×
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

transformer impedance

transformer impedance

transformer impedance

(OP)
For a single phase, 285MVA, generator step up transformer (which is part of a 3-phase bank), 23kV - 425kV, how do I calculate the transformer impedance at the minimum and maximum taps? The transformer has an off load tap changer on the high voltage winding.  

RE: transformer impedance

You look at the test report and see what the impedances are at those taps.  It may be linear, but it may not.  There was a thread here not too long ago that you might look up.

RE: transformer impedance

(OP)
thankyou, davidbeach

RE: transformer impedance

bxny, just a general question. Why you need these impedance? Normally for SC calculation for distribution transformers I have been using %Z.

Is this for protection relay setting purpose?

RE: transformer impedance

Um... %Z is just the per unit impedance converted to a percentage - it's just a different way of expressing the same thing.

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