Talk:Zigzag transformer

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First[edit]

I think the description of how the topology actually looks is at least unclear (should "turn around" mean what I think is missing?). This paper was a lot more helpful on finding out what they do and how they look: http://www.ipst.org/TechPapers/2005/IPST05_Paper044.pdf Additionally, this paper provides the detail on how exactly ZigZag transformers help reduce harmonics, a claim that puzzled me at first.

Why it can be used to provide a path for short-circuit currents becomes more evident by pointing out that the reactance of a ZigZag transformer with equal number of windings on both legs involved for each phase is in symmetrical components proportional to [1 0 0; 0 1 0; 0 0 0], so the zero-system is always short-circuited, the reactance of the others can be chosen arbitrarily high to reduce ohmic losses. —Preceding unsigned comment added by 84.73.62.20 (talk • contribs) 22:15, 15 March 2006

This poster is correct. I am an experienced electronic engineer and I have no clue how this really works. This page needs to be expanded. I came here to learn how a ziz-zag transformer works and I know nothing more than I knew when I arrived.Trojancowboy (talk) 18:27, 26 November 2011 (UTC)[reply]

yes, i too had to look else where. The reason why the symbol is as it is, it shows the phases as vectors (angles) and notice the outer bent leg is the same angle as an inner bent leg, and this is how it is wired, with those two in series but on the same transformer leg as the inner leg it is connected to in the symbol.Charlieb000 (talk) 10:15, 3 February 2013 (UTC)[reply]

Query[edit]

Quote Zero sequence (earth fault) current flows between the zigzag’s neutral to the phase effected by the fault. Shouldn't it be "affect"? —Preceding unsigned comment added by 86.141.118.54 (talk) 13:13, 26 October 2007 (UTC)[reply]

Colloquial article name[edit]

References do not support the title of ZigZag transformer. This is a short formed colloquial name used by people in the electrical field. Transformers are not zigzag. Windings, used in transformers are zigzag. Credible references use the term zigzag winding(s) configuration.

The transformer being referred to by this article is called Grounding transformer or Earthing transformer (in Europe) and the article should be named accrdingly to avoid confusion to readers. Most grounding transformers use zigzag windings but it is not the only configuration used. Also, zigzag windings are used as configurations in many topographies of transformers: wye/zigzag, delta/zigzag, zigzag/zigzag, zigzag/delta, zigzag/wye, delta//zigzag/zigzag (dual secondary). Some of the types are more common than others, of course.

Please check Talk:Transformer#Zig-zag [1] for several references supplied by Cblambert for verification of this. 174.118.142.187 (talk) 04:58, 24 January 2013 (UTC)[reply]

Zig-zag transformer Principle of Operation[edit]

This article fundamentally misrepresents how zig-zag transformers work in a ground fault detection scheme. It claims that in the event of a ground fault, the winding fluxes no longer cancel, enabling fault current to flow through the neutral. This is completely backwards. During a ground fault (i.e., a considerably unbalanced load), the zero sequence current components that flow through the zig-zag windings produce MMFs that DO cancel in each core leg. This cancelling of MMFs means that the windings possess very little impedance to zero sequence currents (changing flux is what gives inductors their property of impedance in the first place). Any small impedance that does exist would be a function of the winding resistance and leakage reactance of each coil. If winding fluxes cancelled during normal operation (i.e., NON-fault conditions), then the zig-zag would just look like a gigantic load on the system all of the time. Here is a good explanation of how these transformers actually work: https://eepower.com/technical-articles/characteristics-and-uses-zig-zag--and-wye-delta-grounding-transformers/# — Preceding unsigned comment added by 156.74.249.243 (talk) 16:18, 17 November 2021 (UTC)[reply]

German diagram[edit]

Is it possible to find a diagram that is labeled in English? 2600:1700:8B40:4660:25C3:11BD:2F1B:1442 (talk) 02:41, 5 October 2022 (UTC)[reply]