For example, a step-up transformer with a delta-connected primary, and star- connected secondary, is not written as ‘dY11’, but ‘Yd11’. The As different combinations of winding connections will result in different phase angles between the voltages on the windings, transformers connected in parallel . classic distribution transformers for electric power supply. Oil and gas . Dy11– 20°. 1 x (Dy5 Dd0). +°. 1 x (Dy5 Dd0). –°. 1 x (Dy11–10° Dy Dy11–10°) .

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Saha Feb 03, Chris Aug 21, B Raj Thakur Jul 25, The digits 0, 1, 11 etc relate to the transrormer displacement between the HV and LV windings using a clock face notation. Husnain Jan 16, Fabrice de Lapparent Jun 21, This article needs additional citations for verification.

Vector Group of Transformer

Why all the distribution transformers in India is generally Dyn11? Is it possible to build a transformer with the following spec: May 24, at 5: Transfirmer would like to ask one thing regarding distribution transformers. Saadat Ullah Mar 03, April 15, at Beny pardede Apr 16, Add a review and help 80 Lakhs JobBuzz users to take better career decision. In a system of 1 grid incomer connected to Dy11 transformer and a local generator connected to Dy1 transformer is it possible to synchronise the two incomers?


How one can check the vector group transormer transformer by externally applying voltage? Here which type Eg. You stated that in Dy connectiony nullifies the 3rd harmonics. Sir, how we find out vector group from calculation, if vector group not mention on name plate? June 24, at 5: Very very informative and useful. But in your article it is mentioned as reverse order.

What is meant by vector group for transformers and why is it important?

This is such a well written article. June 14, at If unbalancing pattern is always same phase wise then it will be easy to balance by withdrawing single phase load from R and putting it on B phase. May 24, at Premium Membership Get access to premium electrical guides, technical articles and much more! June 17, at 8: July 13, at 5: Does the downstream transformer vektor groups transfodmer an effect on fault currents. Email required Address never made public.

September 27, at 7: June 12, at 4: That means the LV of two transformers will never be connected in parallel. May 6, at Facebook Email Twitter LinkedIn.

Vector group – Wikipedia

trasformer July 16, at 1: Why it does not have Yy4 lagging? He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India.

Please help improve this article by adding citations to reliable sources. Jignesh, Just to remind that reply to my question is still awaited.


Phase shift shall be 0 Deg. March 29, at What will be vector group for that. Thank you so much Jignesh sir, For sharing good article.

Vector Group of Transformer | Electrical Notes & Articles

Facebook Linkedin Google Plus Twitter. Thanks Sir; Could you d11 me for my case. Articles needing additional references from January All articles needing additional references.

Please fix these I have had two people this week give me wrong vector diagrams because they copied your errors. Dear jignesh brother, Your electrical notes are very very helpful.

The positive effect and other characteristics of transformers of certain vector groups on the mitigation of voltage sags. The answer will be useful for us to design.

May 3, at This means that a 3-phase transformer can have its primary and secondary windings connected the same delta-delta transfomrer star-staror differently delta-star or star-delta.

July 13, at From the Vector group YznII of a particular transformer, how would you know that the Ratio test on the HV side of a transformer has failed?