Re: [TCML] VDG

["ExtremeElectronics.co.uk" <tesla@xxxxxxxxxxxxxxxxxxxxxxxx>]

Doug,

    A pleasure,

    Earthing even a small VDG is a problem. I killed some electronics 
from mine purely because they shared a common earth. The impulse can be 
very large.
    I run mine from 12V as this removes some of the issues, but I still 
kill my motor controller from time to time with a good discharge.
    But maybe I shouldn't have tried to do the motor control with a 
microprocessor :)
    Derek


On 18-Feb-18 14:14, doug wrote:
> Hi Derek, Thanks for your advice!  I will be putting a grounded power 
> cord on the VDG today, and I think it also may be wise to run it 
> through a line filter I built from a Diagram Bert sent me!
> Doug J.
>
> -----Original Message----- From: Derek, Extreme Electronics
> Sent: Saturday, February 17, 2018 4:08 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] VDG
>
> Doug,
>
>     You must move some sort of ground, When a VDG strikes you can get
> very large currents flowing especially in the loop of the discharge.
> Ideally I would have a separate earth and not depend on the mains
> wiring, else you can get spikes into other connected electrical powered
> devices.
>
> It is also important that the discharge cannot not make a connection to
> the supply, otherwise you may have a long spark backed by mains current.
> An earthed box covering the mains powered items is vital to prevent this.
>
> Derek
>
> On 16/02/2018 19:32, doug wrote:
> > For those also interested in VanDeGraaffs a question
> > This is a video of a VDG I just finished building, You will notice 
> > some strikes to the dimmer switch, would it be wise to use a 2 wire + 
> > ground for the AC hookup I have instead of the 2 wire only?
> > Doug
> >
> > https://youtu.be/DlCD2jYjg2A
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