>
>
>> I have an old Berkshire Transformer BTC-4905 It's putting out 3000 v on 110
>> volt. But want to run it on 220 v. The way it's wired now. the two out side
>> wires were the wires being used for what I thought was 220 v with the two
>> wires in the center tied together. However when I put 220 v on the two out
>> side leads I only get about fifteen hundred volts. Any good tips on how to
>> check the windings ? Are anyone know about this transformer? Thanks Leon
>
>If this is a normal dual-primary, the two windings go in parallel for 120
>volts, and
>in series fro 240 volt operation. They must be hooked up in the correct phase
>relationship, or the windings will buck each other, producing only half the
>rated secondary output.
Equal potential out of phase seriesed windings should produce full
smoke/a virtual short..
>If you are getting 1500 volts out with 240 coming in,
>reverse
>the leads on one of the primary windings and see if you don't get 3000 volts
>out.
>
>GL!
>Phil, K5PC
>
>
>
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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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