Bill,
1kHz would be about as high to take it as you may have to go to a different
grade of iron in the transformers which would cost more on the pound. I know
the power companies look at that cost in paticular. However, using 1kHz would
drop the core size of a transformer signifigantly. Motor frames would come down
in size also for the same HP. As frequency rises, the amount of iron drops.
Best,
Will
*********** REPLY SEPARATOR ***********
On 11/18/05 at 8:52 AM Bill Turner wrote:
>You have all indulged me regarding my quest for the safest way to do
>120/240 volt wiring and I appreciate that.
>
>Looking ahead to the distant future, here is something I would like
>everyone, including the NEC, to consider: Shockproof houses.
>
>It is well known that the human nervous system does not sense an
>electric shock if the frequency is high enough. Most of us have
>received "RF burns" at some time in our ham careers and perhaps most
>of us have marveled at the fact that even though it burns the flesh,
>it does not shock at all. The implications for eliminating death by
>electrocution are obvious.
>
>The technology already exists for houses to be wired with relatively
>high frequency electricity. While the national electric grid should
>remain at a low for reasons of efficiency, there is no reason, other
>than cost, why houses should use such a dangerous frequency. Given
>mass production, a solid state frequency converter could be built
>into every house to change the 50/60 Hz source to a frequency not
>dangerous to humans. Perhaps something around 1 kHz would do, or even
>higher. Research would have to be done to find the optimum.
>
>In addition to the shockproofing, other advantages exist too. For
>one, transformers in equipment could be made tiny by comparison to
>50/60 Hz versions, saving money, raw materials and reducing size and
>weight. The need for a "safety ground" would be eliminated, although
>a ground might still be needed to prevent RF burns, depending on the
>equipment, but it would no longer be a safety issue. Even this could
>be handled by going back to the two-wire polarized plug where one
>conductor is grounded. If that plug were miswired, it would be only
>an annoyance, not a hazard, and easily corrected.
>
>I realize there would be lots of opposition to this new system,
>mostly on cost factors, but think of a house where nobody would ever
>be electrocuted. I believe someday it will come to be.
>
>Comments welcome.
>
>73, Bill W6WRT
>
>
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