| It is
preferable to try to obtain the required secondary
voltages using separate identical primaries to be used
in series or parallel. For example, two identical 115v
50 Hz primaries would be connected in series to obtain
230v 50 Hz, or in parallel to obtain 115v, 50 Hz. This
arrangement is the most economical in both price and
transformer size. A more versatile arrangement would be
2 identical primaries of, for example, 0-100-115V. This
will provide 100, 115, and 230V, covering input voltages
for places such as Japan, USA, and Europe.
(The unused taps must then
be insulated well, as these will be at their stated
voltages above ground and to the other windings when the
transformer is in use.)
Another option (which
generally requires a larger and more expensive
transformer), is a multi-tapped or ladder
primary.
|
