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From: "Charles Perry"
Subject: Re: Interference from power lines
Date: Tue, 7 Jan 2003 19:48:21 -0500
References: <3E1B11AA.CEB7690A@hotmail.com> <3E1B6FCC.18B42DC4@hotmail.com>
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"w_tom" wrote in message
> Couldn't find pontoons big enough for the building - or just
> looking for an economically reasonable solution?
> This is a most interesting problem. What other solution
> could even be considered? Could degaussing coil of 15 amps
> even be sufficient to neutralize such a magnetic polarity?
I really don't know. This was handled by the company I currently work for
before I came to work here. I worked for a midwestern utility at the time
but knew most of the people I currently work with. The power quality
industry is quite small. The customer was convinced that the utility was to
blame. The utility suggested moving the computer equipment but the customer
was sure that the utility needed to do something. The engineers that
investigated it for us, along with the utility, actually switched off an
entire distribution circuit (while providing power to the monitors via a
UPS) to prove it was not them. EMF measurements were a problem since
utilities usually have emf meters that are good at 50, 60, and 400 hz but
I am not sure what a more permanent solution might be. Once the customer
realized it was their building causing the problem, they were not interested
in any costly solutions.
Charles Perry P.E.
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