×
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

Building Lightning Protection

Building Lightning Protection

Building Lightning Protection

(OP)
It was determine that lightning protection is required for both the yard equipment (transformer, open busses, switchgear, etc) and the two story building housing a 69 kV GIS substation.

a) What standard is suitable to use as a guideline NFPA 780 (Standard for the Installation of Lightning Protection Systems) or the IEEE Std 998 (IEEE Guide for Direct Lightning Stroke Shielding of Substations)?

b) Any issue using different methods or standard for the yard equipment and the building considering that each lightning protection are considered independently of each other.


RE: Building Lightning Protection

Most Substations these days use the rolling sphere method for the erection of lightening spires with a direct connection to ground from the base of the spire, the rolling sphere principle uses the pattern of where the lightening strikes have the most engery with an intersecting area of approximately 40m apart as best to catch the concentrated energy of the strike.
You will have to do a bit more research as the area of installation would be a major consideration as that may dictate more suitable applications.

RE: Building Lightning Protection

I would use NFPA 80 for the building and IEEE 998 for the yard equipment. You can use the building as part of the IEEE 998 protection.

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