[Amps] New Variaic Question

[Will Matney]

Not a variac Rich, that transformer quiz you had a while back about
surge current. Didn't it calculate to something over 100 amperes?

Will



> On Sun, 30 Jan 2005 14:26:41 -0800, R. Measures <r at somis.org> wrote:
>
>> I have never measured the inrush-I to a Variac at startup.
>>
>> On Jan 30, 2005, at 1:07 PM, Will Matney wrote:
>>
>>> Rich,
>>>
>>> Yes, it sure will and is what it's designed to do. Another member on  
>>> here and myself done some investagating on surge currents and it was  
>>> surprising about how many cycles it takes for a transformer to  
>>> completely level out (about 20-25 if I remember on the one test). The  
>>> first few cycles (about six) was really when it drew the most and were  
>>> talking a HUGE amount. Richard Measures was looking at one a while  
>>> back, and it came up to over 100 amperes at startup.
>>>
>>> Will
>>>
>>>
>>>
>>> On Sun, 30 Jan 2005 14:59:18 -0600, Rich <rdjmgmt at socket.net> wrote:
>>>
>>>> I am building my first amp , now starting on the power supply. It will
>>>> have a 240v 10 amp Powerstat. I have a 4 pole "latching" relay that I
>>>> think I will wire so it has a safety drop out , then a DPDT relay with
>>>> my soft start resistors. The last variac that I set up to control
>>>> voltage for a tesla coil always caused a problem when I plugged it in.
>>>> It would blow to 20 amp circuit breaker even though the system pulled
>>>> less than an amp at idle.  I would have to try several times to get it
>>>> to stay on line. The only thing wired in was the variac and a 24v
>>>> control transformer.
>>>> I am hoping to avoid any problems with the HV system as I build it,  
>>>> will
>>>> the soft start system take care of the instantaneous inductive load  
>>>> that
>>>> it appears I was getting with my other variac ?
>>>> Rich /  kd0zz
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>>>
>>>
>>>
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>>>
>>
>> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
>>
>>
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