GE 845 Instruction Manual page 177

CHAPTER 4: SETPOINTS
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
NUMBER OF RECORDS
Range: 1 to 16 in steps of 1
Default: 5
The selection from the range defines the desired number of records.
SAMPLES PER CYCLE
Range: 8/c, 16/c, 32/c, 64/c, 128/c
Default: 32/c
This setpoint provides a selection of samples-per-cycle for representing the waveform.
The waveform records can be viewed using the 8-series PC program.
TRIGGER MODE
Range: Overwrite, Protected
Default: Overwrite
When "Overwrite" setting is selected, the new records overwrite the old ones, meaning
the relay will always keep the newest records as per the selected number of records. In
"Protected" mode, the relay will keep the number of records corresponding to the
selected number of records, without saving further records that are beyond the selected
number of records.
TRIGGER POSITION
Range: 0 to 100% in steps of 1%
Default: 20%
This setting indicates the location of the trigger with respect to the selected length of
record. For example at 20% selected trigger position, the length of each record will be
split on 20% pre-trigger data, and 80% post-trigger data.
TRIGGER SOURCE:
Range: Off, Any FlexLogic operand
Default: Off
The trigger source can be any digital input: an operand from the list of FlexLogic
operands, a contact input, a contact output, a virtual input or output, or a remote input
or output.
TRIGGER ON ANY PKP
Range: On, Off
Default: Off
Selection of "On" setting enables triggering of the recorder upon pickup condition
detected by any of the protection or control elements.
TRIGGER ON ANY OP
Range: On, Off
Default: Off
Selection of "On" setting enables triggering of the recorder upon operate state of any of
the enabled protection or control elements.
TRIGGER ON TRIP
Range: On, Off
Default: Off
Selecting the "On" setting enables triggering of the recorder when any of the protection
elements configured as a "Trip" function operates, or the state of the operand assigned
to operate the #1 Trip output relay changes to "high".
DEVICE
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