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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Please help improve this article by adding citations to reliable sources. September 27, at 7: The answer will be useful for us to design. I understood that the generator transformer vector teansformer is delta at generator side and star in yard side.

Why DYN11 vector group used in Distribution transformer?

July 1, at 8: February 24, at Parmar, While I appreciate your article on significance and selection of vector group of Transformers, pl. In such case the GSU vector group will change or not.

September 15, at The three phase transformer windings can be connected several ways. Same way is it possible to suppress 7th harmonics also. Deepak Kumar Mongia May 29, When we try connect different transformer in parallel.


Vector group – Wikipedia

How to find out Different vector group? The secondary windings are connected similarly.

transfofmer This can be done by the positive effect of transformers of vector group 1, 5, 7 and 11 e. November 4, at 4: October 11, at 9: When two transformers are connected in parallel, their phase shifts must be identical; if not, a short circuit will occur when the transformers are energized.

June 4, at 4: Introduction Three phase transformer consists of three sets of primary windingsone for each phase, and three sets of secondary windings wound on the same iron core. Moreover, it can be proved that two-phase, two-phase-to-ground and three-phase faults at the one side of such transformers give the same sag magnitude at the other side of the transformer under common assumptions used in short-circuit analysis.

I do not even know how I ended up right here, but I assumed this submit used to be good.

The UAT unit auxiliary trafo on the generator busduct tap-of is Dyn This info is realy useful because the connections of vector groups r confusing me very much but now i understand. Beny pardede Apr 16, October 31, at 3: What i need if will install synchronizer generator to bus if VT sensing transcormer before and after transformer?.


Sir, As you said: Please reply me Please reply me Thanks again. This is very helpful for people…….

Understanding Vector Group of Transformer (part 1)

Hi I was working in a project and I have seen that there are two different power transformers has been connect in parallel even they were have different primary and secondary connection. Thanks to the writer for his wonderful article. No 3rd harmonics from LV side be transferred to HV side and circulated in delta windings. Heri Sep 26, The transformer vector is Yd October 17, at 5: This is called a 30 transformed phase shift.

But I have spent much time in field of distribution.

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