×
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

Power converter classification

Power converter classification

Power converter classification

(OP)
The NEC considers equipment with nominal voltage less than 600V and over 600V.If we use a VFD with power converter, we have 480 VAC as the input nominal voltage, however, the system operates with DC bus voltage over 600 VDC. What should be classification of such system from NEC standpoint?

RE: Power converter classification

NEC doesn't address inside the box.  480VAC in and 480VAC out is less than 600V.

RE: Power converter classification

(OP)
Thank you David, but I did not say that output voltage is 480 VAC.This converter has a regen front end, DC bus (over 600 VDC), which is connected to DC/DC converter with output voltage over 600 VDC (this is a battery simulator).

RE: Power converter classification

As 600V.  NEC groups them as 600 Volts and Less. (It is not just less than 600V).

Rafiq Bulsara
http://www.srengineersct.com

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