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!

*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

Thermal characteristics of transformers

Thermal characteristics of transformers

Thermal characteristics of transformers

I wanted to determine the thermal characteristics of distribution transformer (IEC 354-1991, page 33).
Temperature rise test was made on 50 kVA transformer, and the following thermal characteristics were obtained:
- oil time constant;
- top-oil temperature rise;
- average winding temperature rise;
- winding gradient;
- winding time constant.

How can I determine following thermal characteristics:
- x: oil exponent;
- y: winding exponent, and
- H: hot-spot factor.

Best regards,

RE: Thermal characteristics of transformers

The factors x,y and H are already given in IEC 354 page33 ie .8,1.6and 1.1 for distribution transformers.So you need not derive it out.Using these factors and test results you can calculate the relevant parameters  resulting during operation

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close