Records; Fault Reports - GE D30 Instruction Manual

6.4 RECORDS

6.4RECORDS
PATH: ACTUAL VALUES
NO FAULTS TO REPORT
or
6
FAULT REPORT 1
The latest 15 fault reports can be stored. The most recent fault location calculation (when applicable) is displayed in this
menu, along with the date and time stamp of the event which triggered the calculation. See the
SETUP

FAULT REPORTS

COMMANDS CLEAR RECORDS
CLEAR RELAY RECORDS
Fault type determination is required for calculation of fault location – the algorithm uses the angle between the negative and
positive sequence components of the relay currents. To improve accuracy and speed of operation, the fault components of
the currents are used; that is, the pre-fault phasors are subtracted from the measured current phasors. In addition to the
angle relationships, certain extra checks are performed on magnitudes of the negative and zero-sequence currents.
The single-ended fault location method assumes that the fault components of the currents supplied from the local (A) and
remote (B) systems are in phase. The figure below shows an equivalent system for fault location.
The following equations hold true for this equivalent system.
where: m = sought pu distance to fault, Z = positive sequence impedance of the line.
The currents from the local and remote systems can be parted between their fault (F) and pre-fault load (pre) components:
6-18
RECORDS FAULT REPORTS
FAULT 1
LINE ID: SRC 1
FAULT 1
MESSAGE
2000/08/11
FAULT 1
MESSAGE
00:00:00.000000
FAULT 1
MESSAGE
ABG
FAULT 1
MESSAGE
00.0 km
FAULT 1
MESSAGE
SHOT: 0
menu for assigning the source and trigger for fault calculations. Refer to the
FAULT REPORT 1
menu for manual clearing of the fault reports and to the
menu for automated clearing of the fault reports.
distance to fault
Local bus
Z mZ
I
A
A
E
A
V
A
Figure 6–4: EQUIVALENT SYSTEM FOR FAULT LOCATION
⋅
V m Z I
=
A
I
A
D30 Line Distance Relay
FAULT REPORT 1(15)
Range: SRC 1, SRC 2
Range: YYYY/MM/DD
DATE:
Range: HH:MM:SS.ssssss
TIME:
Range: not available if the source VTs are in the "Delta"
TYPE:
configuration
Range: not available if the source VTs are in the "Delta"
LOCATION
configuration
Range: where applicable
RECLOSE
Remote
bus
(1-m)Z
I
B
V R
F F
V
B
⋅ ⋅ ( )
R I I
+ +
A F A B
I I
= +
AF Apre
6 ACTUAL VALUES
6.4.1 FAULT REPORTS
SETTINGS
SETTINGS PRODUCT SETUP
Z
B
E
B
842780A1.CDR
GE Multilin
PRODUCT
(EQ 6.1)
(EQ 6.2)