"Chris Lewis" wrote in message ...
According to TURTLE :
[My old 1HP Sears radial arm saw motor is exactly this.]
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Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
This is Turtle.
Yes, I know who it is, the from line says who.
Star Buck you got it wrong here. We are talking about HVAC compressor and not
woodworking equipment. Woodworking equipment will work
like you say but hvac compressors , the start winding will stay powered all
the time and start with a hard start kit jumping out of
the run capasitor. it give it a 440 volt shot to get it moving then cut out.
The run capasitor will stay in line on the start
circuit all during the run time.
Slow walking soup-beast, you made a very careful point of omitting
the following paragraph betwixt "My old..." and the signatu
I'm not familiar with "run capacitor" single-phase motor theory, so I won't
comment on those. [I could make some intelligent guesses, but I'll avoid
embarassing myself in front of people who do these for a living thank you
very much ;-)]
Perhaps you should spend a little more time out of your shell reading
the postings you're replying to, and/or, avoid the creative editing
of what you quote.
Now the other endless void of knownledge you give us here is nothing but 3
phase motor being run off single phase power supply. i
know of no commercial supplier that supplies such devices except for places in
Mexico where they don't have a 3 phase supply of
power, and have run 3 phase motors on single phase.
No? You don't? Perhaps you shouldn't speak about things you know nothing
about. A simple google search would help you avoid sticking one of those
claw feet in your mouth.
These are specifically for people who want to run 3-phase equipment
(perhaps an old piece of woodworking equipment they picked up at an
auction) and run it when getting 3 phase power may be prohibitively
expensive or simply not available (ie: wierd zoning codes).
Here's just three links to such units or manufacturers of such units.
1) http://www.isomatic.co.uk/3phConverter.htm
2) http://www.thomasregister.com/olc/12521753/phase.htm
3) Lists approximately another _25_ manufacturers of these devices:
http://www.motionnet.com/cgi-bin/sea...?a=cat&no=4215
#2 has 55,000 of them in the field.
Here's a couple DIY construction articles:
4) http://www.metalwebnews.com/howto/ph...er/3-phase.pdf
5) http://www.laserfx.com/Backstage.Las...seConvert.html
#5 has a good explanation of why you'd want to do this.
These devices has nothing
to do with hvac compressor in the USA
I know that. That was an _aside_.
for we have good
power supply and don't need second rate running devices to run the equipment.
Here is the states if you want more power to run your
3 phase motors we use 480 volt service and motor and you have no power
shortage at all.
Read #5 above. How much would it cost _you_ to get 3 phase into your
garage?
Another aside:
My dad routinely works with electric motors with several thousand horsepower.
Ie: imagine how big a motor you need to drive 5000GPM up a 5000 foot head?
Hint: the impeller is a 12 foot long chunk of stainless formed into 12
stages. The outlet pipe is something like 12" in diameter.
480V doesn't cut it. Some of these motors need a teensy bit more power
than is convenient for 480V. Like 40Kv.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
This is Turtle.
I have read all the bull**** about 3 phase motor and your great endless Void of knowledge of them , but We are not talking about 3
phase motors and do it yourself home 3 phase converters. We are talking about hvac equipment which you have no knowledge of and want
to empress everybody on 3 phase motor knownledge and we are talking about hvac equipment. Now you say your dad is a Bearing man for
G/E on turbine and electric motors. I'm proud of him but he is the one that works on them and not you.
Now again for your benefit here. The thread is about HVAC or Ref. equipment and not G/E Load Builders. Now i would like to ask you
what you do for a living to know if you have any back ground in HVAC / R business for i have been working in the field and run my
own company for the 40 something years. I mostly do HVAC / R systems under 60 tons or less. What do you do for a living ? I know you
will not answer but I ask anyway.
TURTLE
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