×
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

60Hz motor tested in a 50Hz grid

60Hz motor tested in a 50Hz grid

60Hz motor tested in a 50Hz grid

(OP)
Hi,
    My problem is with an asynchronous motor (4000HP, 4000V, 60Hz, 8poles). It´s being manufactured in Europe, and it´s going to be installed in Mexico. So the tests are factory will be made at 50Hz, since they do not have frequency converters in their test field.

    When doing the heat run test by the two frequency method, at least one of the synchronous generators should run at 60Hz, right?
     Does anyone know if there is a rule (IEC, NEMA, IEEE,...) that allows to test a 60Hz motor under 50 Hz conditions?

Thank you for your help.  

RE: 60Hz motor tested in a 50Hz grid

I have always understood the two frequency method to require the primary power supply to be the rated frequency of the motor. I doubt that you would get the proper results using say 50 & 40 HZ. For one thing you will be running slower which will affect the cooling. You might want to check out an IEEE paper titled "FORWARD STALL TEST, AN ALTERNATE METHOD OF ROTOR AND STATOR LOADING FOR TEMPERATURE AND VIBRATION VERIFICATION". The test it describes requires that for testing a 60HZ motor it needs to be powered by a 50HZ supply, exactly what you are looking for.  

RE: 60Hz motor tested in a 50Hz grid

(OP)
When doing the two frequency method I was thinking on maybe using a 60Hz on the primary synchronous generator and 50Hz on the secondary. I guess it could work out fine.

Anyway I will sure take a look at the IEEE paper you are refering to. And thank you for your help!

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