From SROYS@radiology.ab.umd.edu Fri Oct 20 09:12 MDT 1995
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To: tesla@grendel.objinc.com
From: "SROYS"  <SROYS@radiology.ab.umd.edu>
Date:         Fri, 20 Oct 1995 10:56:12 EDT
Subject:      Re: Contactor questions

> This should be ok as you will probably be using a variac to power the 
> system.  When you energize the contactors, the variac shold be off 
> and very little current will flow.  You won't have many amps flowing 
> until you get the variac up to full power.

This is the mode of operation that I will employ.  In the case of a 
runaway system, I will (hopefully) have the presence of mind crank the 
variac down before hitting the "panic" button to open the contactors.  
That way, I can prevent things from welding shut and "letting a bunch of 
Clydesdales romp and play".

I can't see this even being a problem for now since I'm sure that I will 
be running under 30A for a while.  By the time I work up to the 50A plug, 
I will probably have picked up some heavier duty contactors.


Steven Roys (sroys@radiology.ab.umd.edu)


