Contact US

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!

*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

Discharge resister in Generator

Discharge resister in Generator

Discharge resister in Generator

Which discharge resister non-linear or linear will be used for 16 MW machine?

RE: Discharge resister in Generator

"Discharge" of what??
If it is Lightning Discharge, the resistors are always non-linear - resistance of the resistor stack falling rapidly once the rated voltage threshold is crossed.

RE: Discharge resister in Generator

Discharge resistor or surge arrestor?


"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

RE: Discharge resister in Generator

Maybe a neutral impedance resistor?

RE: Discharge resister in Generator

If it's a synchronous machine (generator or motor) with brushless excitation, that "discharge resistor" may be the method of limiting damage to the rotor windings in event of a stator (short circuit) fault. If that is the case, the resistance is (usually) linear over the expected operating temperature range of the resistor - which may be dramatically different from the machine "nameplate" temperature rise, by the way.

For the brushless excitation, the resistor is typically the same kind as that used to prevent condensation in air handling environments. The device is typically not finned (although it could be) and is a circuit comprised of several "strip" or "tube" type resistive elements connected in some series/parallel combination.

RE: Discharge resister in Generator

Gr8blu, You could be right that the O means Discharge resistor in generator field circuit.
Discharge resistor in generator field circuit is cut in whenever Field Contactor is open.
This is to short circuit the Generator field winding so that the stored energy in the field windings is quickly discharged.

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close