GE c60 Instruction Manual page 213

CHAPTER 5: SETTINGS
The fault report stores data, in non-volatile memory, pertinent to an event when triggered. The captured data contained in
the FaultReport.txt file includes:
• Fault report number
• Name of the relay, programmed by the user
• Firmware revision of the relay
• Date and time of trigger
• Name of trigger (specific operand)
• Line or feeder ID via the name of a configured signal source
• Active setting group at the time of trigger
• Pre-fault current and voltage phasors (two cycles before either a 50DD disturbance associated with fault report
source or the trigger operate). Once a disturbance is detected, pre-fault phasors hold for three seconds waiting for the
fault report trigger. If trigger does not occur within this time, the values are cleared to prepare for the next disturbance.
• Fault current and voltage phasors (one cycle after the trigger)
• Elements operated at the time of triggering
• Events — Nine before trigger and seven after trigger (only available via the relay web page)
• Fault duration times for each breaker (created by the breaker arcing current feature)
The captured data also includes the fault type and the distance to the fault location, as well as the reclose shot number
(when applicable). To include fault duration times in the fault report, enable and configure the breaker arcing current
feature for each of the breakers. Fault duration is reported on a per-phase basis.
The relay allows locating faults, including ground faults, from delta-connected VTs. In this case, the missing zero-sequence
voltage is substituted either by the externally provided neutral voltage (broken delta VT) connected to the auxiliary voltage
channel of a VT bank, or by the zero-sequence voltage approximated as a voltage drop developed by the zero-sequence
current, and user-provided zero-sequence equivalent impedance of the system behind the relay.
The trigger can be any FlexLogic operand, but in most applications it is expected to be the same operand, usually a virtual
output, that is used to drive an output relay to trip a breaker. To prevent the overwriting of fault events, do not use the
disturbance detector to trigger a fault report. A FAULT RPT TRIG event is automatically created when the report is triggered.
If a number of protection elements are ORed to create a fault report trigger, the first operation of any element causing the
OR gate output to become high triggers a fault report. However, If other elements operate during the fault and the first
operated element has not been reset (the OR gate output is still high), the fault report is not triggered again. Considering
the reset time of protection elements, there is very little chance that a fault report can be triggered twice in this manner. As
the fault report must capture a usable amount of pre and post-fault data, it cannot be triggered faster than every 20 ms.
Each fault report is stored as a file; the relay capacity is 15 files. A 16th trigger overwrites the oldest file.
The EnerVista software is required to view all captured data. The relay faceplate display can be used to view the date and
time of trigger, the fault type, the distance location of the fault, and the reclose shot number.
The setting selects the source for input currents and voltages and disturbance detection.
FAULT REPORT 1 SOURCE
The setting assigns the FlexLogic operand representing the protection element/elements requiring
FAULT 1 REPORT TRIG
operational fault location calculations. The distance to fault calculations are initiated by this signal. The
and
MAG FAULT REPORT 1 Z0 MAG
The
FAULT REPORT 1 VT SUBSTITUTION
VTs are used, and the relay is supplied with the neutral (3V0) voltage, this setting is set to "V0". The method is still exact, as
the fault locator combines the line-to-line voltage measurements with the neutral voltage measurement to re-create the
line-to-ground voltages. See the
the delta and neutral voltages under the source indicated as input for the fault report. Also, the relay checks if the auxiliary
signal configured is marked as "Vn" by the user (under VT setup) and inhibits the fault location if the auxiliary signal is
labeled differently.
If the broken-delta neutral voltage is not available to the relay, an approximation is possible by assuming the missing zero-
sequence voltage to be an inverted voltage drop produced by the zero-sequence current and the user-specified
equivalent zero-sequence system impedance behind the relay: V0 = –Z0  I0. In order to enable this mode of operation, the
FAULT REPORT 1 VT SUBSTITUTION
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
impedances are entered in secondary ohms.
setting is set to "None" if the relay is fed from wye-connected VTs. If delta-connected
ACTUAL VALUES  RECORDS  FAULT REPORTS
setting is set to "I0".
PRODUCT SETUP
FAULT REPORT 1 Z1
menu for details. It is required to configure
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