×
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

Touch voltage calculation

Touch voltage calculation

Touch voltage calculation

(OP)
Hello my friends,

I am struggling to calculate touch, step and GPR according to IEEE std 80, 2000.

soil resistance: 2500 OHM*M
fault current : 10kA
current division factor : 20%

Can I calculate standard and calculation values above without using software ?
The result is quite strange to me, I am wodering now. While calculating, I do not how to figure out surface layer deration factor(Cs), irregularity factor(Ki=0.644+0.148n). What is the differnce rho and (rho)s in the Cs equation. Is Ki equation only one?

Thanks
James

RE: Touch voltage calculation

(OP)
Hello 7anoter4

Thank for your great information. It was very useful to solve my problem.

James

RE: Touch voltage calculation

(OP)
Hello friends,
After calculating the step and touch voltage, the touch is higher than step voltage. As far as I know, step voltage should be higher than touch voltage. What am I missing now?
I highly appreciated if you comment about that.

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