[Tagging] Feature proposal - RFC - Power transformers classification

[John Sturdy]

I think that what you're calling a "tertiary winding" is actually a
secondary winding at a different voltage.  A "tertiary winding" appears to
be something else, according to various references such as
https://www.vatransformer.com/wp-content/uploads/significance-of-tertiary-windings.pdf

John


On Mon, Aug 9, 2021 at 10:33 PM François Lacombe <fl.infosreseaux at gmail.com>
wrote:

> Dear all,
>
> Undergoing RFC on "Power substations on nodes" proposal enlighten some
> inconsistencies on power transformers classification we should fix. It's an
> opportunity to make things simpler as well.
>
> A second document has been written and you're are kindly invited to
> express concerns or comments you may have about what is proposed.
>
> https://wiki.openstreetmap.org/wiki/Proposed_features/Transformers_classification_refinement
>
> Main points are:
> * Introduce a new value transformer
> <https://wiki.openstreetmap.org/wiki/Key:transformer>=main
> <https://wiki.openstreetmap.org/w/index.php?title=Tag:transformer%3Dmain&action=edit&redlink=1>,
> consistent with transformer
> <https://wiki.openstreetmap.org/wiki/Key:transformer>=auxiliary
> <https://wiki.openstreetmap.org/wiki/Tag:transformer%3Dauxiliary>, to
> replace transformer <https://wiki.openstreetmap.org/wiki/Key:transformer>=
> distribution
> <https://wiki.openstreetmap.org/wiki/Tag:transformer%3Ddistribution> only
> for transformers in a substation and transformer
> <https://wiki.openstreetmap.org/wiki/Key:transformer>=traction
> <https://wiki.openstreetmap.org/wiki/Tag:transformer%3Dtraction> every
> time. It will be the default value.
> * Introduce a new tag windings:auto
> <https://wiki.openstreetmap.org/w/index.php?title=Key:windings:auto&action=edit&redlink=1>
> =yes
> <https://wiki.openstreetmap.org/w/index.php?title=Tag:windings:auto%3Dyes&action=edit&redlink=1>
> to specify a given transformer is an auto-transformer, whatever its actual
> role (main, converter...) could be.
> * Deprecate existing transformer
> <https://wiki.openstreetmap.org/wiki/Key:transformer>=traction
> <https://wiki.openstreetmap.org/wiki/Tag:transformer%3Dtraction> and
> transformer <https://wiki.openstreetmap.org/wiki/Key:transformer>=auto
> <https://wiki.openstreetmap.org/wiki/Tag:transformer%3Dauto>
>
> Rationale will gives you more insights about challenges that should be
> tackled.
> transformer=traction directly regards railways power systems.
>
> All the best
>
> François
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