Discharging caps that way can ruin the cap. Just turn off the supply or
apply a resistor load. The internal plates violently move - ripping themselves up.

You get away with it - smile - sell it - it blows up when used. Not a happy day.

Martin

Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


Ignoramus27088 wrote:
On Thu, 30 Mar 2006 11:44:24 -0800, Joel Kolstad wrote:

"Ignoramus27088" wrote in message
m...

The seller was wrong in describing them as 22 VOLT capacitors. They
are 22 KILO volt capacitors. (the seller is Fermilab).

This is kinda a sad commentary on the kind of people they'll hire at
Fermilab these days, no?


Indeed.


I don't know the proper care and feeding of such high energy storage
capacitors, but when I've seen people working with them they always carried a
long (about 6') wooden stick with a shorting strap (about 1"x6") on top to
always ensure the caps were discharged before they touched them.


OK, I think that we are up to something here.

The test setup that I may try is as follows:

- 9kV franceformer feeding the cap, with remote disconnect leading to
the HV pole
- Wires from the cap connected to two junk steel flats, all set safely
apart
- A shorting stick (also made of junk steel) with a wooden broomhandle

The procedure would be

- connect everything
- put on hearing protection
- turn on the franceformer
- disconnect franceformer with remote disconnect.
- turn face away, short the steel flats using broomhandle
- hear BOOM
- describe testing in the ebay ad

i


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