×
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

Auto- transformers phasing

Auto- transformers phasing

Auto- transformers phasing

(OP)
   My background, I'm a superintendent for a REC in NW Oklahoma. We recently built a new 3 Ø line, 1/0 acsr. This is for a 2 way feed between the Fargo substation and the Gate substation. It would not phase in, 30 degrees angular displacement. Ø to Ø voltage is North Ø to North Ø 7200 volts, North to Center Ø 15,100, North to South Ø 7800 volts. The other phases were about the same. My question is where is the 15,100 volts coming from. This is a 12.4/7.2 line. Thank you, Bob

RE: Auto- transformers phasing

At 30d you should be seeing voltages of around 3700 to nearby phases. Looks to me like you are 60d out. This places some possible measurements at 180d, so you'd see 14800 nominal.

You'll need to roll phases on both sides of the transformer feeding the new line to get it to phase.   

RE: Auto- transformers phasing

(OP)
   Update on the phasing of the 2 subs,substation guys switched the high side and low side. The 2 subs phase in now. I've another question, they switched another sub, the voltage 1200 volts, Ø to Ø on the 3 Ø. The sub people said it would be ok to heat this up, we did and it was ok. Is this not alot of voltage. Thank you, Bob                                                                                                     

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