Oscillography - GE B30 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 can 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 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 5–3: 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 can automatically overwrite an older record when
Set the to a percentage of the total buffer size (for example, 10%, 50%, 75%, and so on). A trigger posi-
TRIGGER POSITION
tion of 25% consists of 25% pre- and 75% post-trigger data. The
can be any FlexLogic™ parameter (element state, contact input, virtual output, and so on). The relay sampling rate is 64
samples per cycle.
The setting determines the sampling rate at which AC input signals (that is, 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; that is, it has no effect on the fundamental calculations of the device.
GE Multilin

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 DIGITAL
RATE CHANNELS
8 0
16 16
16 16
16 16
16 16
16 64
32 64
64 64
64 64
B30 Bus Differential System
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
ANALOG CYCLES PER
CHANNELS 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."
TRIGGER MODE
is always captured in oscillography and
TRIGGER SOURCE
5.2 PRODUCT SETUP
5.2.8 OSCILLOGRAPHY
5
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ACTUAL VALUES
5-39