×
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

690V 50Hz

690V 50Hz

690V 50Hz

(OP)
I am looking at a project in Mongolia where the voltages appear to go from 230V 1 ph, 380 3 ph then to 690V 3 ph with distribution at 10.5kV Of interest 690 V for >200 kW.
690 V appears to be 400xroot3 indicating a 400V motor winding in star rather than delta.
Is 690 V a common Non US voltage? IEC perhaps?
International drive manufacturers appear to list it as do foreign motor manufacturers.
Any comments

RE: 690V 50Hz

Common in some applications, such as undergound mining where distribution distances can be great. Higher volage = lower current = more distance out of a given wire size.

"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more." Nikola Tesla

Make the best use of Eng-Tips.com
Read the Site Policies at FAQ731-376

RE: 690V 50Hz

Many industrial installations in Europe have 690 V isolated (IT) with no neutral. It is the standard used for most new paper mills where many drives are in the 1+ MW range.

The former 500 V system is not used much any more. The 690 V systems have been around for more then ten years and seem to replace the earlier 500 V IT systems.

Gunnar Englund
www.gke.org

RE: 690V 50Hz

Many wind turbines generate at 690V.

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