GE D90 Plus - Page 535

CHAPTER 10: DIGITAL FAULT RECORDER DISTURBANCE RECORDER
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 525
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.
NOTE
NOTE:
When changes are made to the disturbance recorder settings, all existing disturbance
records are cleared.
NOTE
NOTE:
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
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