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More Utility Goodies
Posted by fred berry on 12/12/2005, 9:55 am
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Re: More Utility Goodies
Posted by Bert Hickman on 12/12/2005, 11:18 pm, in reply to "More Utility Goodies" Hi Fred, Thanks for the kind words! I've been fortunate in having a number of folks in the industry provide me with various "interesting" pictures and video clips. I'm still trying to get more information about where the exploding transformer occurred (I heard it was somewhere in Florida), but I've had no success thus far. I agree that the dense black smoke probably means an arcing fault in another tranny, an oil breaker, or perhaps a capacitor bank. I think I may have seen the 345 kV image you describe - please pass me the URL if you happen to have it handy. Best wishes and happy holidays! Bert
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Re: More Utility Goodies
Posted by Gsry Powell (CE-Electric UK) on 4/17/2006, 1:04 am, in reply to "Re: More Utility Goodies" --Previous Message-- :Hi Fella's Just found this site & its really "interesting" video's. I am the EHV maintenance (33 - 132kV) team leader for the regional electricity company covering NE England. We use the exploding transformer on training courses and the fault has been described to us as an LV single core fault within an unprotected restricted earth fault zone. The cables carried on burning until ..... wait for it......... the WATER fire suppressant operates. BOOOOOM. Burning oil & water not a good mixture. Cheers Gary Powell
Link: http://www.ce-electricuk.com/page/news/publications.cfm
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Re: More Utility Goodies
Posted by Bert Hickman on 4/17/2006, 12:48 pm, in reply to "Re: More Utility Goodies" Hi Gary, Thanks for the additional information. I had previously heard that it was vaporized oil, and a couple of other reports that it might be a water spray. I am really hoping to get some feedback from one of the folks at Florida Power so that I can determine just what was coming from the top of the transformer and the events leading to the failure. One FP lineman indicated that the top of the transformer was actually blown open towards the end, which might explain the flow of flaming oil afterwards. In any event, I've added a comment in the text that the white mist might actually be water from a fire suppression system. If you happen to have any leads that are closer to the source, I would really appreciate it. Thanks again and best wishes, Bert
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