IG-150-EN version 04; 03/10/16
109
General instructions
ekor.rps
Protection functions. Description and settings
The parameters with the transformation ratios of CT and VT
are communicated to the relay from the general settings
screen included in the following figure:
Figure 4.40.
General settings screen
The result of the distance calculation is included in the fault
report as indicated in the following figure:
Figure 4.41.
Fault report
4.29.3. Locator operation
The process that the algorithm follows can be summarised
in 5 steps, which are explained below:
1. Detection of the fault instant
2. Pre-fault and post-fault filtering
3. Determination of the kind of fault
4. Location algorithm
5. Presentation of the results
Fault detection
Once the protection has started up, the fault detection
algorithm begins to process the analogue signals received
in search of the exact instant at which the fault occurred.
This search is made by a comparison of the samples
between consecutive cycles.
Once the fault instant has been determined, a total of 20 fault
cycles are stored in memory, and it waits for confirmation
of protection tripping in order to process the stored data.
In the event that the protection start-up relapses without
tripping, the process of calculating the distance to fault is
aborted.
In case the protection trips, the processing of the collected
signals continues.
Summary of Contents for ekor.rps
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