×
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

capacitor bank for transformer test

capacitor bank for transformer test

capacitor bank for transformer test

(OP)
Hello!
I would like to ask if someone knows anything about how the large - 100Mvar/ 6kV - capacitor bank used for high power transformer load test can be protected. It is a special case where this bank is used only for 5-6 hours at a time and only few times a year. Maybe someone is working in transformer producing companies where this method is used and knows more about this subject. I was thinking to divide it in several parts and use double star connection for each with unbalance relay.
Any comment is highly appreciated!
Thanks!
Pafi

RE: capacitor bank for transformer test

Using a capacitor bank for transformer testing seems quite strange for me. However, for protection you can monitor:

- the difference in voltage between the midpoints of several branches (using series connection) in parallel

- the difference in current between different parallel branches

- as considered by yourself: the difference in starpoint voltage in a double star connection

In all cases the initial difference would be small and only a function of tolerances whereas a fault would cause a large difference.

RE: capacitor bank for transformer test

Cap banks are sometimes used for the 180 hz. induced test, especially if it is a reactor.Usually the 180 hz. M-G sets are not large enough to handle this type of load.Cap banks are used to offset this high inductive loading factor.

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