By prc,
I was maintaining a list of standards relevant to Transformers -for application, specification, manufacturing,testing and maintaining transformers. Attached please see the updated list. May be useful to some of you.
2018-06-26-Standards_Relevant_to_Transformers-prc_-2018-06.pdf (118.7 KB)
(pdf is 40 pages. Here is table of contents and first page)