Re: Capacitor Safety Discharge Method (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 07 Aug 2007 15:48:15 -0400
From: Crispy <crispy@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Capacitor Safety Discharge Method (fwd)

What I was thinking was to have both bleeder resistors across the
capacitor and a solenoid discharge method (without any series bleeders)
as well.  It would be meant purely as a safety device.  If this were
activated before charge was drained, it could (as has been discussed)
harm components of the circuit, but it would only be meant to discharge
the capacitors in the event that one of the bleeder resistors fell open.

Chris

On Tue, 2007-08-07 at 06:51 -0600, Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Mon, 6 Aug 2007 21:45:35 -0700
> From: Ray von Postel <vonpostel@xxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Capacitor Safety Discharge Method (fwd)
> 
> Guys:
> 
> You are shorting out capacitors to keep from frying yourselves. What is 
> the safety logic of putting some resistors in the circuit?
> 
> Ray
> 
> On Aug 6, 2007, at 7:54 PM, Tesla list wrote:
> 
> >
> > ---------- Forwarded message ----------
> > Date: Mon, 06 Aug 2007 20:38:11 +0000
> > From: nancylavoie@xxxxxxxxxxx
> > To: Tesla list <tesla@xxxxxxxxxx>
> > Subject: Re: Capacitor Safety Discharge Method (fwd)
> >
> > Hi, Chris. Thats exactly what I was trying to get an answer to in the
> > previous posts and I think that if you kind of read between the lines 
> > in
> > Bart's reply, you can see that its probably okay to do if you use 
> > bleeder
> > resistors and discharge the cap after the charge has bled off. What I
> > wanted to use was a Ross Engineering relay rated at 40 kv (normally 
> > open
> > contacts) and wire it across the terminals of the capacitor and
> > resistors.It would then just be a simple matter of flipping a switch 
> > and
> > doing the work of the screwdriver in a much safer fashion.Anyone see a
> > problem? Wyatt
> >
> > -------------- Original message --------------
> > From: "Tesla list" <tesla@xxxxxxxxxx>
> >
> >>
> >> ---------- Forwarded message ----------
> >> Date: Mon, 06 Aug 2007 01:53:57 -0400
> >> From: Crispy
> >> To: tesla@xxxxxxxxxx
> >> Subject: Capacitor Safety Discharge Method
> >>
> >> Hello,
> >>
> >> In light of the recent discussion about the necessity of a manual
> >> discharge for the tank capacitor in addition to bleeder resistors, 
> >> I've
> >> been considering an easier method of manual discharge than the
> >> stick-a-screwdriver-in-the-spark-gap method for my coil. I was 
> >> thinking
> >> about an electronic method, and here's the idea. Would it be possible
> >> to have a linear pull-style solenoid with an electrode that, when
> >> powered, would retract its electrode from another static electrode, to
> >> act as the safety discharge? The normal state (no electricity applied)
> >> would be to have the contacts together, and the capacitor shorted. Of
> >> course, the electrodes would have to be insulated from the solenoid.
> >> Also, would it be possible to immerse this under oil, if the gap
> >> provided by the solenoid was insufficient to prevent sparking over in
> >> normal operation, or would the oil coat the electrodes and somehow
> >> prevent safety discharge?
> >>
> >> Thanks,
> >> Chris
> >>
> >>
> >>
> >
> >
> 
> 
>