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CHAPTER 6: SETPOINTS
Transient recorder
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
VIRTUAL INPUTS
Range: Disabled, Enabled
Default: Enabled
When set to "Enabled", the event recorder records the events, which occur upon state
changes of any logic element.
REMOTE INPUTS
Range: Disabled, Enabled
Default: Enabled
When set to "Enabled", the event recorder records the events, which occur upon state
change of any programmed remote input.
SETTING DATE/TIME
Range: Disabled, Enabled
Default: Disabled
When set to "Enabled", the event recorder records the event of the changing of the date
and time.
The Transient Recorder contains waveforms captured at the same sampling rate as the
other relay data at the point of trigger. By default, data is captured for the analog current
and voltage inputs - Ia, Ib, Ic, Ig, Va, Vb, Vc, and Vx when relay is ordered with CTs and VTs,
or only analog current inputs Ia, Ib, Ic, and Ig when relay is ordered without VTs. Triggering
of the transient recorder occurs, when an event is detected, causing a pickup, trip, dropout,
or alarm, any one of which has been "Enabled" to activate the trigger. The transient
recorder trigger may also be activated when any of the selected trigger inputs 1 to 3 is
detected as having "On" status.
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
SETPOINTS > S1 RELAY SETUP > TRANSIENT RECDR
NUM OF RECORDS
Range: 1, 3, 6
Default: 1
This setpoint selects the desired number of records to be saved in the memory.
SAMPLING RATE
Range: 4, 8, 16, 32
Default: 4
This setpoint defines the sampling rate at which transient records will be recorded.
TRIGGER MODE
Range: Overwrite, Protected
Default: Overwrite
When the "Overwrite" setting is selected, the new records overwrite the old ones,
meaning the relay will always keep the newest records. In "Protected" mode, the relay
will keep the number of records corresponding to the selected number, only without
overwriting.
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.
S1 RELAY SETUP
6–19
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