ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Pull out fuse panel?
by wa2ise. 12/14/18 05:09 PM
Video door bell causing chime activation of coil
by gfretwell. 12/10/18 12:35 AM
Conduit fill Calculations
by gfretwell. 12/08/18 08:39 PM
Swimming Pool question
by HotLine1. 12/05/18 12:37 PM
Tingle off the water spigot
by rmiell. 11/30/18 01:03 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 12 guests, and 22 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
900kV Too Spooky? #129097
07/23/04 11:45 PM
07/23/04 11:45 PM
A
atwater_kent  Offline OP
Junior Member
Joined: Feb 2004
Posts: 7
BUFFALO NY USA
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 09:40 PM
07/24/04 09:40 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
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 05:43 PM
10/15/04 05:43 PM
I
Ichabod  Offline
Member
Joined: May 2003
Posts: 26
Statesboro, GA, USA
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 07:32 PM
10/15/04 07:32 PM
A
atwater_kent  Offline OP
Junior Member
Joined: Feb 2004
Posts: 7
BUFFALO NY USA
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 01:01 AM
10/21/04 01:01 AM
U
u2slow  Offline
Member
Joined: Sep 2003
Posts: 200
Salt Spring, BC, Canada
500kV in use up here in BC, Canada... since 1968 [Linked Image]
http://www.bchydro.com/info/system/system15244.html


Featured:

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

 

Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
252,205 Are you busy
189,181 Re: Forum
178,861 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 14 (0.005s) Memory: 0.9676 MB (Peak: 1.1055 MB) Zlib enabled. Server Time: 2018-12-15 00:59:42 UTC