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Re: Dupla Transformer wiring

>>European countries use 50 HZ ( in this case it most likely doesn"t matter,
>>except that the transformer is engineered to make allowances for this and
>>not perform optimally) and somwhere in the neighborhood of 200 volts.
>>plugging it into an American 110 line will cause it to provide half the
>>current and probably 1/4 the heat output.
>The amount of power will only be a quarter of the european power, because
>of ohms law.
>Power = Current * Current * Resistance

I believe the original author stated that the TRANSFORMER WAS 115 VOLT, but
it was equipped with the European plug. If this is the case simply rewire
the cord or plug.

If the unit is a 230/240 volt transformer, the solution may be to
reconfigure or retap the windings. Many manufacturers build transformers
with two 115/120 volt windings. To run the transformer off 115/120 volts,
the two windings are run in parallel, for 230/240 volts, the windings are
in series. When making this change, be sure that the phases of the windings
are connected properly. Often there is an access plate with a terminal
block behind it. By configuring the connections on this terminal block you
can change the transformer voltage.

50/60 hertz does not matter.

If indeed the transformer is 230/240 volts and it can not be retapped, then
buy a new transformer. The effiency of using a stepup transformer to go
from 115/120 volts to 230/240 and then to 24 volts will be worse than just
going from 115/120 volts. The cost of a simalar wattage 115/120 to 230/240
volt transformer and 115/120 to 24 volt transformer should be similar,
other factors being equeal, as they both need the same amount of iron and
copper to handle the same wattage.