Re: [TCML] Isolating Transformer

[<pterren@xxxxxxxxxxxx>]

Brian, what do you do with the output earthing? Do you use MOV's or other 
filters.
I have a 1kW isolating transformer. The only time I have used it live was 
for a briefcase coil (1/2 low power NST for 3 inch sparks).
Interfered with the PA some distance away big time.  I used a counterpoise 
plus mains earth.

Peter
Tesladownunder.com


-----Original Message----- 
From: BrianB
Sent: Friday, April 12, 2013 9:48 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Isolating Transformer

Michael,

When we do professional gigs we try and always use an isolation transformer 
and when we can we configure it as a 2:1 step down transformer (ie 480vac to 
240vac).

2a isn't much power. That's only 480w. I wouldn't be too concerned at this 
power level but better safe than sorry.

BrianB

On Apr 12, 2013, at 5:11 AM, Michael Gray <graymp89@xxxxxxxxx> wrote:

> I just remembered that I have an old 1:1 isolating transformer, which may
> be of use for my TC. It's a chunky and heavy unit so it's gotta be a
> traditional transformer. Have these units been used before in TCs? I have
> already purchased a mains line filter, so I would probably have the line
> filter across the mains socket, followed by this isolating transformer to
> add further protection. The specs of it are:
>
> 750VA
> 50Hz
> 240V primary, 240V secondary
> 3A secondary
> Single phase
> VEC. GRP. 71 (not sure what this is)
>
> (My NST is likely to draw around 2A - although haven't finished it yet so
> can't be sure)
>
> What do we think about this?
>
> http://imageshack.us/photo/my-images/854/img20130412125019.jpg/
> http://imageshack.us/photo/my-images/856/img20130412124642.jpg/
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