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Need a datasheet for GE capacitor.

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LAN_403

Arcstarter

Mon Oct 20 2008, 03:26PM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Today i 'scavenged' some large GE capacitors. I already know they are above 20uf(my meter will not go any higher) and they are the same voltage as my pig, 7650 volts and 150kvar. I got two of these but one is shorted. They contain 1.9 gallons of some kinda dielektrol liquid or something like that and have internal bleeder resistors. If i can find the datasheet i will likely sell if or use it for a small (actually kinda big) pulse discharge cap. I have two numbers that will help:
s093220 or so93220 not sure
58l702wc51095

Thanks for any help.

Bamacoiler

Mon Oct 20 2008, 05:25PM

Registered Member #1628 Joined: Wed Aug 06 2008, 08:48PM
Location: Huntsville, AL USA
Posts: 95

From Pupman.com

This might help.

I came up with 6.802 microfarad but I could be wrong.

Arcstarter

Mon Oct 20 2008, 05:52PM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Thanks! But it seems to be more than 20uf because it is more than my meter can read. It is not shorted because i checked for continuity and there was something like 100kohm or something(has a bleeder resistor).

Bamacoiler

Mon Oct 20 2008, 06:41PM

Registered Member #1628 Joined: Wed Aug 06 2008, 08:48PM
Location: Huntsville, AL USA
Posts: 95

Well I doublechecked my math and I'm pretty sure I'm right Matt. Test it. Put it in series with one output leg of your pig and try to draw an arc. If it works you might possibly get longer arcs with the capacitor. If it doesn't work then I'm afraid it might be open circuit.

But you never can tell til you try it.
Arcstarter wrote:

Thanks! But it seems to be more than 20uf because it is more than my meter can read. It is not shorted because i checked for continuity and there was something like 100kohm or something(has a bleeder resistor).

Sorry for the edit but what you wrote didn't sink in until after I posted. It looks like you didn't get an overload when you ohmed it out because your measuring the bleeder resistor. Sounds to me like the cap is more than likely open. That could be why your meter cannot read it

But you won't know for sure until you test it somehow.

Also I'm not sure how good those caps would be for pulse duty. I'm pretty sure they are for power factor correction. But I'm not 100% on that. Anybody else?

Arcstarter

Mon Oct 20 2008, 10:43PM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

Bamacoiler wrote ...

Well I doublechecked my math and I'm pretty sure I'm right Matt. Test it. Put it in series with one output leg of your pig and try to draw an arc. If it works you might possibly get longer arcs with the capacitor. If it doesn't work then I'm afraid it might be open circuit.

But you never can tell til you try it.
Arcstarter wrote:

Thanks! But it seems to be more than 20uf because it is more than my meter can read. It is not shorted because i checked for continuity and there was something like 100kohm or something(has a bleeder resistor).

Well i drew a few arcs with it in series with the pigs output and the arcs where exactly as they where before i put the cap on. It would probably make a good filter cap :P.

Steve Conner

Tue Oct 21 2008, 09:26AM

Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706

They will be PFC caps. Electric utilities don't hang pulse capacitors from poles in the street, just on the off chance that some kid might want to crush cans after a hurricane.

Arcstarter

Tue Jun 16 2009, 07:24PM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

I am restarting this thread because i have decided to drain the oil from one of them.

So far i have 1 and a half coffee cans full of the stuff. Smells exactly the same as microwave capacitors. I also plan to cut the standoff out, i will take the bleeder resistor perhaps, and i might even take a pit of the oily not-worth-it dielectric. Not sure why, but i am just sometimes bored :P.

If anyone is interested in the insulator, i might sell it. I have no plans. I know that it is good for plenty of current, the capacitor was 200kva.

Oh, and BTW, i found the capacitors where 11.5uf. If i charged to more than 4kv, it would arcover. Using two MOT's in series, it would arcover if left charging for a bit too long. I used two 16kohm resistors in series to limit charging current (still charged fairly fast) and i charged to 2kv which is 25 joules and it would explode dead mosfets. My 624 joule SCR triggered bank cannot do that. At 100 joules, i could crush a can pretty good, with too many turns of too thin wire.

HV Enthusiast

Wed Jun 17 2009, 02:52PM

Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068

Keep in mind most of those GE capacitors have PCB based oil. Not something you want to touch or throw away down the drain.

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