Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Tool Talk Discussion Forum

Re: Basic AC Power Systems

[Show Entire Topic]  

Welcome Guest, Log in or Register
Author  [Modern View]
John T

04-24-2013 10:49:18

Report to Moderator


You ask "What was the advantage to this type of floating distribution system?"

Okay, these were sort of before my time, (I always speecified a Grounded system in all my years) but I have been "told" one advanatge in the early days of manufacturing was they didnt want a plant or production line to shut down if a ground fault occurred so with a "floating" non grounded system the machines and assembly line kept in production with a single ground fault. Also in a pure floating system theres "theoretically" zero voltage with respect to mother earth and zero voltage with respect to the machines or metal or conduit etc. in the vicinity. The Voltage is ONLY with respect to line to line NOT any line to earth or other metal or machines.. HOWEVER due to mutual inductive coupling and capacitance the farther away from the source and more wire runs etc the more voltage there can be developed albeit low energy.

NOW NO WARRANTY ON THIS maybe some old timer electricians and plant managers can expand on this but the above is what I was told and also is supported by the theory at least behind a floating system. In a floating system they can use detectors to sense if a leg is shorted that way they can fix it before a second leg shorts also YIKES Maybe some plant men and sparkies can comment on the advantages of the floating Delta also BECAUSE I NEVER USED THEM.....
and just arent familair with all their advantages. My Deltas had one transformer center tapped which I grounded and when I did design a 3 wire delta I still grounded one corner.

John T

[Log in to Reply]   [No Email]
Dusty MI

04-24-2013 11:35:55

Report to Moderator
 Re: Basic AC Power Systems in reply to John T, 04-24-2013 10:49:18  
John, you got half of it. They didn't want to shut production.
There are/were indicator lights on the electric buss. So if one leg did go to ground the lights would indicate there was a short, and it could be repaired when production was not running.


[Log in to Reply]  [No Email]
John T

04-24-2013 13:11:26

Report to Moderator
 Re: Basic AC Power Systems in reply to Dusty MI, 04-24-2013 11:35:55  
Thanks Dusty my sparky friend (the guy with the AC Hat at Flywheelers), yep I mentioned the warning indication but it was so good to hear a confirmation of what I had been told as I lack expreience on those floaters......Even though theres such low energy from capacitance or inductance induced voltage way down the lines, I bet a guy could feel a tingle if he got across one line and say a machine or other conductive object way out in the plant somewhere???

Thanks for your help

John T

[Log in to Reply]  [No Email]
[Show Entire Topic]     [Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2016 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters