From: "Terrell W. Fritz"
Date: Thu, 23 May 2002 23:14:15 -0600
Subject: Re: [TSSP] Topload breakout potentials
Hi Bart,
At 08:20 PM 5/23/2002 +0000, you wrote:
>>
>> So how're we going to measure topvolts now?
>
>I don't know how, but we've got to figure out a way. Seems this is where
>we always get stuck.
I have been thinking on this.. but I still a thinkin.... It just is not easy
at all...
>
>Ibase measurements should be no problem and easy enough. I've decided to
>purchase a hf current sensor (Digikey has one well within our frequency
>range). It's the top volts which stumps me. How do power company's
>measure those big kv lines?
I seem to collect Pearson current monitors like candy these days. I just got a
Pearson 2100 off ebay for $50 ..
http://hot-streamer.com/temp/PearsonCTs.gif
125Hz to 20MHz... this one is nice cause it has a big 2 inch hole for lots if
insulation.
http://www.pearsonelectronics.com/Pages/Figure_D_Models_2100.html
you can borrow it like for free if you want ;-)) Just shoot me the snail mail
address...
http://hot-streamer.com/temp/P5230022.jpg
The "big boys" in the power industry have two advantages. The source impedance
is like zero ohms on a power line and the 60Hz frequency is real low and
stable. They just use fancy capacitance dividers. I used to work on them darn
things all the time...
Cheers,
Terry
>
>Bart
>
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.