Re: Relays and Contactors

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

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
> 
> 
>