GE DR60, Technical Manual

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DR60
62 DR60-TM-EN- 2A
The Maximum Record time configures the maximum duration that the register can
reach. If consecutive retriggers or a sustained fault happens, the Maximum Record time
establishes the limit of time that the COMTRADE file will register.
The maximum duration of the fault record is 30 seconds.
1.3 Sampling Rate
The wave recorder sampling rate is user-selectable between 256 and 512
samples/cycle. The size of the records is proportionally affected.
Both analog and digital inputs are recorded at the same sampling rate depending on the
type of recorder, i.e. waveform fault records: 256 and 512 samples/cycle and
Disturbance and continuous disturbance recorder: 1, 4 or 4 samples/cycle.
1.4 Trigger Burst Limiter
There is a user-configurable trigger burst limiter for the waveform recorder.
The burst limiter is based on the number of triggers time interval (both parameters are
user-configurable). When the limit is exceeded, recording will be disabled for a period
of time defined by the user.
This configuration aims to prevent excessive processing demand from jeopardizing the
device functioning.
Parameter Allowed values Increment
Number of triggers 1 … 16 1
Time interval 1 … 60 s 1 s
Disabling time 1 … 30 min 1 min
2 Re-trigger and Record Concatenation
In case a consecutive event takes place and triggers the recorder within 1 second after
the post-fault time of the prior event, then the DR60 concatenates both records and
stores it in a single COMTRADE file.
In the figure below, the second trigger happens within the 1 second time window,
which makes the DR60 combine both events in a single file. The re-trigger can be
enabled or disabled via configuration software.