On Mon, 09 May 2011 00:06:29 -0700, Gunner Asch
wrote:

On Mon, 09 May 2011 01:19:57 -0400, "Michael A. Terrell"
wrote:


Gunner Asch wrote:

Ive got a 5hp PC3 vfd running my Gorton MasterMill.
The top end voltage it is supposed to run on..is 230vts + about 5 volts
It will run down to 200 volts.
Im running it on single phase, been doing it for years.

Now the power company has increased my 220 single phase to about 249
volts and when I try to start it..I keep getting OverVoltage Alarm.

I cant get the power company to change the tap down to a normal voltage,
let alone 220 volts

How do I (cheaply) transform high voltage down 14-29 volts ac?

Id hate to loose the VFD on this mill and have to run it off a RPC
(which also puts out higher voltages)


How much current do you need? A simple buck transformer will do the
job, as long as it's secondary can handle the current.

I believe its 5.7kva

Gunner

Ok...Im going to look REALLY stupid here. Sigh..blame it on the stroke.
Or not..shrug

Ive got a BUNCH of 120/240 transformers..all marked 120/240 12/24

So if I wire one up to 240..does it mean that it will REDUCE the voltage
-24 volts?

Or is the output 24 volts?

I see I havent gotten everything back from the stroke....sigh

Gunner

--
"If I say two plus two is four and a Democrat says two plus two is eight,
it's not a partial victory for me when we agree that two plus two is
six. " Jonah Goldberg (modified)