"Ignoramus23604" wrote in message
...
On 2009-02-25, Milo milo@oil wrote:
"Proctologically Violated??" wrote in message
...
Milo" milo@oil filter.hughes.net wrote in message
...
"Ignoramus31514" wrote in message
...
On 2009-02-25, Milo milo@oil wrote:
I read a lot of write ups on using capacitors to balance the 3PH out
of a
idler motor.
But, I can't find anything on using them with a 440V system.

Brief description of my set-up: (what I'm trying to run is a 5HP 440V
lathe
motor 2 speed, reversible)

I have a 110V 1PH 1.5HP pony motor, belted to a 230V 3PH 7.5HP idler
motor.
Feeding the idler motor with 220V 1PH on A & C leg, wild leg on B. A
B
& C
feed into a 440/208 auto transformer 'backwards' to boost the
voltage.

I'm having a hell-uv-a time dialing in my 440V. I have multi taps on
the
transformer, but try as I might. I just can't get 3 legs of 440. I
can
get
two, but as soon as I try to dial in the wild leg, (using the taps)
one
of
the other legs goes high or low.

How does voltage look on the 230v side?

All 3 legs are +/- 230V

So you're saying you have the rpc balanced with caps, before you add the
transformers?

What values have you used?

Also, I don't know that you need a pony motor, as I think you need caps
from A to B *and* from B to C.
To start the idler, just disconnect the B to C caps, start the idler
with
A to B caps, and then switch in B to C caps.

But, either way, if you have the rpc balanced before adding the
transformer, mebbe just experiment with add'l caps after adding the
transformer -- with the same taps for all three phases.

--

Mr. PV'd

Mae West (yer fav Congressman) to the Gangster (yer fav Lobbyist):
Hey, Big Boy, is that a wad (of cash) in yer pocket, or are you just
glad to see me??

There are no caps in the system at this time.

Peace
Milo
http://s235.photobucket.com/albums/ee67/mholroyd/



Add two caps, one on legs 1-3 and one on 2-3, start with 140 uF.

Add them after the transformer?

Peace
Milo
http://s235.photobucket.com/albums/ee67/mholroyd/