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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.
>>>
>>
>> _______________________________________________
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>> Tesla@xxxxxxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
>
>
> Dr. Resonance
>
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>
Dr. Resonance
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