ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Mourning the death of this forum!
by BigB - 04/06/20 06:15 PM
uk electrical trainee to usa quals
by simonbradley - 04/05/20 09:38 AM
SBA & Paycheck Protection Program
by gfretwell - 04/04/20 09:00 PM
Hi-Vis madness
by Trumpy - 04/03/20 12:44 AM
All this testing and tagging stuff?
by dsk - 04/01/20 02:28 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (dougwells), 11 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
900kV Too Spooky? #129097 07/24/04 12:45 AM
Joined: Feb 2004
Posts: 7
A
atwater_kent Offline OP
Junior Member
Several years ago, Niagara Mohawk had an exhibit building at the Erie County Fair (Hamburg NY). On display were various types and sizes of high tension insulators. The guide explained high voltage power transmission-- generalizing, of course. He did mention the set of 450kV lines that run the length of New York State are the highest voltage lines in use in North America (circa mid-1990's). He did say that NiMo built an experimental 900kV line near Syracuse NY, but the line was never energized, not even as a test. I want to know why? Was the whole thing just impractical because the 450kV lines are doing a fine job? Or did they fear something Tesla-onian might happen at such a hyper-voltage? E-mail inquiries to NiMo have gone unanswered.

Tools for Electricians:
Re: 900kV Too Spooky? #129098 07/24/04 10:40 PM
Joined: Apr 2002
Posts: 2,527
B
Bjarney Offline
Moderator
There are several 1,000kV {one megavolt} DC lines in routine service on the North American continent. The upper end for 60Hz is generally 1,200kV AC (UHV class) but not considered technically [and economically} practical.

For 60Hz, the functional maximum in IEEE Standard 1312 is 800kV {3ΓΈ} with a nominal rating of 765kV (EHV class - includes 345 and 500 kV).

Re: 900kV Too Spooky? #129099 10/15/04 06:43 PM
Joined: May 2003
Posts: 26
I
Ichabod Offline
Member
Georgia has had 500 kv transmission lines since about 1972, so I think the NiMo source is incorrect.

Re: 900kV Too Spooky? #129100 10/15/04 08:32 PM
Joined: Feb 2004
Posts: 7
A
atwater_kent Offline OP
Junior Member
I'm not questioning whether or not lines in excess of 450kV are in use. I'm just amazed at NiMo's abandonment of the project. What were their reasons?

Re: 900kV Too Spooky? #129101 10/21/04 02:01 AM
Joined: Sep 2003
Posts: 200
U
u2slow Offline
Member
500kV in use up here in BC, Canada... since 1968 [Linked Image]
http://www.bchydro.com/info/system/system15244.html


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Joe Tedesco
Joe Tedesco
Boston, Massachusetts USA
Posts: 2,749
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 30
Popular Topics(Views)
264,627 Are you busy
199,498 Re: Forum
188,490 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3