GE L90 Instruction Manual page 289

CHAPTER 5: SETTINGS
— 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.
5.3.8.2 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.
5.3.8.3 Analog channels
SETTINGS  PRODUCT SETUP  OSCILLOGRAPHY  ANALOG CHANNELS
 ANALOG CHANNELS

These settings select the metering actual value recorded in an oscillography trace. The length of each oscillography trace
depends in part on the number of parameters selected here. Parameters set to "Off" are ignored. The parameters available
in a given relay depend on
• the type of relay,
• the type and number of CT/VT hardware modules installed, and
• the type and number of analog input hardware modules installed
A list of all possible analog metering actual value parameters is presented in Appendix A: FlexAnalog Parameters. The
parameter index number shown in any of the tables is used to expedite the selection of the parameter on the relay display.
It can be time-consuming to scan through the list of parameters via the relay keypad and display — entering this number
via the relay keypad causes the corresponding parameter to display.
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
DIGITAL CHANNEL 1:

Off

DIGITAL CHANNEL 63:

Off
Figure 5-42: Quick selection window
ANALOG CHANNEL 1:

Off

ANALOG CHANNEL 16:

Off
Range: FlexLogic operand
Range: FlexLogic operand
Range: Off, any FlexAnalog/actual value parameter
See Appendix A for list
Range: Off, any FlexAnalog/actual value parameter
See Appendix A for list
PRODUCT SETUP
5
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