Re: Allen-Bradley a speed controller
- 240v, single phase or 3 phase, is the RMS voltage. Peak
voltage is about 1.4 times RMS, or around 336v, IIRC. Now, if you
don't have a sine wave, the 1.4 may not be the correct factor
--- In microhydro@y..., "H.G." <garciah@f...> wrote:
> I am QUITE INTERESTED in getting info or specifications on your
> you give the model and where to get additional info like power
> frequency stability etc.
> I wonder why you have voltage spikes, it should not occur at all.
> Message: 5
> Date: Mon, 06 May 2002 11:06:43 -0700
> From: David Green <barclay@s...>
> Subject: Re:Inverters, speed controllers
> I have just bought from Allen-Bradley a speed controller that
> AC single phase into 230 volt three phase with frequency control.
> current phasing is very smooth but the voltage has spikes up to 325
> volts. I know it is backwards from what small hydro needs but
> PLC and frequency controllers seem to be programable to do about
> It sure would be easier on the small hydro owner to have programable
> controls. This unit by the way was under $400 US.