RE: [TCML] GFI test

["S&JY" <youngs@xxxxxxxxx>]

Put a HV rectifier in series with your NST (e.g. a string of 20 1N4007
diodes).  Charge your MMC with HV DC.  Disconnect it (be careful - lethal
voltage!).  With a safe means (long insulated pole, HV relay, etc),
discharge the MMC into your primary.

 

A better way is to use a triggered spark gap - see archives for more
details.

--Steve Y.

  _____  

From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Timothy Patti
Sent: Wednesday, March 30, 2011 7:18 AM
To: tesla@xxxxxxxxxx
Subject: [TCML] GFI test

 

Hi all,

I recently installed a ground fault interrupter on my coil in an attempt to
get it to fire a single pulse for only 1/2 of the 60 HZ input cycle.  I
positioned it before the varic controlling the supply voltage to the NST.
 Much to my surprise the GFI did NOT trip when the coil was energised.  The
coil ran fine as if the GFI was not there.

This type of GFI needs a constant supply of power to remain in the non
tripped state so I was unable easily wire it in after the variac which is
switched on the secondary side.

 Coil details-  7000 volt, 30 mA NST switched with a static sucker spark
gap, 5 nF tank cap (MMC), magnifier configuration.

Shunts were not removed from the NST.

Does any one have any ideas for easily pulsing the coil for 1/2 AC supply
cycle short of rigging a SCR to switch at zero cross over ?



Tim
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla 

  _____  

No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1204 / Virus Database: 1498/3538 - Release Date: 03/29/11

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla