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#163036 - 04/29/07 03:16 PM Old Ballast
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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 06:03 PM Re: Old Ballast [Re: Admin]
LarryC Offline
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Registered: 07/05/04
Posts: 780
Loc: Winchester, NH, US
You can tell it was made for the Niagra Falls area. Who else produced 25 hertz power?
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#163046 - 04/29/07 06:24 PM Re: Old Ballast [Re: LarryC]
frenchelectrican Offline
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Registered: 02/06/03
Posts: 939
Loc: 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
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#163057 - 04/29/07 09:31 PM Re: Old Ballast [Re: frenchelectrican]
yaktx Offline
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Registered: 02/19/03
Posts: 288
Loc: 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!
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#163066 - 04/30/07 03:11 AM Re: Old Ballast [Re: yaktx]
32VAC Offline
Member
Registered: 06/28/04
Posts: 202
Loc: 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.)
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#163081 - 04/30/07 10:04 AM Re: Old Ballast [Re: 32VAC]
jdevlin Offline
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Registered: 08/07/02
Posts: 402
Loc: 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.
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#163084 - 04/30/07 11:25 AM Re: Old Ballast [Re: jdevlin]
Albert Offline
Member
Registered: 08/16/06
Posts: 76
Loc: 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
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#163113 - 05/01/07 05:37 AM Re: Old Ballast [Re: Albert]
pauluk Offline
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Registered: 08/11/01
Posts: 7520
Loc: 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.
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#163144 - 05/02/07 04:28 AM Re: Old Ballast [Re: pauluk]
Kenbo Offline
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Registered: 04/07/06
Posts: 233
Loc: Scotland
I allways thought that in lighting any frequency bellow 50Hz a flicker was noticable by the human eye?
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#163145 - 05/02/07 05:13 AM Re: Old Ballast [Re: pauluk]
LarryC Offline
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Registered: 07/05/04
Posts: 780
Loc: 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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