Re: [CAD_CAM_EDM_DRO] 3phase & Re: 50uF + suplus motor run caps sources???

----- Original Message -----
From: "Lee Studley" <indigo_red@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Thursday, September 28, 2000 8:54 AM
Subject: [CAD_CAM_EDM_DRO] 3phase & Re: 50uF + suplus motor
run caps sources???


> Thanks Darrel,
>
> Yeah, even though it might be fun on the 4th, I agree its
not a
> good idea.
>
> BTW
> I've seen a figure of 50-70uF/HP for the motor 'start'
caps, but I've
> seen varying figures for the motor 'run' values. I know it
will be
> an empirical exercise to fine tune, but is there a
rule-of-thumb
> for these 'run' values?
>
> Some designs exclude them all together.
> I'm targeting 7.5HP and 10HP idler motor. (got a deal on 2
motors)
>
> -Lee
>
>
> -- In CAD_CAM_EDM_DRO@egroups.com, "Darrell"
<dgehlsen@e...> wrote:
> > From: "Lee Studley" <indigo_red@u...>
> >
> > If you put these on a 220 volt line, be ready for some
loud
> > explosions.
> > For 220 I wouldn't use less than 400 volt rated.
> > Darrell
> >
> > >
> > > I have 20 6uF run caps, but they are only 236vac
rated.
> > Is
> > > this cutting it too close? Takes up alot of space too.
> > Luckily they
> > > only cost me $19 total. Anyone need some if they dont
work
> > out?
> > >
> > > I'm using the design that has a potential relay for
> > starting.
> > > Already got that from Grainger.
> > >
> > > Thanks in advance for any input.
> > >
> > >
> > >
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