[time-nuts] 60 Hz measurement party

Don Latham 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.

Will Matney
> I wish we had three phase everywhere, including our homes. If one wants
> to
> run anything like a lathe or mill of any size, we have to use
> converters,
> or starters (static converters). When I had my shop, I contacted AEP
> about
> 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
> starter
> 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.
> Best,
> Will
> *********** 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
>>> L3
>>> 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,
>> 240
>>single phase, center tap, with the center called neutral and connected
>> to
>>earth/ground.  High power things like stoves and dryers run on 240.
>> Most
>>things like lights and TVs run on 120.  As long as the 120 load is
> balanced
>>there is no current in the neutral so the losses in the line from pole
>> to
>>house are based on a 240 load rather than 120.  (1/4, for the same size
> wire)
>>You have to use a lot more power than a typical house to get 3 phase.
> Here
>>are PG&E's rules:
>>  http://www.pge.com/tariffs/tm2/pdf/ELEC_RULES_2.pdf
>>These are my opinions, not necessarily my employer's.  I hate spam.
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"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell

Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304

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