×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Power transformer with multi winding design

Power transformer with multi winding design

Power transformer with multi winding design

(OP)
Hello,

I refer to high voltage power transformers (step down) used to feed machinery equipment (rated 16 MW power) ;
My question relates to the multi-winding arrangement of the transformer;

When the turn ratio is changed (say going from 1:3 turn ratio initial configuration to 1:6 turn ratio) what are the pros and cons in terms of reliability of the transformers as the turn ratio is changed ?

What are the parameters for which the design would become more stringent as I keep on changing the turn ratio, particularly by increasing the number of windings at the secondary, e.g. from turn ratio 1:3 to 1:6, keeping the number increasing ?

Thanks

ps: excuse my ignorance on the subject.

"If you want to acquire a knowledge or skill, read a book and practice the skill".

RE: Power transformer with multi winding design

In the practical world, 11,000/433 V (i.e; ratio = 25.4) or 33,000/433 V (i.e; ratio = 76.21) are commonly used ratios. Even though the transformation ratio appears to be high. But 220 kV/3.3 kV (i.e; ratio = 66.67) is not a normal ratio. 220 kV/132 kV (i.e; ratio = 1.667)is a commonly used ration.

The transformation ratio is almost standardised for the power distribution system. Is is the parameter of voltage class, power (MVA or kVA) and the standard practice.

Your question of 1:3 ratio is typical of 33 kV/11 kV (i.e; ratio = 3).

Hope it helps you.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources