GE D90 Plus Instruction Manual page 535

CHAPTER 10: DIGITAL FAULT RECORDER
NOTE:
NOTE:
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Trigger Position
Range: 1 to 100% in steps of 1
Default: 50%
This setting specifies the amount of pre-trigger data stored in a disturbance record
expressed as a percentage of the disturbance record length.
Maximum Re-Triggers
Range: 1 to 4 in steps of 1
Default: 2
This setting selects the maximum number of re-trigger records that can be generated
for a disturbance event. The value is limited to one less than the number of records that
can be stored (up to a maximum of four records).
Block Trigger
Range: any FlexLogic operand or shared operand
Default: OFF
When the operand assigned to this setting is asserted, all triggers to the disturbance
recorder are inhibited.
When changes are made to the disturbance recorder settings, all existing disturbance
records are cleared.
The disturbance recorder starts collecting data upon power up or after the recorder is
cleared. If a trigger occurs immediately after a power up or the clearing of disturbance
records, and there is not enough pre-trigger data, then the pre-trigger is set to the amount
of data collected and does not reflect the value specified by the user.
Figure 457: Disturbance recorder trigger logic
DISTURBANCE RECORDER
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