Re: Capacitor Safety Discharge Method (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 07 Aug 2007 01:04:31 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Capacitor Safety Discharge Method (fwd)

That's fine Chris. The resistor dump the load under normal conditions, 
and in the event of a bleeder failure, the solenoid handles the 
mechanical action. No problem with that.

Take care,
Bart

Tesla list wrote:

>---------- 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
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>      
>>>
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