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Old Ballast #163036 04/29/07 05:16 PM
Joined: Oct 2000
Posts: 3,636
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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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Re: Old Ballast [Re: Admin] #163045 04/29/07 08:03 PM
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LarryC Offline
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You can tell it was made for the Niagra Falls area. Who else produced 25 hertz power?

Re: Old Ballast [Re: LarryC] #163046 04/29/07 08:24 PM
Joined: Feb 2003
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frenchelectrican Offline
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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?)

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

Re: Old Ballast [Re: yaktx] #163066 04/30/07 05:11 AM
Joined: Jun 2004
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32VAC Offline
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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.)

Re: Old Ballast [Re: 32VAC] #163081 04/30/07 12:04 PM
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jdevlin Offline
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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.

Re: Old Ballast [Re: jdevlin] #163084 04/30/07 01:25 PM
Joined: Aug 2006
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Albert Offline
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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

Re: Old Ballast [Re: Albert] #163113 05/01/07 07:37 AM
Joined: Aug 2001
Posts: 7,520
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pauluk Offline
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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.

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


der Gro├čvater
Re: Old Ballast [Re: pauluk] #163145 05/02/07 07:13 AM
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LarryC Offline
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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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