Um....what is this??

[megavolt120]

Hello everyone! I'm back with a new user name but will have some very interesting stuff as usual...

Here's the latest...

https://www.extranet.energy.siemens.com/peg/index.html?startpage=206

what kind of insulators are these??????


gotta know!!!!!!!

 

[pwrtran]

Do you mean the bushings or the glass insulators?

 

[megavolt120]

The "glass"...I am under the impression that Glass would not have the physical strength for this application.

 

[prc]

Question is not clear. What is shown in the front page of the booklet is Cast resin transformer with dry type tap changer.

 

[electricpete]

Hello everyone! I'm back with a new user name

What was your old user name?

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(2B)+(2B)' ?

 

[ScottyUK]

If it the image on the next page that you are talking about then it looks like a standard glass OHL insulator on a fairly high voltage line. The object which I think is the transformer HV bushing looks unusual - almost like a section of gas-insulated bus. Haven't seen one of those used in a vertical orientation to connect to an overhead line before. If anyone can confirm what it is, please do - I am curious.


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If we learn from our mistakes I'm getting a great education!

 

[pwrtran]

Glass have very good dielectric characters that have been used for electric insulation since 100 years ago. Today some utilities replace the ceramic insulators back to glass ones because the lower cost to patrol power lines. When a glass insulator is faulty it simply breaks and very easy to visualize it, but a ceramic insulator may just got a tiny crack and no way you can see it.

 

[7anoter4]

I think you mean the bushings: they are cast epoxy resin doped with aluminum oxide Al2O3 made.
See:

http://www.risho.co.jp/english/product/products3/insulator/index.html

or:

http://www05.abb.com/global/scot/sc...7b03ec125711e004fc5b7/$file/TM FluvexCast.pdf

 

[ScottyUK]

Hi 7anoter4,

I'm happy with the conventional bushings on the transformer, it's the larger light-grey coloured ones which don't have the sheds typically found on a bushing for outdoor service which I was curious about.


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If we learn from our mistakes I'm getting a great education!

 

[LionelHutz]

What insulator exactly? The page you linked shows a Siemens tranformer.

And yes, what was your old user name you're back from?

 

[jghrist]

Scotty,
Condenser Oil Transformer ANSI (COTA) Bushing. See

http://www.trenchgroup.com/Produkte/Bushings/-8254-98-98-en-com-/cms,em_url,internal.html

If you look closely, it does have skirts.

 

[ScottyUK]

Thanks jghrist.


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If we learn from our mistakes I'm getting a great education!