Re: 15,000 volts+15,000 volts = 15,000 volts?

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Mddeming-at-aol-dot-com>

In a message dated 9/8/02 12:07:04 AM Eastern Daylight Time, tesla-at-pupman-dot-com
writes:



>
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Beans45601-at-aol-dot-com>
>
> how come when you put two 15kv/30ma transformers together in a parallel, you
> get 15kv/60ma back? Why don't you get 30,000/60ma back out?
> Thanks
> Adam
>



Hi Adam,
       (Pover=voltage x current) There is no "free lunch". With one 15 kV x 30
ma you are putting in 450 Watts. With two in parallel you are putting in twice
as much power, so the current would double: 15 kV x 60 ma = 900 Watts. Two in
series (assuming they could be properly insulated and isolated) would double
the voltage: 30 kV x 30 ma = 900 Watts again. But 30 kV x 60 ma = 1800 Watts
and you can't get out twice the power you put in. Transformers can change the
voltage and current ratios, but the product out cannot be greater than the
product in. Transformers don't create new power. 
Hope this helps,
Matt D.