Interesting fault video
Interesting fault video
(OP)
As seen on Facebook, I downloaded the video (attached) for a tree hitting an OHTL.
I wonder how the protection didn't act quickly enough to avoid that much arcing? A flashover (not involving earth) seemed to appear pretty much as an Over Current to the substation that the relay didn't act on?
I don't know the line voltage here but looks like something around 115 kV or less, the tree/wooden pole isn't a good ground connection (Ground fault not working), it doesn't seem to be an auto-reclosure neither(isn't it?)..... phase-to-phase arcing is what I guess here..
I wonder how the protection didn't act quickly enough to avoid that much arcing? A flashover (not involving earth) seemed to appear pretty much as an Over Current to the substation that the relay didn't act on?
I don't know the line voltage here but looks like something around 115 kV or less, the tree/wooden pole isn't a good ground connection (Ground fault not working), it doesn't seem to be an auto-reclosure neither(isn't it?)..... phase-to-phase arcing is what I guess here..






RE: Interesting fault video
It doesn't take much to move an arc along parallel conductors.
I can't explain the final arc to the right.
Bill
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"Why not the best?"
Jimmy Carter
RE: Interesting fault video
RE: Interesting fault video
bouncing due to short circuit forces is common.
RE: Interesting fault video
There is one just like this but up on transmission in Dallas in 2010-2011. It went on for minutes before it was cleared. It is on youtube someplace, I know.
RE: Interesting fault video
RE: Interesting fault video
I think a phase-balance will pick that, but looks like the line isn't protected with this function, not common to see it though.
RE: Interesting fault video
RE: Interesting fault video
Keith Cress
kcress - http://www.flaminsystems.com
RE: Interesting fault video
RE: Interesting fault video
RE: Interesting fault video
RE: Interesting fault video
RE: Interesting fault video
https://www.youtube.com/watch?v=_FsRZ-I9_F0
RE: Interesting fault video
I knew the protection engineer that was with the utility this happened on. There is a rural co-op that covers over 3/4 of Oklahoma. They only had one protection engineer. When he retired, his job got outsourced to a relay manufacture. The utility has been looking for a protection engineer for years and they are actually offering pretty decent pay ,extremely decent if you take into account the cost of living, but nobody wants to move to Oklahoma. If someone took the job, I think they could raise a family and save 2 out 3 or 3 out of 4 paychecks.
RE: Interesting fault video
RE: Interesting fault video
RE: Interesting fault video
In regards to the job opening, is it something that someone can do from Home?
RE: Interesting fault video
Don't know his number or remember his name. I don't know how technical of a response you would have gotten. The guy worked his way up from a technician to being the relay guy. He retired at like 50 because he had kidney problems and had the money since he never had kids.
Maybe, I don't know. I think most utilities would like a guy on site for resolving outages. Maybe, they just need a guy for project work. I don't know.
RE: Interesting fault video