Talk:Grounding transformer

	Engineering portal This article is within the scope of WikiProject Electrical engineering, a collaborative effort to improve the coverage of Electrical engineering on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Electrical engineeringWikipedia:WikiProject Electrical engineeringTemplate:WikiProject Electrical engineeringelectrical engineering articles
Low	This article has been rated as Low-importance on the project's importance scale.

Suggest merge September 2017[edit]

Zigzag transformer is one type of grounding transformer and the two articles could usefully be combined for a more comprehensive presentation of the topic. --Wtshymanski (talk) 18:52, 4 September 2017 (UTC)[reply]

Well, they do have a certain overlap, but they aren't really the same thing:

Zigzag transformers are often used as service transformers, particularly in European-style LV networks. Yz5 is a relatively common connection for MV/LV transformers up to ~250 kVA, e.g. [1] [2] (p. 196)
Grounding transformers for MV networks are often Ynd – while zigzag is better suited for the job, utilities often have a spare Yd in stock, and adapting them for the job turns out to be cheaper. (AFAICT, grounding transformers are basically a hack used when a network originally designed as isolated neutral undergoes a redesign; I don't think people normally design the networks that way from scratch).

Further, I think that Zigzag transformer is a misnomer – zigzag is just a type of winding connection, that should be treated along with delta and wye. The latter two are currently treated in Three-phase electric power#Balanced circuits and to a lesser extent in Vector group; I think they should better be split to a separate article. Three-phase transformer connections, perhaps? No such user (talk) 08:20, 5 September 2017 (UTC)[reply]