Re: Relays and Contactors

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Richard Williams by way of Terry Fritz <twftesla-at-qwest-dot-net>" <richardwwilliams-at-earthlink-dot-net>

Hi Jack,

Was able to pick up 2 contactors (new) at $4.00 each at:
http://www.usamfg-dot-net/
Got the last 2 they had.

Specs.
Manufactured by Products Unlimited
#3100-30Q10191PM
Definate Purpose Contactor
Website: http://www.ciitech-dot-com/ciitech/catalog/catalog.asp

3100 Series - Model 98
3 pole 40 FLA (inductive)
Locked Rotor Amps -at- 240vac - 240
Resistive Amps Rating - 50
24 vac coil

Maximum load for this project is ~20 amps -at- 240 vac.
Looked at size 3 contactors but way out of my price range.

Thanks Jack!

Hey Matt D.

LOL -at- steroids!!
Thanks for the info on the difference between relays and ster......err..
contactors! :D

Rick W.
SLC



----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, February 05, 2002 11:25 AM
Subject: Re: Relays and Contactors


> Original poster: "Jack King by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<speakernut-at-yahoo-dot-com>
>
> Use a relay that is designed to switch an inductive
> load. These are designed to quench arcing problems.
>
> Watch arcing on your variac brushes too.
>
> Cheers,
>
> Jack King
> also from slc
>
> speakernut-at-yahoo-dot-com
>
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "Richard Williams by way of Terry
> > Fritz <twftesla-at-qwest-dot-net>"
> > <richardwwilliams-at-earthlink-dot-net>
> >
> > Hi list,
> >
> > Ok, I'm new at this sort of thing, high current
> > household voltages, 120vac and
> > /or 240vac.
> >
> > I plan to be able to interupt power from the mains
> > using a deadman's switch
> > controlling a relay or contactor.
> >
> > During the past I've seen arcing from connections
> > being pulled apart, or any
> > situation interupting high currents.
> > The planned current load will be 240vac -at- ~20amps
> > continuous duty. What would
> > prevent excessive arcing when the contacts open
> > under full load? Is there a
> > difference between relays and contactors in this
> > respect?
> >
> > I will be using variacs to ramp up power and back
> > down again but if the
> > deadman's switch opens at full power....??
> >
> > Rick W.
> > Salt Lake City
> >
> >
> >
>
>
>