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Re: Equalizing resistors for electrolytic capacitors
- To: tesla@xxxxxxxxxx
- Subject: Re: Equalizing resistors for electrolytic capacitors
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Tue, 30 Nov 2004 18:48:43 -0700
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- Resent-date: Tue, 30 Nov 2004 18:49:10 -0700 (MST)
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Original poster: Ed Phillips <evp@xxxxxxxxxxx>
"A common guideline is around 500 ohms-1K/volt for the resistor. A 450V
cap
would get a 220K - 470K resistor. Watch the power dissipation...
several
watts wouldn't be unusual. At this kind of value, you're going to have
several mA through the string, which is far more than the usual leakage
current."
That's one or two mils. As for the leakage, of course it all depends
on the capacitance. I've found that 4000 ufd 400V capacitors from the
swap meet run as much as 5 ma leakage until well formed. 22 ufd 450
volt would indeed have a LOT less leakage.
Ed