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.

Any help appreciated

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

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?

i

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"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

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

In article ,
"Milo" milo@oil filter.hughes.net 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.

If I understand the description, the autotransformer is three phase. If
so, one can the treat autotransformer and motor as a unit, and apply the
balancing capacitors to the idler motor as if it were connected to a 220
volt 3 phase motor. Varying the taps on the autotransformer doesn't
sound right.

A wiring diagram would be useful.

Joe Gwinn

milo,
i sent you an email from catalina0029.
if you don't get it, re here and I'll send it again

On Tue, 24 Feb 2009 20:53:44 -0500, "Milo" milo@oil
filter.hughes.net 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.

Any help appreciated

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