Sequence Diagram For a Transformer

Click For Summary
SUMMARY

The discussion focuses on the accuracy of sequence diagrams for transformers, specifically diagrams #5 and #6, which are identified as incorrect. The user asserts that the first diagram should depict the a1 switch as open at delta configuration, while the second should show it closed at star grounded. The correct terminology for these diagrams is "zero sequence diagrams for a transformer," and the method to verify their accuracy involves conducting a short circuit test with zero sequence voltage applied.

PREREQUISITES
  • Understanding of transformer configurations (delta and star)
  • Knowledge of zero sequence diagrams
  • Familiarity with short circuit testing methods
  • Basic electrical engineering principles
NEXT STEPS
  • Research zero sequence analysis in transformer applications
  • Learn about performing short circuit tests on transformers
  • Study the implications of switch configurations in transformer circuits
  • Explore the use of sequence diagrams in electrical engineering
USEFUL FOR

Electrical engineering students, professionals working with transformers, and anyone involved in analyzing transformer performance and configurations.

jaus tail
Messages
613
Reaction score
48

Homework Statement


I think two diagrams are wrong here. I've marked in red.[/B]
upload_2018-1-28_19-33-30.png


Homework Equations


Do you also think the 2 diagrams are wrong? I think for 1st red circle, at delta-- the a1 switch should be open
whereas for second red circle at star grounded-- the a1 switch should be closed.

The Attempt at a Solution


I found this in book and am not sure if book is right or wrong.
 

Attachments

  • upload_2018-1-28_19-33-30.png
    upload_2018-1-28_19-33-30.png
    22.4 KB · Views: 1,881
Physics news on Phys.org
First of all, this should be titled as zero sequence diagrams for a transformer.

You are correct for diagrams #5 and #6. One way to determine this is to examine what you get when you perform a short circuit test with zero sequence voltage applied.
 
  • Like
Likes jaus tail
magoo said:
One way to determine this is to examine what you get when you perform a short circuit test with zero sequence voltage applied.

I don't know this method. I just remembered the formula. If there is ground in star the connect series switch. If there is delta then connect shunt switch.
 

Similar threads

  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 17 ·
Replies
17
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 17 ·
Replies
17
Views
6K
Replies
5
Views
3K
  • · Replies 8 ·
Replies
8
Views
3K
Replies
1
Views
2K
  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
0
Views
2K