GE D90 Plus Instruction Manual page 526

TRANSIENT RECORDER
NOTE:
NOTE:
516
Trigger Position
Range: 1 to 100% in steps of 1
Default: 50%
This setting specifies the amount of pre-trigger data stored in a record expressed as a
percentage of 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 an event. The value is limited to one less than the number of records that can be
stored (up to a maximum of four records).
Sample Rate
Range: 16, 32, 64, 128, or 256 samples per cycle, or OFF
Default: 32
This setting selects the time-resolution of the transient record. A larger setting
necessarily results in a shorter record length.
Block Trigger
Range: any FlexLogic operand or shared operand
Default: OFF
When the operand assigned to this setting is asserted, all triggers to the transient
recorder are inhibited.
When changes are made to the transient recorder settings, all existing transient records
are cleared.
The transient 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 transient
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.
.
The figure shows the transient recorder trigger logic.
CHAPTER 10: DIGITAL FAULT RECORDER
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL