×
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

Altitude Derating

Altitude Derating

Altitude Derating

(OP)
Hello,

Are there any good references or standards for altitude deratings for switchgear? I've seen some info in IEEE/ANSI C37.20.3-2001 but that's about the only standard with altitude derating info that I have found.

RE: Altitude Derating

Manufacturers generally cover this in their literature.  You might check with your favorite vendor.  In US, I'd check with Cutler Hammer or maybe here:

http://www.powl.com/main/Uploadpdf/pv_ag.pdf

There are two issues - the dielectric rating and the continuous current rating.  The derating factors are different for each.  

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