Read 6 answers by scientists with 1 recommendation from their colleagues to the question asked by Parth Panchal on Feb 11, The vector group designation indicates the windings configurations and the difference in transformers connected in parallel must have the same vector group. The Dyn winding vector groups do not allow zero sequence currents (commonly known as earth fault current) to pass across the transformer. Thus, the yn side of.

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

In a three-phase power system, it may be necessary to connect a three-wire system to a four-wire system, or vice versa. Is there any constraint in Yy0 configuration? June 20, at 5: When we try connect different transformer in parallel. Deepak Nov 18, November 4, at 4: I request to you, please trahsformer that point. May 6, at 7: Views Read Edit View history.

Vector group – Wikipedia

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According to the Lenzt law the polarity of the secondary winding should not be as such as to oppose the change in flux in primary?

Also what does this mean: The phase windings of a polyphase transformer can be connected internally in different configurations, depending on what characteristics trxnsformer needed from the transformer. March 12, at 9: I have one straight but not so simple question.

I have a question about the transformer polarity.

July 23, at 2: The vector group provides a simple way of indicating how the connections of a transformer are arranged. Email Please enter a valid email id.

Proud to be an IndiBlogger electricalnotes. March 12, at 5: March 27, at 2: Chet Ram Yadav May 16, Dy1, Yd5 etc on asymmetrical faults and especially as regards one-phase-to-ground faults, which are the most frequent faults. With this configuration, earth fault protection is possible and practical. Edvard Jun 03, But I want to know about the test methode and voltage relation of different type vector group.

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Transformers connected in parallel must have the same vector group; mismatching phase angles will result in circulating current and other system disturbances.

Why DYN11 vector group used in Distribution transformer?

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. August 13, at 1: How to find out Different vector group?

The transformer vector is Yd Can u advise how to check Power theft of consumers by the vevtor companies. What do you mean by neutralizing the load angle between 11 and 1?

Probably your supply must be going 1. I am creating a page about the transformers principle here http: This helpful for all electrical engineer. Shayaque Safi Feb 16, The transformer is a stand alone and is NOT in parallel with any other device. Vsctor 2, at