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Re: [TCML] pole pig question ###
Hi Hans,
That's why I actually place the pole pig inside my control panel.
I can't accidently bump into any bushng when the pig is com-
pletely enclosed inside my control panel assembly. Of course
this added weight does make for an extremely heavy control
panel assembly - ~ 500 kilograms.
David Rieben
----- Original Message -----
From: "Hans Schattenmeister" <klugmann@xxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Monday, January 28, 2008 5:19 AM
Subject: RE: [TCML] pole pig question ###
The only thing that frightens me about this configuration is the danger of
electrocution. With two hot HV bushings you can accidently bump one and
survive. With one bushing grounded the other remains hot at a full 14.4 kV.
Bump this one and you'll die. Just a thought. Your rubber tennis shoes won't
insulate you from 14.4. They might protect you from 7.2 kV.
Herr Schattenmeister> From: drieben@xxxxxxxxxxx> To: tesla@xxxxxxxxxx>
Subject: Re: [TCML] pole pig question ###> Date: Sun, 27 Jan 2008
07:45:31 -0600> CC: > > Yep, I have have to totally agree with the good
doctor> about grounding one ear of the pig. As a matter of fact,> since you
can ground one ear of the pig, this means that> you can indeed use a SINGLE
eared pig and use the> case as the return ground. "I" tie this case ground
of the> pig to the RF ground and leave it isolated from the mains> ground
since I also tie both the primary and secondary> coils' base to the RF
ground as well.> > I think DC and I may veer a bit in our opinions in how>
you get the HV from the pig to the base of the coil. "I"> like to use x-ray
cable and let the outer shield be the> RF ground while letting the inner
condutors carry the> HV potential. DC has had issues with the Blumlein ef->
fect from using some type of coax for the transmission line> but I have
never had any problems with this using x-ray> cable, but that's another
thread/discussion.> > He is also totally correct in playing it safe by
completely> unplugging the power before "laying on of hands" to the> naked
conductors of the primary circuit. Also, make> darn sure that the
capacitor(s) is completely discharged> (better yet - crowbar shorted!)
before doing this.> > David Rieben> > > > ----- Original Message ----- >
From: <resonance@xxxxxxxxxxxx>> To: "Tesla Coil Mailing List"
<tesla@xxxxxxxxxx>> Sent: Saturday, January 26, 2008 7:26 PM> Subject: Re:
[TCML] pole pig question ###> > > >> >> >> > a typo ---- should be NEVER
trust your life to a relay or switch.> >> > Dr. Resonance> >> >> >>> >>> >>>
>>> >> Best to ground one of the pigs bushings, ie, run it single ended
ouput.> >>> >> also, NEVER just "shut off the power while adjusting pri
tap". This is> >> suicide. NEVER trust your like to a switch or relay.
ALWAYS UNPLUG the> >> power cord from the wall before going anywhere near
the pri coil. > >> ALWAYS.> >> Then it can never bite you, and one bite from
a pole pig usually results> >> in death not just a shock.> >>> >> Dr.
Resonance> >>> >>> >>> >>> >>> This is how I would hook it up.> >>>> >>>
Connect 240 VAC to the transformer primary with the variac connected in> >>>
series in one of the lines.> >>>> >>> Put a choke coil on the each High
Voltage terminal and connect them in> >>> parallel with the spark gap. Do
not ground any of the HV terminals.> >>>> >>> Connect a wire from the other
side of the spark gap to 1 side of the> >>> capacitor.> >>>> >>> Connect a
wire from the other side of the capacitor to the inside turn> >>> of> >>>
the primary coil.> >>>> >>> Connect a wire from the other side of the spark
gap to the aligator clip> >>> wire that goes to the other end of the primary
coil.> >>>> >>> No choke coils in the HV lines at the primary coil.> >>>>
>>> Connect the bottom end of the secondary coil to a GOOD earth ground.>
>>>> >>> Connect the strike rail around the outer edge of the primary coil
if you> >>> have one to earth ground too.> >>>> >>> Toroid or sphere for the
top load.> >>>> >>> Turn on the 240 VAC crank up the Variac and adjust the
primary tap for> >>> best resonance frequency. Needless to say always turn
off the voltage> >>> before moving the aligator clip to another primary
tap.> >>>> >>> Be sure you have a cooling fan on your spark gap other wise
it will over> >>> heat and your coil will produce sparks for only about 10
seconds or> >>> until> >>> the spark gap gets too hot to function
correctly.> >>>> >>> I like to use 12 guage solid copper insulated house
wire for all my> >>> connections it makes it very easy to bend the wires and
put them exactly> >>> where I want them and they stay there. Make sure all
wires have plenty> >>> of> >>> clearance to prevent arcs to other places.>
>>>> >>>> >>> http://home.earthlink.net/~gary350/tc10-4.jpg> >>>> >>>
http://www.liveleak.com/view?i=563_1188208737> >>>> >>>> >>>> >>>> >>>>
>>> -----Original Message-----> >>>>From: Jim Calvin
<jcalvin@xxxxxxxxxxxxxxx>> >>>>Sent: Jan 16, 2008 4:25 PM> >>>>To: 'Tesla
Coil Mailing List' <tesla@xxxxxxxxxx>> >>>>Subject: [TCML] pole pig
question> >>>>> >>>>Hi guys,> >>>>> >>>> I am trying to test my 25KVA pole
pig. I am not running my> >>>>coil yet. I wanted to test the system out. So
this is how I have it> >>>> wired:> >>>>> >>>>I have a 240Vac input with a
7.8kKVA variac with a control switch. I am> >>>>using the variac to regulate
the voltage. I have a 6.5mH choke (hand> >>>> made> >>>>using 10 gauge wire)
in series with the primary. I have a .05uF (at> >>>> 50KV)> >>>>capacitor
connected to the HV output of the pole chicken as a test load.> >>>> One of
the> >>>>HV outputs is connected to GND along with the pole chicken can. My>
>>>> variac is in> >>>>a control box with a voltmeter and a current meter. I
have a fluke> >>>> meter> >>>>across the input 240Vac of the pole chicken
after the ballast. Between> >>>> the two> >>>>volt meters I was going to
check the voltage drop across the ballast see> >>>> if> >>>>the it was doing
it's thing.> >>>>> >>>>I set the varaic at a 100V using the meter in the
control box before I> >>>>switch it on to the pole chicken and ballast. When
I switch it on I> >>>> would> >>>>expect the voltage in my panel meter to
stay the same and my fluke meter> >>>> to> >>>>be slightly less because of
the drop across the ballast. I figure my> >>>> load> >>>>should draw about 8
amps out of the variac.> >>>>> >>>>Well when I turn the switch on the power
to the pole chicken and> >>>> ballast,> >>>> the> >>>>fluke meter is giving
110v and the meter in my control box jumps from> >>>> 100> >>>>to 110V
(aprox. It is an analog meter).> >>>>> >>>>Then I decided to use my
oscilloscope (I am part owner of design> >>>> consulting> >>>>company and I
have access to this equipment) and check the voltage> >>>> before> >>>>the
ballast and after. Well the voltage after the ballast went up just> >>>>
like> >>>>the fluke had shown.> >>>>> >>>>What am I doing wrong? Is it
possible that the HV output is leaking> >>>> back> >>>> to> >>>>the primary?
What is the isolation voltage between primary and> >>>> secondary?> >>>>>
>>>>I got this pole chicken from T&R electric. It was actually a gift from>
>>>> a> >>>> bunch> >>>>of friends/fellow coilers). It is supposed to be
new/reconditions and> >>>>checked by them.> >>>>> >>>> >>>
_______________________________________________> >>> Tesla mailing list> >>>
Tesla@xxxxxxxxxxxxxx> >>> http://www.pupman.com/mailman/listinfo/tesla> >>>>
>>> >>> >> Dr. Resonance> >>> >>
_______________________________________________> >> Tesla mailing list> >>
Tesla@xxxxxxxxxxxxxx> >> http://www.pupman.com/mailman/listinfo/tesla> >>>
>> >> > Dr. Resonance> >> > _______________________________________________>
> Tesla mailing list> > Tesla@xxxxxxxxxxxxxx> >
http://www.pupman.com/mailman/listinfo/tesla> > > >
_______________________________________________> Tesla mailing list>
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