Quote:
Originally Posted by zane
And with all the know-how here I had to inquire.
I have had magnetism trouble with 400hz, but I have no
experience in the lower hz levels.
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To a first order approximation, a transformer rated for 120V @ 400 will do (60/400)*120v=18V at 60Hz. Probably not too many uses for a 18V primary transformer
But at the same way, the 120V 25Hz transformer could do (60/25)*120V=288V at 60Hz, assuming the insulation on all high voltages are up to handling it. Had a class in this back in the mid 70's in my BSEE major at Syracuse Univ. Some industrial environments actually have power at 277V @ 60Hz (480V delta would be 277V Y (3 phase)). Maybe that's where 277V came from, power companies making use of 25Hz transformers at 60Hz...