GE G30 Instruction Manual page 329

CHAPTER 5: SETTINGS
When EnerVista UR Setup creates a new settings file, a Smart defaults feature automatically enters a basic oscillography
configuration. The basic configuration changes the factory default values to make the number of samples per cycle 32,
adds a selection of digital and analog channels that are often of interest, and adds a FlexLogic equation to trigger
oscillography. Review and update this basic configuration as required for the application at hand.
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
RECORDS  OSCILLOGRAPHY
configurations with corresponding cycles/record. The minimum number of oscillographic records is three.
Table 5-13: Oscillography cycles/record example
Records CT/VTs
3 1
3 1
16 1
16 1
32 1
32 1
3 2
3 2
16 2
— A new record automatically overwrites an older record when
TRIGGER MODE
Overwrite."
— Set this to a percentage of the total buffer size (for example, 10%, 50%, 75%, and so on). A trigger
TRIGGER POSITION
position of 25% consists of 25% pre- and 75% post-trigger data.
— Always captured in oscillography and can be any FlexLogic parameter (element state, contact input,
TRIGGER SOURCE
virtual output, and so on). The relay sampling rate is 64 samples per cycle.
— Determines the sampling rate at which AC input signals (that is, current and voltage) are stored.
AC INPUT WAVEFORMS
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.
When changes are made to the oscillography settings, all existing oscillography records are cleared.
5.3.9.2 Digital channels
SETTINGS  PRODUCT SETUP  OSCILLOGRAPHY  DIGITAL CHANNELS
 DIGITAL CHANNELS

— This setting selects the FlexLogic operand state recorded in an oscillography trace. The length of
DIGITAL 1(63) CHANNEL
each oscillography trace depends in part on the number of parameters selected here. Parameters set to "Off" are ignored.
To populate quickly the rows in the Offline Window, use Ctrl C/V to copy/paste, or click then double-click a row to display a
quick selection window.
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
menu to view the number of cycles captured per record. The following table provides sample
Sample rate Digital
channels
32 32
64 32
32 32
64 32
32 32
64 32
32 32
64 32
32 32
DIGITAL CHANNEL 1:

Off

DIGITAL CHANNEL 63:

Off
Analog Cycles per
channels record
16 2399
16 1450
16 666
16 402
16 352
16 213
16 1516
16 851
16 421
TRIGGER MODE
Range: FlexLogic operand
Range: FlexLogic operand
PRODUCT SETUP
ACTUAL VALUES 
is set to "Automatic
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