[Amps] Re: Step-start calculation

[R.Measures]

Roy -- I calculated that without a step-start R, the inrush-I would be 
a bit over 1000A -- which is probably enough current to weld the 
contacts in the power contactor.
cheerz.

On Nov 20, 2004, at 5:49 AM, Roy Koeppe wrote:

> I don't like to think about it. I gives me a headache.
>
> 73,    Roy         K6XK
>
>
>  "...What would be a suitable
>  value of step-start R to limit the inrush current to 50A-rms?..."
>
>
>  In this practical & real world, it would be 4.6 ohms.
>
> Congrats, Roy.   The closest value in my junk box was 5.6½s.
>
> 2nd question:  What would the approximate inrush-I be without a
> step-start relay and resistor?
>
> cheerz
>
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org