To complete the suite of transformers (currently oosourcetrans and ooosource) it would be usefull to also have the autotransformer (with the centerpoint for ground and also the wye, delta and zig connection as in oosourcetrans and ooosource).

Show the component and its usage

Add references to standards, usage, etc.
https://www.iso.org/obp/ui#iec:grs:60417:5941
https://www.iso.org/obp/ui#iec:grs:60417:6018