SCADA (was Re: Help to identify a computer?)
cclist at sydex.com
Sun Feb 18 01:38:12 CST 2007
On 17 Feb 2007 at 22:14, woodelf wrote:
> Lets not forget EDISON promoted DC as well.
> When you think about it, the RPM of the generator
> is the limiting factor. You can't have your moving
> parts move too fast.
> Or too slow -- hamster powered night light.
Oh, the steel mill had 250VDC distribution, as well as higher
voltages for the overhead cranes and welders.
I once witnessed a plant electrician mistakenly wire a 120v 60Hz
water cooler to 250 VDC. The ensuing meltdown was fun to watch. His
boss told him to pack it back up and return it to stores with a tag
saying something to the effect that it was a manufacturing defect.
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