×
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

Typical X/R ratio

Typical X/R ratio

Typical X/R ratio

(OP)
I try to simulate a small industrial network using ELPEK software. For the source I have value of short circuit current. But for defining a feeder internal R and X are required and I haven't r/x ratio. I am looking for advice regarding typical values. I know they will vary, but I should start from somewhere.
This problem appears every time I have to simulate  some network. Usually the only information available from the customer is short circuit power or current.

------------------------
It may be like this in theory and practice, but in real life it is completely different.
The favourite sentence of my army sergeant

RE: Typical X/R ratio

(OP)
Thank you Slava. I am on 6 kV side, so I will start with x/r=2 , it should be sufficient for the first approximation.
Source is 110/6,3 kV, 125 MVA power transformer, supplied through very short 110 kV line from a big system substation 400/110 kV.

------------------------
It may be like this in theory and practice, but in real life it is completely different.
The favourite sentence of my army sergeant

RE: Typical X/R ratio

Hi.
For this trafo see following data:

RE: Typical X/R ratio

Thanks for the tables Slava.
Respectfully

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