Re: [TCML] Emi filter connection

[Gary Lau <glau1024@xxxxxxxxx>]

Hi Jeff,

I put up a web page on my site about how to and how not to connect an EMI
filter:   http://www.laushaus.com/tesla/emifilter.htm

>From your description, it sounds like you have your filter hooked up as in
Figure 2 on my web page, except that you connect the mains ground to the
EMI filter case.  This is bad, because C2 and C3 in the filter provide a
low impedance path for common mode RF on the NST primary to get to the
mains ground connected to the case.  What you want is Figure 3, so that you
have an L-C low pass filter between the NST and everything that goes back
to the wall.

Regards, Gary Lau
MA, USA

On Tue, Mar 27, 2012 at 9:54 PM, Jeff Miller <jeffmill2@xxxxxxxxxxx> wrote:

>
> Hello
> I am second guessing my emi filter connection.
> my filter is located at the coil not at the variac. From my variac to my
> coil I run 3 wires line, neu and gnd to the filter . the ground is
> connected to the case of my filter and NOT to rf gnd which starts from the
> case of the nts on out. it is a 15 amp round style filter I bought off of
> eBay.  Is this ok? I am not running the filter in reverse.
> Sent from my iPad_______________________________________________
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