×
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

415 Volt 50 Hz Supply

415 Volt 50 Hz Supply

415 Volt 50 Hz Supply

(OP)
We have a small air compressor (1/2HP) 120 volt 1 phase 60 Hz.(Capacitor start) Motor is single voltage and frequency. A customer of ours wants to use this overseas where the available power is 415 volt 50 Hz. Without derating the motor what is the best and most economical way to convert the 415/1/50 to 120/1/60? Thanks!

RE: 415 Volt 50 Hz Supply

The voltage is no problem but you can't truly supply 60Hz power from a 50Hz supply without either a motor-generator set or an electronic frequency converter. The capacitor start on your motor limits you to a M-G set because it would likely damage an electronic converter. This will be relatively expensive but relaible. At 1/2 HP it may be $200-300.

An alternative is to get a 415-120V transformer and go ahead and run the compressor at 50Hz. It will run at 5/6 speed which for a compressor will translate into taking longer to reach the pressure setting in your tank. It may pull more current under the same load as well, so it will run hotter and die a premature death. Then just replace the motor with a 50Hz unit of equal power. It may take years for the extra heat to damage the motor anyway.

Quando Omni Flunkus Moritati

RE: 415 Volt 50 Hz Supply

Suggestion: Consider an AC-DC-AC static (electronic) converter.

RE: 415 Volt 50 Hz Supply

When operating a 60Hz inductive device at 50Hz, you should reduce the voltage to prevent magnetic saturation.

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