Re: [TCML] Isolating Transformer

[BrianB <brianb@xxxxxxxxxx>]

Peter,

I tie the floating output/controller chassie to a local safety ground such as the stage to insure there is no potential between the power controller and nearby equipment. I could tell a funny story about a show control headset going up in smoke as the power controller was activated 
but it was only funny because I wasn't wearing it...

BrianB



On Apr 12, 2013, at 8:40 AM, <pterren@xxxxxxxxxxxx> wrote:

> 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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