Alstom Reason RPV311 - Recording Times by Trigger; Sampling Rate; Re-Trigger and Record Concatenation

Chapter 6 – Records
RPV311
158
RPV311-TM-EN-6
2.2 RECORDING TIMES BY TRIGGER
Once triggered, the following parameters are considered by the fault recorder:
Parameter
Allowed values
Increment
Pre-fault time (

)
0 … 5 s
0.1 s
Post-fault time (

)
0 … 60 s
0.1 s
Maximum Record time (

)
1 … 60 s
0.1 s
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.
2.3 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.
2.4 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: