Re: Pole Transformer Basics

• To: tesla-at-pupman-dot-com
• Subject: Re: Pole Transformer Basics
• From: Charles Brush <cfbrush-at-interport-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Tue, 03 Aug 1999 11:41:34 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>> Dear List,
>>
>> I've been studying pole transformers in my area, and I've got questions.
>> Some pole transformers have two identical HV bushings.  Others have a
>> single HV bushing on top, with a second bushing hung outboard on a bracket.
>>  I'm guessing that I'm seeing single ended & double ended transformers.
>>
>> Is one kind preferable to the other for coiling?
>>
>> Why would a power company use both kinds?  Why not just use all the same
>kind?
>>
>> Just wondering.
>>
>> Greg


Greg,

I think Rob Twidle provided a good explanation of how double and single
bushing pole transformers work.  I just wanted to add that the the second
bushing "hung outboard on a bracket" that you described may well be a
lightning arrester.  These are often attached this way, and look just like
another bushing.  You see them all over.

Zap!

Charles Brush
http://www.foundrygroup-dot-com/cbrush/fun

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