×
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

Single Phase Overhead Transmission line

Single Phase Overhead Transmission line

Single Phase Overhead Transmission line

(OP)
In a multi-grounded 7.620 kV line to ground Overhead Transmission line, what's the formula in computing voltage drop and power loss along the line? say for example the line is 3 kms using #2 AWG ACSR cable for primary line and #4 AWG ACSR cable for neutral line with 25 kVA transformer at load end.

RE: Single Phase Overhead Transmission line

Unfortunately, it's not that simple.  Voltage drop will depend on the inductance of the single phase line and this is a function of the physical construction of the line.

Also, it depends somewhat on the power factor of the load.

In addition, the load at the end is generally dependent on the voltage, so some iteration is required for an exact solution.

You should be able to get the information you need to do the calculation from the Standard Handbook for EE.  

Having said all that, a 25 kVA load isn't going to cause much voltage drop on 3km of 7620 V line.  At the full 25 kvA, your primary current is only about 3.3 amps.  This should not cause enough voltage drop to worry about.

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