×
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

Grounding Bank

Grounding Bank

Grounding Bank

(OP)
I have a 34.5 kV line that runs a long way in an ungrounded wye configuration.  There is no neutral, untill it reaches a substation that consists of a few sets of air break switches, a recloser, and a grounding bank of transformers.  I do not understand how the grounding bank (which I assume is a set of transformers that connects the neutral through the windings to ground) reduces neutral impedance, or if that is even its purpose.  This seems like it would add impedance to the grounding system.... Can anyone help clarify this for me? Any feedback would be greatly appreciated.

Brian

RE: Grounding Bank

Ground transformer is used to provide a source of ground fault current during line to ground faults, limit the magnitude of transient overvoltage when restriking ground fault occurs and permit the connection of phase to neutral load. There are several type of ground transformer such as Zig-zag and grounded neutral wye delta. They provide low impedance path for zero sequence current during unbalanced fault but present a high impedance for three phase load current. It is easy to find related information about ground transformer by seaching on the internet

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