[time-nuts] 60 Hz measurement party
djl at montana.com
Sun Jun 26 05:11:47 UTC 2011
Now you can get true three phase delta, with speed control, from single
phase 220, non rotary. With wise buying, I got one to run a 1 hp mill
motor for around $100 inflated rasbuckniks.
> I wish we had three phase everywhere, including our homes. If one wants
> run anything like a lathe or mill of any size, we have to use
> or starters (static converters). When I had my shop, I contacted AEP
> installing three phase, and the cost of the transformer bank alone was
> enough for me. I installed a rotary converter, which I home-brewed, made
> from a surplus 25 Hp, 3 Ph. motor, and a 120 volt, 1 ph. pony motor to
> start it rolling. The so-called static converters are nothing but a
> using capacitors, and when they drop out, you lose 1/3 of the power you
> should have from the motor. The other route, you pick up the third phase
> from the converter motors winding.
> *********** REPLY SEPARATOR ***********
> On 6/25/2011 at 7:04 PM Hal Murray wrote:
>>magnus at rubidium.dyndns.org said:
>>> It could be interesting just to monitor the phase of the L1, L2 and
>>> phases of the house. :)
>>Is 3 phase standard in (some/most/?) European homes?
>>In the US, houses and small businesses get 120/240. That's 3 wires,
>>single phase, center tap, with the center called neutral and connected
>>earth/ground. High power things like stoves and dryers run on 240.
>>things like lights and TVs run on 120. As long as the 120 load is
>>there is no current in the neutral so the losses in the line from pole
>>house are based on a 240 load rather than 120. (1/4, for the same size
>>You have to use a lot more power than a typical house to get 3 phase.
>>are PG&E's rules:
>>These are my opinions, not necessarily my employer's. I hate spam.
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