RE: Variacs and current draw

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Jim,

See graph F at:

http://hot-streamer-dot-com/TeslaCoils/Misc/VarBack.jpg

Always hard to say for sure, but this graph suggest short term high current
overloads are ok.  A lot depends on how well the variac is made.  A cooling
fan can really help too!

Cheers,

	Terry


At 07:40 PM 10/11/2002 -0400, you wrote:
>Really??
>
>I run three 9/30's with one with no apparent trouble. In fact when I had
>it wired wrong (I think it was acting as a voltage amplifier) I was
>literally smoldering the variac and it still works fine.
>
>When my air blast gap is set to wide, like WAYYY to wide (for big arcs)
>I crank the variac up all the way and THEN throw the power on which must
>really stress it and still have no trouble to date.
>
>Am I just lucky or is my math wrong? I calculate it thusly-
>12x60=720 watts
>9x30x3=810 watts
>
>Mind you I'm not being a wise guy, I'm just curious if I am way off or
>what??
>
>Jim L
>http://www.jlproduction-dot-com/forum
>(online Tesla coilers forum)
>
>
>
>-----Original Message-----
>From: Tesla list [mailto:tesla-at-pupman-dot-com] 
>Sent: Friday, October 11, 2002 5:58 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: Variacs and current draw
>
>Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
>
>Hi Matt,
>
>About 14 amps!!  Variacs can be pushed pretty hard but a 5 amp variac is
>probably really too small.  But...  If you add 200uF of PFC caps then
>you would
>be at 8 amps which would probably be in range of a 5 amp varaic.
>
>Cheers,
>
>        Terry
>
>
>At 05:19 PM 10/11/2002 -0400, you wrote: 
>
>>
>> How much current would the average 12/60 transformer draw. The reason
>I m
>> asking is that I want to use a variac with it but I don t know which
>one I
>> can get. Is 5amps enough?
>>
>>  
>>
>> Matt
>
>
>
>
>
>
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