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#163036 - 04/29/07 05:16 PM Old Ballast  
Admin  Offline

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Joined: Oct 2000
Posts: 3,460
NY, USA
Quote
I thought I would post this vintage piece of equipment I pulled out of a friends house just before Christmas. when it was removed the fixture DID operate! If you notice on the sticker it was also made right here in this very same city I live in as well.

A.D (Rewired)

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#163045 - 04/29/07 08:03 PM Re: Old Ballast [Re: Admin]  
LarryC  Offline
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
You can tell it was made for the Niagra Falls area. Who else produced 25 hertz power?


#163046 - 04/29/07 08:24 PM Re: Old Ballast [Re: LarryC]  
frenchelectrican  Offline
Member
Joined: Feb 2003
Posts: 939
Wi/ Paris France { France for ...
Jezzz that is big sucker there i am sure that weight in pretty good in iron wise i dont recall to see the 25 HZ ballast for quite a while whistle

Merci , Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)


#163057 - 04/29/07 11:31 PM Re: Old Ballast [Re: frenchelectrican]  
yaktx  Offline
Member
Joined: Feb 2003
Posts: 288
Austin, Texas, USA
There were lots of places with 25Hz power. But driving a fluorescent at that frequency? Ouch! Gives me a headache just to imagine it!


#163066 - 04/30/07 05:11 AM Re: Old Ballast [Re: yaktx]  
32VAC  Offline
Member
Joined: Jun 2004
Posts: 202
Alice Springs, NT, Australia
Didn't the Pensylvania (spelling?) Railroad use 11000VAC 25Hz for powering those big GG-1 electric locomotives? There was a steel mill that also used 25 Hz supply for the equipment (the name Bethlehem rings a bell-on the eastern side of the U.S.)


#163081 - 04/30/07 12:04 PM Re: Old Ballast [Re: 32VAC]  
jdevlin  Offline
Member
Joined: Aug 2002
Posts: 402
welland ontario canada
Sir Adam Beck in Niagara Falls still has 25 cycle generators. They have several industrial customers on both sides of the border that use it. I think they are trying to phase it out by not renewing the contracts as they expire.


#163084 - 04/30/07 01:25 PM Re: Old Ballast [Re: jdevlin]  
Albert  Offline
Member
Joined: Aug 2006
Posts: 76
Falls Church, VA
Here's a great article, titled "The Frequency Changer Era", that discusses 25-cycle power:
http://services3.ieee.org/organizations/pes/public/2003/sep/peshistory.html


#163113 - 05/01/07 07:37 AM Re: Old Ballast [Re: Albert]  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
If you do a search on frequency, 25Hz etc. you'll find several threads where we've discussed the use of 25Hz in the past, and the fact that a few places in the U.S. once used 50Hz (e.g. Los Angeles area up until the 1930s).

One other thing I note about that ballast is the nominal voltage rating: 118V instead of the more usual 117V.


#163144 - 05/02/07 06:28 AM Re: Old Ballast [Re: pauluk]  
Kenbo  Offline
Member
Joined: Apr 2006
Posts: 233
Scotland
I allways thought that in lighting any frequency bellow 50Hz a flicker was noticable by the human eye?


der Gro├čvater

#163145 - 05/02/07 07:13 AM Re: Old Ballast [Re: pauluk]  
LarryC  Offline
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
Originally Posted by pauluk

One other thing I note about that ballast is the nominal voltage rating: 118V instead of the more usual 117V.


The Canadian volts are not quite as large as the US, so it takes more of them. smile


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