Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: %Z ?

  1. #11
    Join Date
    Feb 2003
    Location
    New York, 40.7514,-73.9925
    Posts
    4,580
    During transformer construction, the manufacturer has a design goal for impedance. ANSI allows for some tolerance in the final result from the design goal # and I think it is 10% plus/minus.

    They would put the tested impedance value on the nameplate, but there are times when you only know the goal value, or only an estimated value (many will guess at 2% for small utility XFMRS and 5.75% for larger), so you take a worst case estimate, which would include a -10% impedance adjustment too.
    Ron

  2. #12
    Join Date
    Jul 2006
    Location
    San Francisco Bay Area, CA, USA
    Posts
    8,120
    Quote Originally Posted by electrofelon View Post
    Wow that is some transformer. Going to have to ponder how they get 2008y/120 voltages
    FM...
    __________________________________________________ ____________________________
    Many people are shocked when they discover I am not a good electrician...

  3. #13
    Join Date
    Jan 2009
    Location
    3 Hr 2 Min from Winged Horses
    Posts
    15,762
    Quote Originally Posted by electrofelon View Post
    Wow that is some transformer. Going to have to ponder how they get 2008y/120 voltages
    I have no clue, I just snagged the pic off Google.
    "Electricity is really just organized lightning." George Carlin


    Derek

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •