Talk:Vector group

The meaning of capital and small letters
The article says that capital letters are used for primary windings, while small letters are used for secondary windings.

Now, as far as i know, the convention is: capital letters for high voltage side, and small letters for low voltage side. This isn't always the same as what is stated in the article.

As i am not sure, I didn't want to edit it right-away. If anyone can confirm this and edit the article accordingly, it would be great.

Sinan Taifour (talk) —Preceding comment was added at 11:12, 17 January 2008 (UTC)


 * In once learned that the primary side is denoted by capital letters. And usually, the primary side is also the high voltage side. Wikispaghetti (talk) 01:40, 28 January 2013 (UTC)


 * Apparently the primary and the HV side are not the same as discussed in this article. 174.118.142.187 (talk) 12:33, 3 May 2013 (UTC)

According to this (http://static.squarespace.com/static/5005eed384aedff14624a980/t/5152781fe4b0574a80b78f63/1364359199773/Understanding%20Vector%20Group%20of%20Transformer.pdf), it's HV then LV. The high-voltage side is always first, even if it's not the primary side. Tara Zieminek —Preceding undated comment added 22:36, 27 June 2013 (UTC)

According to whom this is called a vector group?
I’ve read in many websites the name “vector group “, yet the IEC standard 60076-1 never uses that name, but instead it uses “connection symbol”. So we should clarify this in the lead paragraph, either by changing it to something like “In electrical engineering, a vector group, officially called a connection symbol, is […]”, or we should remove the phrase “vector group” altogether. —Alej27 (talk) 14:45, 16 July 2021 (UTC)