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4hv.org :: Forums :: High Voltage
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Monitoring voltage of 15kv pulse cap?

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hotcrazyfruit
Wed Mar 25 2009, 02:31AM
hotcrazyfruit banned on 5/26/2009
Registered Member #1877 Joined: Mon Dec 22 2008, 02:03AM
Location:
Posts: 147
DYI wrote ...

Yes, not blowing up the capacitor is the problem here.
In a typical can-crushing scenario, without anything to limit the current and with good thick connectors and strong contacts, you'd be looking at currents in the >100kA range. Across a hard short, this capacitor would discharge just over 700kA.

Since you're (presumably) already stuck with it, you may want to play around with Barry's RLC calculator until you can come up with a combination of a (very low value, homemade) resistor and possibly an inductor that will bring the output values down to the rated levels.

Just to clarify, you spent $900 on something without even figuring out how to use it? I want your job tongue
lol... i assumed pulse capacitors meant pulse rated capacitors, i didn't even realize there was a data sheet on the site. o well, 30000 amps is good enough. i could charge it once and get like 50 crushed cans off it LOL
and BTW i split the cost with my acquaintance. so it only cost me 450 xD now shipping of the 312 pound cap was the real cost.... (since it was shipped to my house).
im sure there is a way so i could just get momentary pules of 30kA (not that i can think of at the moment) that way i could charge it and discharge safly, without blowing it up, and get multiple discharges off it xD. but thanks for the posts, or i would have had oil all over me and my garage.
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hvguy
Sat Apr 11 2009, 05:53PM
hvguy Registered Member #289 Joined: Mon Mar 06 2006, 10:45AM
Location: Conroe, TX
Posts: 154
It's a late reply, I know, but to answer your question: The "low energy" statement is because the probe is meant to be hand held for applications like flyback metering in TV's. In your "high energy" application they would clearly not want you holding it suprised . I used mine to monitor a 100KJ bank and intend to use it with a 900KJ bank...
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