[TCML] Terry Filter Caps
wavetuner at gmail.com
Tue Aug 26 20:17:57 MDT 2008
I have been pushing motor control this a bit before it gets coil nasties. I
like the 70 amp reactors and the at least 60 to 70 amp EMI filters. Over
build that baby. I found these from time to time on Ebay very affordable
They are mongo. Just use 2 phases if you are not running 3P.
They are designed, after all, to protect your VFF drive and stuff down the
From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On Behalf
Of Yurtle Turtle
Sent: Tuesday, August 26, 2008 5:48 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Terry Filter Caps
I just don't have my pig Terry filter YET. I'm using a rsg with a safety in
parallel to an 18 kV lightning arrestor, and a LV TVSS.
BTW, I just blew up my second VFD :-(((. Good thing I recently bought a
spare from you :-)) I'm getting some nasties, which is why I want (need) to
add more filtration. I actually blew a hole in one of my 3 phase 30 EMI
filters, that I had ganged all three phases together on. Though it was
running pretty crazy with my recent addition of a .1 nF cap! It was funny,
one day it ran beautifully, then a couple of weeks later, it was running way
worse, then the VFD croaked.
--- On Tue, 8/26/08, bartb <bartb at classictesla.com> wrote:
> From: bartb <bartb at classictesla.com>
> Subject: Re: [TCML] Terry Filter Caps
> To: "Tesla Coil Mailing List" <tesla at pupman.com>
> Date: Tuesday, August 26, 2008, 7:24 PM
> Hi Phil,
> Yes, I thought Adam has sent the post (had two lines of
> "so and so
> wrote:" and for some reason thought it was Adam).
> Anyway, wow, a Terry filter fitted for a pig!
> I especially like the horn gap approach and even the
> sphere's on the
> ears! It certainly doesn't hurt to provide a little
> transformer filtering.
> Take care,
> FIFTYGUY at aol.com wrote:
> > Yeah, and the MOV's are slow to respond to
> transients at 1 MHz. But they
> > certainly are nice to have!
> > Some distribution arrestors use "combined
> technology" with a spark gap
> > in series with the MOV element, just to complicate
> things. I think the big one
> > I've got sitting around is like that, since the
> last time I tried it across
> > my pig on an untuned coil, hot metal sparks actually
> shot out of it and
> > rolled on the ground.... The two arrestors on my pig
> have done just fine at
> > 15+kVA, even when the safety gap has been firing. I
> feel I've got that safety gap
> > set pretty tight, but my arrestors are as tight on the
> MCOV specs as I dare go
> > (even tighter than the specs for the "usual
> NST" Terry Filter).
> > -Phil LaBudde
> > Center for the Advanced Study of Ballistic
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