Oscillography - GE T35 Instruction Manual

5 SETTINGS
a) MAIN MENU
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PATH: SETTINGS PRODUCT SETUP

# OSCILLOGRAPHY

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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 is selectable, but the number of cycles captured in a single record varies considerably based on
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
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RECORDS OSCILLOGRAPHY
ple configurations with corresponding cycles/record.
Table 5–1: OSCILLOGRAPHY CYCLES/RECORD EXAMPLE
# RECORDS # CT/VTS
1 1
1 1
8 1
8 1
8 2
8 2
8 2
8 2
32 2
A new record may automatically overwrite an older record if
Set the to a percentage of the total buffer size (e.g. 10%, 50%, 75%, etc.). A trigger position of 25% con-
TRIGGER POSITION
sists of 25% pre- and 75% post-trigger data. The
FlexLogic™ parameter (element state, contact input, virtual output, etc.). The relay sampling rate is 64 samples per cycle.
The setting determines the sampling rate at which AC input signals (i.e. current and voltage) are
AC INPUT WAVEFORMS
stored. Reducing the sampling rate allows longer records to be stored. This setting has no effect on the internal sampling
rate of the relay which is always 64 samples per cycle, i.e. it has no effect on the fundamental calculations of the device.
When changes are made to the oscillography settings, all existing oscillography records will be CLEARED.
WARNING
GE Multilin
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OSCILLOGRAPHY
NUMBER OF RECORDS:
15
TRIGGER MODE:
Automatic Overwrite
TRIGGER POSITION:
50%
TRIGGER SOURCE:
Off
AC INPUT WAVEFORMS:
16 samples/cycle
# DIGITAL CHANNELS
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# ANALOG CHANNELS
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menu to view the number of cycles captured per record. The following table provides sam-
SAMPLE # DIGITALS
RATE
8 0
16 16
16 16
16 16
16 16
16 64
32 64
64 64
64 64
TRIGGER MODE
TRIGGER SOURCE
T35 Transformer Management Relay
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
# ANALOGS CYCLES/
RECORD
0 1872.0
0 1685.0
0 276.0
4 219.5
4 93.5
16 93.5
16 57.6
16 32.3
16 9.5
is set to "Automatic Overwrite".
is always captured in oscillography and may be any
5.2 PRODUCT SETUP
5.2.8 OSCILLOGRAPHY
5
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ACTUAL VALUES
5-23