Estimating Object-to-Ground Impedance
Estimating Object-to-Ground Impedance
Mar 19, 2012 I've done some reading of Section 7.8 of the EPRI Red Book, which provides a calculation for the induced voltage and currents, but it requires a value for the '60Hz power frequency impedance of the object to ground'. I have indeed the third edition and I found this equation 7.8-2. The impedance is actually a capacitive reactance See -in.
Hi All,
I am looking at the preliminary line route for a new transmsision line, and there is a large building that may be subject to induced voltage due to its proximity to the ROW. I want to calculate the expected induced current to determine if it will be within allowable limits.
I've done some reading of Section 7.8 of the EPRI Red Book, which provides a calculation for the induced voltage and currents, but it requires a value for the '60Hz power frequency impedance of the object to ground'.
Unfortunately, I'm a mechanical engineer, not an electrical one, so I have no idea how to find any information on the Z value for a metal-clad building that can be described as a 'half cylinder on a ground plane'.
Any help would be VERY appreciated, thanks!
I am looking at the preliminary line route for a new transmsision line, and there is a large building that may be subject to induced voltage due to its proximity to the ROW. I want to calculate the expected induced current to determine if it will be within allowable limits.
I've done some reading of Section 7.8 of the EPRI Red Book, which provides a calculation for the induced voltage and currents, but it requires a value for the '60Hz power frequency impedance of the object to ground'.
Unfortunately, I'm a mechanical engineer, not an electrical one, so I have no idea how to find any information on the Z value for a metal-clad building that can be described as a 'half cylinder on a ground plane'.
Any help would be VERY appreciated, thanks!
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EPRI Issues Updated “Red Book” – Electric Light & Power
All rights reserved www. Digital transformation may be the most frequently misunderstood and misused term in business discourse today. It’s easy to join and it’s free. Yes, the effort to read this eddition is worth. The 3rd eddition is much larger than the original one. Seminar participants also ventured afield to see, hear epri red book feel the high-voltage phenomena covered in the classroom.
Overhead Transmission: Overhead Transmission Line Reference Manual – Program 35
Also the epi edition has a software for several calculations that is worth the efort. Resources Digital transformation may be the most frequently misunderstood epri red book misused term in business discourse today.
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Wow, that table of contents seems to contain the answers that I’m presently searching for ie How to calculate the Audible noise for a non-bundled conductor Epri red book line at 66kV Epri red book.
EPRI Issues Updated “Red Book”
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Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Thank you for helping keep Eng-Tips Forums free from inappropriate posts. Named for its distinctive crimson cover, the new Red Book is not only the comprehensive go-to reference for practicing transmission engineers, it is proving to be a valuable training tool for transferring expert knowledge to a new generation of engineers that will create the transmission infrastructure bkok the future.
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I have done a search in the university library and we have the 2nd edition. Wow, that table of contents seems to contain the answers that I’m presently searching for ie How to calculate the Audible noise for a non-bundled epri red book OH line rrd 66kV L-L Red Flag This Post Please let us know here why this post is inappropriate.
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