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Re: Relays and Contactors
Original poster: "Richard Williams by way of Terry Fritz <twftesla-at-qwest-dot-net>" <richardwwilliams-at-earthlink-dot-net>
Was able to pick up 2 contactors (new) at $4.00 each at:
Got the last 2 they had.
Manufactured by Products Unlimited
Definate Purpose Contactor
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.
Hey Matt D.
LOL -at- steroids!!
Thanks for the info on the difference between relays and ster......err..
----- Original Message -----
From: Tesla list <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>"
> 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.
> Jack King
> also from slc
> --- 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