circuit reactance) in percent of the line reactance
and in Ω
●
Line fault loop angle
●
Fault distance
●
Ground fault (short-circuit) current
●
Ground fault loop angle
●
Relative fault location
●
Fault location in km
3.19.1 Running Time and Fault Duration
The running time is defined as the time between the start and end of the general
starting signal, and the fault duration is defined as the time between the start
and end of the FT_RC: Record. in progress signal.
49Z64DMA
≥1
R
+
FT_DA:
Running time
[ 004 021 ]
R
+
FT_DA:
Fault duration
[ 008 010 ]
MAIN:
General reset USER
[ 003 002 ]
1: execute
MAIN:
Reset LED
306 020
≥1
MAIN:
General reset EXT
[ 005 255 ]
≥1
FT_RC:
Record. in progress
[ 035 000 ]
MAIN:
General starting
[ 036 000 ]
! G !
! G !
Fig. 3-70: Running time and fault duration.
3.19.2 Fault Data Acquisition Time
The P631 determines the measured fault data for a particular point in time
during a fault. Depending on the protection function that recognizes a fault, the
criterion for the determination of the recording start time is selected by the P631.
If, for example, the differential protection function detects a fault then the P631
determines the measured fault data at the time during the fault when the
maximum differential current was measured. The measured fault data are
P631
3 Operation
3-100 P631/EN M/R-11-C // P631-310-650