GE D30 Instruction Manual page 325

CHAPTER 5: SETTINGS
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.
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
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
Figure 5-49: Quick selection window
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
is set to "Automatic
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