Power transformer extension

[francois.lacombe]

Hi,

An extension proposal had been accepted regarding power transformer mapping. Both power transformer and power pole with transformer presets should be updated.
​https://wiki.openstreetmap.org/wiki/Proposed_features/Transformer_extension_proposal

Tagging of power=transformer has been updated accordingly
​https://wiki.openstreetmap.org/wiki/Tag:power%3Dtransformer#Tagging

User should be prompted for the following tags (with according label), out of casual ones :

• transformer= {distribution, generator, converter, traction, auto, phase_angle_regulator, auxiliary, yes} (Function of transformer)
• location=* (Transformer location)
• phases=* (Number of phases)
• frequency=* (Operating frequency)
• voltage:primary=* (Primary "power plant side" voltage)
• voltage:secondary=* (Secondary "consumer side" voltage)
• voltage:tertiary=* (Tertiary "auxiliary side" voltage)
• windings=* (Number of windings)
• windings:configuration = {star, delta, open-delta, zigzag, open, scott, leblanc} (Windings configuration)
• rating=* (Rating in VA)
• devices=* (Number of different transformer devices)

voltage=* key shouldn't be used any more on power transformers.

Additionally, some validation rules should be created as follow and warn users :

• Check rating=* is given in VA and without any unit in the value (like multiples kVA, MVA,...)
• Check voltage=* isn't associated with power=transformer or transformer keys

Thank you in advance to take care of this, all the best.