Our practice is to have a maximum of 3 sec to clear end of line faults. Keeping in mind no alloweed equipment damage allowed. What no one is sure about is where that number came from. The REA has some comments to allow up to 20 sec to clear end of line faults. What is the practice, i.e...
That is done very often. The issue becomes the time, (using line crew), it takes to install temporary fuses versus just using the reclosure bypass blades when the maintenance time for testing the controls is very short. Does anyone accept that kind of exposure.
To protect faults on our MV long distribution lines we use reclosers to see end of line faults. The questions is what is the protection practice when the reclosers are in the bypass mode for repair or maintenance and the back up protective device cannot see the end of the line fault.. Is...
