RE: The Geek Group High Voltage Capacitors, making a HV switch, (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 9 Nov 2006 17:37:34 -0800
From: Jim Mora <jmora@xxxxxxxxxxx>
To: 'High Voltage list' <hvlist@xxxxxxxxxx>
Subject: RE: The Geek Group High Voltage Capacitors, making a HV   switch,
      (fwd)

Hello All,

Taken under advisement so far: use virgin UHDP 1.5" solid rod, 4' long to
throw the charge, open and discharge connections. Opposite charges shall not
be closer than 4" or more as possible. 1.5" to 2" copper pipe to join the
center lugs of the capacitors and to provide a return connection. Sleeping
on method of grounding capacitors together, perhaps 2 2" copper pipes
flattened a mated with as many as possible attachment screws or 2 2" buss
bars. SPDT to be mounted on 5" ceramic standoffs attached to 5/8 G10 10X12
base material. Discharge to be done by a series of 10" long ceramic 1.125"
diameter Ceramic HV resistors capable of a complete discharge from 40KV.
Activation via a 4" pneumatic plunger connection to 2" brass dowels.
Remotely controlled from a 10' * xKJ Tygon tubing.

Many Thanks,

Jim Mora   

-----Original Message-----
From: High Voltage list [mailto:hvlist@xxxxxxxxxx] 
Sent: Thursday, November 09, 2006 1:56 PM
To: hvlist
Subject: RE: The Geek Group High Voltage Capacitors, making a HV switch,
(fwd)

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 08 Nov 2006 05:53:24 -0800
From: Jim Lux <jimlux@xxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>, hvlist <hvlist@xxxxxxxxxx>
Subject: RE: The Geek Group High Voltage Capacitors, making a HV   switch,
      (fwd)

At 04:46 AM 11/8/2006, High Voltage list wrote:
>Original poster: Steven Roys <sroys@xxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Wed, 8 Nov 2006 00:44:45 -0800
>From: Jim Mora <jmora@xxxxxxxxxxx>
>To: 'High Voltage list' <hvlist@xxxxxxxxxx>
>Subject: RE: The Geek Group High Voltage Capacitors, making a HV  switch,
>       (fwd)
>
>Hi Jim, Bert and et al,
>
>So what is a safe distance BTW components or more directly Buses with
>rounded edges or Hard copper pipe to go out and make a return path for a
>wire blow?. I seem to remember 40KV/in. I have the break down chart
>somewhere but that deals in needle points and spheres.

40 kV/inch is pretty bold.  Breakdown in a uniform field is 70 
kV/inch, and anything with curved components is hardly uniform.  Your 
40 kV/inch has a safety factor of less than 2.

One rule of thumb might be an inch per 10 kV.  Watch the radius of 
curvature for corona losses.  At 20 kV, the *radius* needs to be on 
the order of 1/4"..  1/2" diameter

Air insulated HV stuff tends to be quite bulky.