Current Differential Relay
GARD 8000 SYS RFL Electronics
June 20, 2014 13-33 973.334.3100
Oscillography Settings Definitions – Configuration:
Oscillography Duration (10-180 inc 1)
This sets the length of each oscillography recording in units of cycles. The setting must be between 10
cycles and 180 cycles (inclusive) in increments of 1. The length selected for each oscillography
recording will impact the total number of recordings that can be saved in the system. Changing this
parameter will cause all previously recorded oscillography records to be erased.
See section 13.6.2.1 for further information.
Oscillography Pre-Trigger (0-180 inc 1)
This sets the length of pre-trigger data to be recorded for each oscillography recording. The setting
must be between 0 cycles and 180 cycles (inclusive) in increments of 1. If the setting exceeds the
oscillography duration setting (see above) the relay will save the entire recording as pre-trigger data.
Changing this parameter will cause all previously recorded oscillography records to be erased.
For further information see section 13.6.2.2.
Oscillography Settings Definitions – Triggers:
The user may configure which signals within the relay will cause an oscillography recording to be
initiated.
In addition to the user selectable triggers the design of the relay sets all trips as valid oscillography
triggers. Thus, a change of state (becoming active or inactive) in any primary tripping element (see
sections 13.5.1.2 through 13.5.1.5) or backup element (see sections 13.5.1.6 through 13.5.1.6.5) for
any phase or ground that will initiate an oscillography recording.
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