[TowerTalk] [Fwd: Re: Power Distribution]

[Bert Almemo]

I dont' understand how anyone can argue against a 3-phase electrical
distribution system. The modern part of the world has been using it for many
decades and there is proof it's a better system. If you also put it
underground in urban areas it's safer and has less problems.

73 Bert, VE3OBU





-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Larry McDavid
Sent: Sunday, August 08, 2010 2:55 AM
To: Towertalk Reflector
Subject: [TowerTalk] [Fwd: Re: Power Distribution]



-------- Original Message --------
Subject: Re: [TowerTalk] Power Distribution
Date: Sat, 07 Aug 2010 23:52:46 -0700
From: Larry McDavid <lmcdavid at lmceng.com>
Organization: LMC Engineering
To: jimlux <jimlux at 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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