Re: T&R pole pigs..

• To: tesla-at-pupman-dot-com
• Subject: Re: T&R pole pigs..
• From: Steve Rodway <Legion-at-bigfoot-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Thu, 12 Nov 1998 16:29:16 -0700
• Approved: terryf-at-verinet-dot-com

Tesla List wrote:

> BTW: someone on the list tell me if I am wrong, but think
> I have figured out how to inexpensivly measure my current
> draw. I thought about current transformers, etc.. then
> as I was figuring out the wiring for the ballast + the series
> resitor (0.4ohm -at- 1KW, used, $15.00) I realized that I could
> get both average and peak current draw via voltmeters.
>
> Average: Connect 0-15VAC meter aross resistor. Voltage follows
> at 0.4*current draw.. so at my planned max of 30A, I see 12V.

    Be careful with this, the resistance of your ballast may not be a
constant,
if it is composed of heating elements, then there will be a positive
temperature
co-efficient, and it may also not be a pure resistance

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