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Re: RE- Transformer question


From: 	David Huffman[SMTP:huffman-at-FNAL.GOV]
Sent: 	Monday, September 08, 1997 12:44 PM
To: 	'Tesla List'
Subject: 	RE: RE- Transformer question

What you suggest will work and I have/am still considering it. It's my frugal nature that looks for more from less. Stacking the transformers means using more oil than is really necessary if a 5gal bucket is utilized. It would also require structures to hold them in position. The unit is more top heavy when stacked and, for a plastic bucket, the bottom needs to be reinforced. I placed them in and lifted the bucket. I get the impression that eventually the bottom might split from the concentrated weight. 
It just seemed to me I could eliminate some space/weight that was not necessary by joining the two transformers. After sealing my driveway I had a nice plastic bucket looking like it could do some TC duty.
Dave H.



From: 	Robert Michaels[SMTP:robert.michaels-at-online.sme-dot-org]
Sent: 	Sunday, September 07, 1997 8:24 AM
To: 	tesla-at-pupman-dot-com
Subject: 	RE- Transformer question

        It will work just fine -- if you obtain complete magnetic
        coupling between the melded cores, no air gaps allowed.

        Howsoforeverbethatasitmay -- Placing oil in a plastic bucket
        on a long-term basis is a rather no-good idea.

        Why not get a standard DOT 5-gallon steel pail (the type in
        which paint (and numerous other things) are shipped)????

        Such pails are readily available at the better paint stores
        and, given that you do not need a new one you may be able to
        get a used one for free.   You can also find numerous used ones
        behind the offices of painting contractor firms, with or
        without some Dumpster-Diving being required.

        It is my sense that two whole transformers can be stacked
        one atop the other in such pails, tho I've made no measure-
        ments.    If you obtain a new cover for the pail, you can
        create a hermetic seal.  With a petcock in the cover you
        can suck out the air from the transformer interstices.

        A steel cover also provides a fine surface for mounting two
        large (and suitably intimidating) porcelain insulators.

                BTW -- since you will need most of 5-gal. of
                transformer oil for this project you might also
                use the 5-gal. pail in which the oil is shipped
                as the housing for the transformers, no?


                                      Half making it, half faking it,
                                      in --  Detroit, USA

                                      Robert Michaels




T>From:  David Huffman[SMTP:huffman-at-FNAL.GOV]

T>Hi Everyone,
T>I thought some comments from the knowledge of this group would be helpful
T>before I try this.  I have two H&R transformers which I want to submerse in
T>oil. In order to save space I would like to do the following. The transformer
T>have the 'E' and 'I' laminatio
T>ns and all the 'E's and 'I's are on together, not alternated the way some
T>transformer are built. My question is can the 'I' section be removed from eac
T>transformer and then couple the two together? I would of course phase the
T>primaries so the field is correc
T>t. My initial thoughts are that this should work, but I often overlook the
T>obvious.  I hope it is clear what I want to do.
T>Any comments would be appreciated.
T>Dave Huffman
T>BTW If this will work it will allow the two transformers to be placed in the
T>bottom of a 5 gallon plastic bucket. A couple of brass bolts through the side
T>and I have a poor mans pole pig.