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New code for Transformers

New code for Transformers

New code for Transformers

(OP)
Hy everyone,
please, help with reference regarding the new codes for transformers such as DD and DY and so on.
Those codes show the major configuration, phase-shift and grounding on Transformers.
Thanks, NNG.

RE: New code for Transformers


You might search on “vector group” here.
  

RE: New code for Transformers

New codes? They look just like the ones that have been around for years. You examples were incomplete incidentally - there would normally be a number which indicates the phase shift between primary and secondary. The HV side is normally indicated by a capital letter, and the LV side is indicated by lower case.

For example Dyn11 indicates HV delta, LV star with the neutral terminal brought out, and a 30 degree phase shift.

Buy yourself the "J&P Transformer Book", which contains all sorts of useful information on transformers including vector groups.

There was also a discussion somewhere on Eng-Tips about this topic not so long since. Try out the search function.


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Get it over with.

RE: New code for Transformers

(OP)
Thank you, ScottyUK.
Your reference book is a good help!
The standard abbreviation seems easy for their users in UK but for others as in US it is a puzzle.
Sincerely, NNG

RE: New code for Transformers

Can someone please explain what electrical discrimination is.Cheers

RE: New code for Transformers

paulclayton1:

Please start a new threat when you are asking questions that are not related to the original question.

Discrimination is in short a method to ensure that the breaker nearest to a fault opens first. It can use either time or overcurrent, or a combination of both to achieve correct co-ordination.

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