RE: [TCML] Polypropylene?

["John Paul Grippa" <pupman@xxxxxxxxxxxx>]

I was under the impression that self-healing works as such.  When the
capacitor fails, the metal film at the point of failure would burn back to a
greater degree than the dielectric.  The prevents the layers of foil from
shorting and destroying the capacitor.  The capacitor would still work with
an ever so slightly less capacitance.


-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Jim Lux
Sent: Tuesday, December 04, 2012 1:19 PM
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Polypropylene?

On 12/4/12 4:35 AM, Atomic wrote:
> What about this whole self-healing thing? Any links on how does that
works?
>


ACtually, it's not the dielectric that heals.  The capacitor is made from
lots of little capacitors in parallel with what is essentially a "fuse" in
series with each cap.  When the dielectric fails, the current causes the
fuse to blow, removing the cap from the circuit.

Maybe 10 years ago on the list there was a discussion of this.  There are
some cool microphotos around of failed capacitors, etc.

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