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MR-REF & MR-REF3 Technical Manual
Issue 3, November 2013
6.13. Disturbance Recording (OPTIONAL).
Disturbance and fault recording is a very effective
tool for personnel to analyses the performance of the
power system and related equipment during and after
a major disturbance.
Disturbance Recording facility is now available using
a unique software activation key.
A total of eight seconds recording can be achieved at
half resolution with the ability to capture multiple
traces, which can be weighted pre and post fault on selectable triggering events.
All the currents and voltages are captured on a single recording (viewable separately) along with a specified digital
output and digital input.
The disturbance traces can be extracted via the standard RS485 port or optional front mounted RS232/USB port in
Comtrade format for high resolution analysis.
Disturbance recording options:
Maximum Traces
Up to eight traces can be recorded. If set to the maximum with full resolution, then each trace length can
only be a maximum of 500ms each.
Trigger
Selects the trigger source to begin recording;
On Trip, On Pick-up, On DI Close or On Start
Trigger Position
Selects the trigger point pre and post fault;
0-100%, 20-80%, 50-50%, 80-20% or 100-0%.
Resolution
The resolution can be set to half (allowing the full eight seconds) or full, which allows a maximum of four
seconds recording.
Digital Input.
Selects which of the 1-2 digital inputs is to be recorded along with the trace.
Digital Output.
Selects which of the 1-4 output relays is to be recorded along with the trace.
Enable Overwrite
Once the maximum traces have been recorded “trace full” will be displayed on screen. If set to overwrite
then new recordings will overwrite those previously stored on a fifo basis.
Trace Time
Displays the time and date of the selected trace, the trace recordings are identified by their time and date
stamp which can be chosen from a pop-up selection.
Clear Traces
This clears and permanently deletes all records traces in the buffer memory.
