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Blown SF6 Breaker

Blown SF6 Breaker

2020sucks86

Hey guys. Think you could have this back in an hour or 2?


gwtechno

SF6 as in sulfur hexafluoride?


chrispl57

Yup


JohnProof

Yes, it does some piddling stuff with insulation and arc quenching, but what's *actually* important here is that [it makes your voice deeper.](https://www.youtube.com/watch?v=d-XbjFn3aqE)


mr_rogers_69

How often do y'all see SF6 breaker failures like this? Did it fail during operation?


chrispl57

Failed while in service I know of 4 that have failed like this. IIRC the few that failed like that where due to slow relays / bad settings. And they where always an animal contact.


mr_rogers_69

Thanks for the info!


___-__--__----__----

Sounds like your relay application engineers need some serious training.


chrispl57

Yeaaaaa that’s one of the many reasons I left that company


gojumboman

Hot damn! Looks like Spider-Man kept that pole from taking off


2centdude

Nice. Fault on opening or what?


TheMayoCrusades

Bushing went bye-bye


JohnProof

"Density, schmensity, there's still some gas in there just open the damn thing!"


andersonic95

60kv?


chrispl57

26


ElprofesorAleman

Was gonna say. Can's don't look long enough for 66kv


tcortez5420

Really? is it a feeder breaker?


chrispl57

Bus tie between 26kv lines


tcortez5420

I saw that you said it failed while in service. Was there a transformer out and this thing just failed outta nowhere?


chrispl57

It was a temp flow through station just tiring a few lines together with no transformers. Failure was due to an animal contact.


DarylDarylDarylDaryl

I may be wrong but I bet it’s rated for 72.5kV…. Just looking at those bushings


duollama

Rip


ElprofesorAleman

Have had 3-4 fail over the years, but all entirely internal. Had one that was catastrophic, but it was taken out by a Willie Wonka bundle of Mylar balloons. Breaker didn't have a chance.