×
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

How can I calculate the positive, negative and zero impedance values
3

How can I calculate the positive, negative and zero impedance values

How can I calculate the positive, negative and zero impedance values

(OP)
If I have got the standard manufactures data for a cable. How can I calculate the positive, negative and zero impedance values?

Typical data given includes:

Maximum AC resistance - µOhms/m
Reactance - µOhms/m
Impedance - µOhms/m
Maximum capacitance - pF/m


Any help would be much appreciated

Thanks

RE: How can I calculate the positive, negative and zero impedance values

Strongly suggest you take a look at the kerite cable web site. The last time I looked the +,-,0 sequence data was given for each cable.
If you need to actually calculate these valuec then look for a good book on symetrical components.

RE: How can I calculate the positive, negative and zero impedance values

The positive and negative sequence impedances of a cable are the same.  The zero sequence will depend on the cable and shield configuration.

You should be able to get this information from the cable supplier.  Otherwise, you will need to refer to reference text on developing sequence impedances of a cable.  

IEEE Red Book or Buff Book should be of help.

RE: How can I calculate the positive, negative and zero impedance values

This information is usually available from the cable supplier.  If you really want to calculate it yourself, an excellent reference is the Westinghouse "Electrical Transmission and Distribution Reference Book."  

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