Digest, Vol 21, Issue 10 3 Phase Testing Power
SVCatITC at aol.com
SVCatITC at aol.com
Tue Jul 11 13:57:12 EDT 2017
I'll put in my $0.02.
Having been an industrial electrician for a couple of years back in the
1970's I might know
a thing or two. I worked in a wire drawing mill where 208 Y and 480 Y 3
phase were common
voltages we worked with every day.
If you want to discuss more info on the project you are working on, feel
free to contact me
off list. My only caution is to insure safe signal return commons to the
power lines you are working
on, along with proper insulation of your phase line current transformers.
Depending on how
the power is brought into your facility, and how old the facility is, the
grounds can be VERY
Although I am not trying to volunteer him, Bill Dromgoole may be another
resource to contact
as he just made up a breadboard to load up the 3 phase 400 cyle MG set
for the Univac
targeting computer. That shipboard power was part of his "bread & butter"
when he was working.
In a message dated 7/11/2017 12:02:05 P.M. Eastern Daylight Time,
vcf-midatlantic-request at lists.vintagecomputerfederation.org writes:
Date: Mon, 10 Jul 2017 14:01:01 -0400
From: Ben Greenfield <ben at cogs.com>
<vcf-midatlantic at lists.vintagecomputerfederation.org>
Cc: Herb Johnson <hjohnson at retrotechnology.info>
Subject: Re: [vcf-midatlantic] Off topic-testing 3 phase power
Message-ID: <850FDE4F-74C2-471D-A3C4-BF8A74D9C38E at cogs.com>
Content-Type: text/plain; charset=utf-8
The only thing I can say in my defense is that one can be both naive and
have respect for electricity.
As for a professional, I have one involved. Unfortunately my natural
curiorsity keeps me from being passive during integration of this project.
I could have gotten into all sorts of esoteric details about what I?m
really trying to troubleshoot but I really wanted a simple answer, which I got
from Bill Dudley. Bill?s answer was simple and re-enforced my beliefs on
Regarding testing equipment. I believe the Fluke I referenced was proper
testing equipment and I wanted to see what others thought. I included a link
to it?s page it is rugged 4 channel 100 Mhz portable oscilloscope. This
looks like the ultimate tool for this type of work and I wanted to know what
I followed list guidelines by marking the post off-topic. I felt it was a
fair question in a hacker environment and I thought others may have first
hand experience they could share.
I was satisfied with answers I did receive and I love that the list exists
as resource for hacking questions for all sorts of technology.
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