GE RPV311, Technical Manual

Page: 133 / 295

RPV311 Chapter 6
– Records
RPV311-TM-EN-7 133
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 60 seconds.
1.3 Sampling Rate
The trigger recorder sampling rate is user-selectable from 256, 128, or 64 points-per-
cycle of the nominal frequency of the input signal. The size of the records is
proportionally affected.
The continuous recorder sampling rate is 16 points-per-cycle of the nominal
frequency of the input signal.
Both analog and digital inputs are recorded at the same sampling rate depending on
the type of recorder, i.e. Triggered fault records: 256, 128, or 64ppc and Continuous
fault record: 16ppc.
1.4 Re-trigger and Record Concatenation
When two or more consecutive triggers happen, case the post-fault time of the first
trigger and the pre-fault time of the second trigger cross each other, then the
RPV311 concatenates both records and stores it in a single COMTRADE file.
In the figure below, if the time T≤ pre-fault time + post-fault time, then the records
are concatenated:
Figure 70: Concatenation event example
If the pre-fault time of the second register does not overlap the post-fault time of the
first records, then the RPV311 creates two separate COMTRADE files.
In the figure below, if T ≥ pre-fault time + post-fault time, then the RPV311 creates
two separate COMTRADE files.