Re: Relays and Contactors

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

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>

I measured the cap across a few 30 amp Joslyn clarks contact and i got
.0005uf, I cant locate any others right now?
Basically all you are after is something that speeds the contacts up
while closing, The way most contacts are made is to burn a small amount
of material, mostly to allow separation? But if they get week or at
close to max inrush current, they will burn "ALLOT" and chatter. When
they get burnt low, that is when they start to weld. If the contacts are
larger then needed, there is more area to absorb the inrush current. i
wouldn't say everyone needs a 200 amp unit, but a little 40-60 amp will
do allot of coiling. If the control circuit is built as a module, It can
be used for many coils.
Fast and strong and you wont go wrong
Marc M.

Tesla list wrote:
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<CHURCHMON-at-aol-dot-com>
> 
> Hi Rick,
> A cap can be placed accross the circuit to keep the points from arcing or
> (Welding)
> themselves shut :.(  if the current is high enough!
> This is the reason that there is a cap accross the points of an automobile
> ditributor
> system , too keep the arcing to a minimum.
> I too placed a post reguading this issue for my 120 volt system, unfortunatly
> I never got an answer as to what value the cap shuold be for this type of
> arrangement. I'm pulling roughly 30 amps (4 15/60's) or 1.5 kva.