×
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 Resistor w/downstream regulators

Grounding Resistor w/downstream regulators

Grounding Resistor w/downstream regulators

(OP)
I have a question about metering PT's at an industrial substation, 115-13 KV, with two 12 MVA, delta-wye transformers that are grounded through 35 ohm resistors.

The power supplier says their normal practice grounding the metering PT's through the grounding resistor.

These makes me very nervous since I think we would see a large voltage buildup during a fault or severe unbalance.

Another power supplier says that they simply connect the PT's directly to ground.

What's your opinion.

Thanks,

RE: Grounding Resistor w/downstream regulators

I would think that you would have to use two-bushing VTs for a wye connection and connect the neutral point to the neutral to get a true meter reading.  Either that or connect them delta.

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