×
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

flash in switchyard

flash in switchyard

flash in switchyard

(OP)
I am training to be an electrical engineer and I am doing my internship right now.
I need to find out what is an electrical flash over in a switchyard and how does it occur ?

Thank you if your able to reply.

RE: flash in switchyard

Learn how to used google, type electrical flashover, we expect you to figured out the simple questions.

RE: flash in switchyard

Search youtube for "high voltage arc" for some nice visuals.

A flashover can occur for a number of reasons. Mother nature (lightning, animals) are major causes. On transmission / distribution lines, conductor sag, caused by heavy loading can cause contact with trees. Insulation failure or contamination (salty air, fog, industrial pollutants). Supporting insulators can be exposed to high mechanical stresses, as the result of through faults, which can cause damage in the porcelain, which can be further damaged by moisture ingress and compounded by freezing of the water (expansion).

Switching of long lines, capacitor banks can cause transient overvoltages.

A single phase to ground fault can cause the remaining phases to rise up to 1.732 times nominal voltage, causing flashovers as well.

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