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Re: [Bulk] Re: [TCML] Looking for Pole Pig Capacitors
Hi Adam,
I don't recall the EXACT amount of voltage/current
but it was somewhere in the 220 to 240 volts range
in and flowing in the 80 to 90 amp range, IIRC. I
had been subjecting the cap with this kind of abuse
from the get-go, but I guess it finally took all that it
could stand and finally gave up the ghost in a most
unspectacular way. :^(
I had mentioned that it did not get warm during
operation. Actually this is kind of "half true". The ex-
ternal ferrous metal casing did get notably warmer than
ambient temp after a minute or two of operation but
it cooled down pretty quickly after shut down. This
indicated to me that the heating was not originating
inside the "guts" but instead was due to inductive
heating of the ferrous metal casing from the magnetic
fields, as it was merely inches below my primary coil
assembly. Never-the-less, it only lasted me for about
2 - 3 hours of operational time. Like I said, the 31885
Maxwell has not given me any problems, nor is there
any notable external heating (and a plastic case isn't
likely to experience inductive heating, either) ;^)
David
----- Original Message -----
From: "Yurtle Turtle" <yurtle_t@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Sunday, November 27, 2011 9:13 AM
Subject: [Bulk] Re: [TCML] Looking for Pole Pig Capacitors
What voltage and current were you using when you killed your Hipo'?
I've been hitting my 14.4 kV 25 kVA pig with 280 volts at 100 amps, which
works out to 16.8 kV at 1.67 amps.
________________________________
From: drieben <drieben@xxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Saturday, November 26, 2011 4:33 PM
Subject: Re: [TCML] Looking for Pole Pig Capacitors
Hi Travis,
<snip>
I have also personally experienced
a failure of a 0.1 uFd, 50 kV rated Hipotronics pulse cap
in my Green Monster Tesla coil system and I probably
only got 2-3 hours of total run time out of it before failure.
My GM coil also utilizes a 10 kVA, 240V/14.4 kV pig.
An autopsy revealed that the failure mode of the Hipotronics
cap was strickly dielectric breakdown, due to overvoltage -
NOT over current. The cap unit had no external signs of
internal failure - no case rupture or external bulging/swelling,
and the Hipotronics unit didn't get warm during operation.
</snip>
Happy Sparkin',
David
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