-------- Original Message --------
Subject: Re: [TowerTalk] Power Distribution
Date: Sat, 07 Aug 2010 23:52:46 -0700
From: Larry McDavid <lmcdavid@lmceng.com>
Organization: LMC Engineering
To: jimlux <jimlux@earthlink.net>
"NO good reason to have 3-phase power...?" I believe my 72,000 BTUs of
air conditioning would be more efficient if the Freon compressors were
operated on 3-phase power. If 3-phase power were installed at the time
of construction, the incremental cost would be minor.
In my case, I have three VFD controllers generating 3-phase power for
machine tools in my home shop. I would not need these if my home were
supplied 3-phase power. I have underground electrical service and on my
short street there are two underground transformers supplied with
3-phase power (9.6KV, I think). It would have been simple to provide
3-phase underground drops to each home when originally built.
I have a friend in The Netherlands who tells me that his historic home
has always had 3-phase power and that every motor-driven appliance
operates on that 3-phase system, including even his electric garage door
opener! I find that to be quite progressive.
Just because you *can* operate capacitor start/run induction motors on
single phase does not mean that is the best way.
Larry W6FUB
jimlux wrote:
> Jim Brown wrote:
>> On Mon, 2 Aug 2010 12:13:06 -0500, Tom Ed Moore-k5bm wrote:
>>
>>> deally it would be great to have true 3 phase to the shack and I do not
>>> mean open Delta which sucks.
>> There is NO good reason to have 3-phase power for anything but a big
>> motor.
>>
>
> Or if you want to run a 6 pulse/12 pulse rectifier to reduce the ripple
> without needing a lot of energy storage in the filters..
--
Best wishes,
Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
--
Best wishes,
Larry McDavid W6FUB
Anaheim, CA (20 miles southeast of Los Angeles, near Disneyland)
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