Re: Sidereal Time Clock

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Article #9459

#9459

From: Richard S D'Ippolito
Date: Fri, 11 Jan 1991 18:15

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In article <3122@naucse.cse.nau.edu> Robert Wier writes:

 > I was suprised to learn when the plant was shut down that they didn't
 > disconnect from the grid (for example, to clean the pipes and
 > turbine valves).  They just let the grid power the generators as 
 > large electric motors.  Said it was a whole lot easier than trying
 > to bring them up from a dead stop and re-synch them to the grid
 > (which had to be done by hand).  

There's another reason that _very_ large horizontally-mounted generators are
never stopped -- if they sat there for a long time, the weight would cause a
permanent flat spot in the shaft and bearings!

Rich

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From: rsd@sei.cmu.edu (Richard S D'Ippolito)
Newsgroups: sci.electronics
Subject: Re: Sidereal Time Clock
Message-ID: <10012@as0c.sei.cmu.edu>
Date: 11 Jan 91 18:15:17 GMT
References: <3122@naucse.cse.nau.edu>
Reply-To: rsd@sei.cmu.edu (Richard S D'Ippolito)
Organization: Software Engineering Institute, Pittsburgh, PA
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