RE: Contactor Question - Order In Circuit

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

I like the thought of being able to plug my controller
in with no load. I have two 1256's so I'd rather any
sparks take place in my 90 amp contactor, and not in
my power plug. I do have a 100 amp fused disconnect
that I could use before plugging and unplugging the
controller, but I prefer to use my contactor. This is
how my smaller coil controller was connected.

Adam

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "Cameron B. Prince"
> <cplists@xxxxxxxxxx>
>
> Hey guys,
>
> Do you suggest the contactor to be before the variac
> on the line side or
> after it on the output side? One of the primary
> reasons David is using one
> is to get the surge required to break the multiple
> spark gaps. From what I
> understand, some of the time when he's just running
> up the variac, it's not
> firing them. So if he started at 0V to protect the
> contacts, it would defeat
> the purpose of the contactor anyway.
>
> I am in the process of adding a contactor to my
> controller and was planning
> to put it on the output side. This way I could use
> the voltmeter to set the
> variac where it should be, get the ARSG up to speed
> then fire the contactor
> sending the power out to the pig. I plan to have a
> key switch and a dead
> man's switch in series with the contactor coil.
>
> Are there advantages and disadvantages either way?
> What do you suggest?
>
> Thanks,
> Cameron
>
>  > -----Original Message-----
>  > From: Tesla list [mailto:tesla@xxxxxxxxxx]
>  > Sent: Saturday, August 20, 2005 12:47 AM
>  > To: tesla@xxxxxxxxxx
>  > Subject: Re: Contactor question, Arc Suppression
>  >
>  > Original poster: "Gerry  Reynolds"
> <gerryreynolds@xxxxxxxxxxxxx>
>  >
>  > Hi Bart,
>  >
>  > I always try to energize my variac with it set to
> zero volts.
>  >  Getting the variac powered up is usuallly my
> problem.  Once
>  > that happens, I almost never have problems
> powering up the
>  > coil (even with GFI circuit breakers and no EMI
> filter).
>  >
>  > Gerry R.
>  >
>  >
>  > >Original poster: "Barton B. Anderson"
> <bartb@xxxxxxxxxxxxxxxx>
>  > >
>  > >Hi Gerry,
>  > >
>  > >I would also bet your coil takes little V adjust
> to get the coil
>  > >sparking. I've had this same issue. My coil
> would benefit
>  > from a double
>  > >stack (or even a super-sized variac like Ed
> Sonderman has -
>  > something
>  > >like 50A?).
>  > >
>  > >Take care,
>  > >Bart
>  > >
>  > >Tesla list wrote:
>  > >
>  > >>Original poster: "Gerry  Reynolds"
> <gerryreynolds@xxxxxxxxxxxxx>
>  > >>
>  > >>Good point Bart.
>  > >>
>  > >>It doesnt matter what it use to start the
> "timer" as long
> msnip...
>
>
>


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