Oscillography - GE L60 Instruction Manual

5.2 PRODUCT SETUP
The trigger can be any FlexLogic™ operand, but in most applications it is expected to be the same operand, usually a vir-
tual output, that is used to drive an output relay to trip a breaker. To prevent the overwriting of fault events, the disturbance
detector should not be used to trigger a fault report. A
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 oper-
ated 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 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 can not be triggered faster than every 20 ms.
Each fault report is stored as a file; the relay capacity is fifteen (15) files. An sixteenth (16th) trigger overwrites the oldest
file.
The EnerVista UR Setup 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
FAULT REPORT 1 SOURCE
setting assigns the FlexLogic™ operand representing the protection element/elements requiring oper-
FAULT 1 REPORT TRIG
ational fault location calculations. The distance to fault calculations are initiated by this signal. The
and
FAULT REPORT 1 Z0 MAG
See the
ACTUAL VALUES
a) MAIN MENU
PATH: SETTINGS PRODUCT SETUP
5

OSCILLOGRAPHY

Oscillography records contain waveforms captured at the sampling rate as well as other relay data at the point of trigger.
Oscillography records are triggered by a programmable FlexLogic™ operand. Multiple oscillography records may be cap-
tured simultaneously.
The
NUMBER OF RECORDS
other factors such as sample rate and the number of operational CT/VT modules. There is a fixed amount of data storage
for oscillography; the more data captured, the less the number of cycles captured per record. See the
RECORDS OSCILLOGRAPHY
ple configurations with corresponding cycles/record.
5-24
setting selects the source for input currents and voltages and disturbance detection. The
impedances are entered in secondary ohms.
RECORDS FAULT REPORTS
OSCILLOGRAPHY
NUMBER OF RECORDS:
15
TRIGGER MODE:
MESSAGE
Automatic Overwrite
TRIGGER POSITION:
MESSAGE
50%
TRIGGER SOURCE:
MESSAGE
Off
AC INPUT WAVEFORMS:
MESSAGE
16 samples/cycle
DIGITAL CHANNELS
MESSAGE
ANALOG CHANNELS
MESSAGE
is selectable, but the number of cycles captured in a single record varies considerably based on
menu to view the number of cycles captured per record. The following table provides sam-
L60 Line Phase Comparison Relay
event is automatically created when the report is
FAULT RPT TRIG
menu for additional details.
Range: 1 to 64 in steps of 1
Range: Automatic Overwrite, Protected
Range: 0 to 100% in steps of 1
Range: FlexLogic™ operand
Range: Off; 8, 16, 32, 64 samples/cycle
5 SETTINGS
FAULT REPORT 1 Z1 MAG
5.2.8 OSCILLOGRAPHY
ACTUAL VALUES
GE Multilin