On 2018-12-20 13:27, Xavier wrote:
> On Thu, Dec 20, 2018 at 01:00:20PM +0100, Sergio Manzi wrote:I *never *heard
> of a transformer's /tertiary/, thus: try asking an electrical engineer...
> In general, a transformer can have 1..N primary windings and 1..N secondary
> windings:
>
> https://www.electronics-tutorials.ws/transformer/multiple-winding-transformers.html
>
> The most common is the 1:1 (single primary, single secondary) transformer,
> followed next by a 1:N style (one primary, multiple secondary, this is
> usually used to provide plural output voltages from the same single
> transformer).
>
> But in the general case (which is what OSM would, at some point, want to be
> able to cover), a transformer is N:N with each N being 1..X.
And then there was the auto-transformer which only has a single winding
with multiple taps.
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