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Old 8th June 2003, 09:31 PM   #1
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Default Would these transformers be of any use to me? :D

3 PHASE TRANSFORMER: This transformer is sealed and built to military specs. Primary winding: 208V +/- 10%, 50/60/400 Hz +/-5%; Secondary winding: 45 @ 25A, 25 @ 1A.

I'm not sure what makes it a 3 phase if the input is only 208volts... Would I be able to run this off of 240volts single phase mains? its pretty chunky and I would need 2 of the.. lol but at only $22 each they could be usefull for a super duper amp... (yes, still planning it... lol) 12kgs each... any ideas? any good? and whats with the 50/60/400Hz thing?

someone please help me... THANX!!

Guess how much they cost..... (Australian $$)
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Old 8th June 2003, 11:04 PM   #2
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Usefull only if you have 3 phases at home with correct voltage otherwise almost useless.
If you use those on single phase you will use only one winding and there will be no use for the two other windings.
I you have three phase at home you can build a very powerfull supply with low ripple without use of heavy capacitor.
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Old 8th June 2003, 11:09 PM   #3
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Quote:
Originally posted by audiofan
Usefull only if you have 3 phases at home with correct voltage otherwise almost useless.
If you use those on single phase you will use only one winding and there will be no use for the two other windings.
I you have three phase at home you can build a very powerfull supply with low ripple without use of heavy capacitor.

Well... I don't have 3 phase at home... Perhaps I should consider it? Is that possible? lol how much would it cost? So, this transformer has three 208volt primaries? what voltage is 3 phase? I thought it was like 400... hmm, anyway.. thanx for teh help..
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Old 8th June 2003, 11:15 PM   #4
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Hm, considering the weight they might make excellent door
stops.
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Old 8th June 2003, 11:16 PM   #5
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i have 3*230V. i would like to have transformers like that.
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Old 9th June 2003, 04:45 AM   #6
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Quote:
Originally posted by till
i have 3*230V. i would like to have transformers like that.

well, you ain't getting any.. THERE ALL MINE!!! MUHAHAHAHA!!! I WANNA BE ABLE TO USE THEM!!!!! can I get 3 phase electricity connected to my house? please!!!!

Okay.. I'll tell you.. they only cost $22 Australian each.... not bad..... except I have no way to use them... lol second hand of corse.. lol I WANNA BUY AND USE SOME!!!!
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Old 9th June 2003, 05:12 AM   #7
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Interesting. I know an audiophile here on Vanc. Island who used to have a pair of Gradient CAT/MRI amplifiers from the hospital that he used in his system. Each amp was one channel and rated for 10kW. The amps also needed three phase power. So what did this insane person do? He payed $10k to get 3phase installed at his house when he was living on Pender Island. Apparently they were nice amps, I guess so if they needed 3phase and weighed 2000lbs each amp... lol...

I wonder what it will cost you to get 3phase service installed?
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Old 9th June 2003, 05:46 AM   #8
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10,000watts? hmm... lol...
Well... I am not aiming quite that high... lol
I could just buy the transformers, make the amps, and then sell them... buts its only 45volts... thats like 65volts DC.... and its not enough.... unless I do a bridge amp.... ahh, what am I saying... I have no money.. anyone else is Australia wanna buy some transformers?
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Old 9th June 2003, 09:00 AM   #9
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Yeah, needless to say, the transformers in these amps were probably bigger than most car engines. Solid iron, that must have been very difficult to move!
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Old 9th June 2003, 10:39 AM   #10
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Unless you are in the process of building a new house, having 3 phase power installed will probably cost far too much.
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