[time-nuts] No more 60Hz! TEC Elimination

Hal Murray hmurray at megapathdsl.net
Fri Jun 24 22:13:14 EDT 2011

> Clocks is not what I'm concerned over as much as certain pieces of
> industrial equipment that must rotate at a certain speed, or are supposed
> to. Also, if they are going to allow the frequency to get slower, any motor,
> or transformer, needs more iron in it, and just a 10 Hz difference is enough
> to amount to a significant increase in iron. One can easily use a 50 Hz
> transformer on 60 Hz, but not a 60 Hz on 50 Hz. The speed difference in
> motors from 50 Hz to 60 Hz would be around 1.2%, just roughly guessing it in
> my head, at 1800 RPM, and we don't know how much they intend to allow it to
> vary.

I think you are missing the decimal point.

How do you get 1.2% from 50 to 60 Hz?  I get 16%.

The graph had events under 59.95 Hz.  That's roughly 0.1%.

These are my opinions, not necessarily my employer's.  I hate spam.

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