Taking apart a large transformer

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wrote:

I was referring to what another poster wrote:
On Tue, 4 Jan 2005 10:13:33 +1100, "john johnson"

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You quoted me and answered my post in the thread.

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Thank you. Keep scratching. Be happy. Go back to sleep.
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They were intentionally used. As I understand it, PCB revolutionized the transformer and capacitor industry when they were introduced. I seem to recall that they were an excellent dielectric and had a very high flash point, so fire hazards were reduced. They were a purpose made substance sold under various trade names.

to come directly in to focus. Years ago I was given a "free" induction furnace power supply. The donor had me sign a waiver because the supply had a mercury spark gap included, but failed to mention that the transformer, along with the huge capacitors, were filled with PCB's. The law as stated at that time dictated that if any PCB filled device started leaking, it was mandatory for the item to be disposed of by within thirty day by proper procedures. I had to transport the power supply from one state to another, and when it got there there were multiple wet spots from the escaping PCB. Long story short, I talked to EPA to find out where I stood and found out that it was illegal to dispose of such items by passing them on to others, so I called the "donor" and informed him that he had a serious problem on his hands. Disposal cost ran right at $3,000 for 800 pounds of transformer and capacitors, which was born by the donor. Don't take PCB's lightly.
Harold
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I have some large capacitors also, how do I know if they have PCBs?
i
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labelled with a date code; anything prior to 1973 will contain PCB.
If you care to post all the capacitor label information here, I can probably determine yes or no.
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See the UPS nameplate at
http://igor.chudov.com/tmp/ups-label.jpg
I will post a picture of the capacitors. My hunch is that the UPS was made in the 1990s. I think that I saw 1995 somewhere inside.
i
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You mean all the research was not fiction created by left-wing atheist tree-hugging hippies? :-)
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Jon Danniken wrote:

I'm not Doug, but oil is used in larger transformer for cooling. PCBs were added to improve heat transfer. I have no idea what the smallest size of oil filled transformers are but larger ones are way bigger than 200 pounds. 8KVA may be a little small for an oil filled transformer.
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George E. Cawthon wrote:

Geez ig. You sure stirred up a hornets' nest here. Getting to be one of those long (remembered) threads. BTW what program/workflow gets those photos on line so fast? I Emailed you at both addresses you posted but have had no reply. Still interested in that starter motor?
Regards. Ken.
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Ken, I use my own perl script to index photos. Here it is. As for a starter motor, I think that all my motored stuff works well by now...
=====================================================================#!/usr/bin/perl
sub index_dir { my $dirname = shift @_; my $title = shift @_ || "\u$dirname"; opendir( DIR, $dirname );
print STDERR "Indexing '$dirname'...\n";
# system( "mv -f index.html index.html.old" ); # system( "mv -f full.html full.html.old" ); print "opening $dirname/index.html\n"; open( INDEX, ">$dirname/index.html" ) || die "cannot open index.html"; open( FULL, ">$dirname/full.html" ) || die "cannot open full.html";
my $prefix = " <HTML><HEAD><TITLE>$title</TITLE></HEAD> <BODY BACKGROUND=
http://igor.chudov.com/images/backgrounds/bg1.jpg "; $prefix .= "<H1>$title</H1>\n\n" if $title ne "."; $prefix .= "Click on the thumbnail images to enlarge<BR>\n"; print INDEX $prefix;
my $intro = "$dirname/intro.txt"; if ( -r $intro ) { open( INTRO, $intro );
while ( <INTRO> ) { s/CURRENT_DIRECTORY/$ENV/g; print INDEX; } }
if ( !$with_pix ) { print INDEX "This is the index of pictures. <A HREF=full.html>Click here to see all of them at once.</A> (takes a while to load.\n"; }
print FULL $prefix . "This is the full index of pictures. <A HREF=index.html>Click here for the filename list</A> (fast loading.\n\n";
my @files = (); my @subdirs = ();
my $fn;
while ( $fn = readdir( DIR ) ) { if ( ($fn =~ /^(.*)\.jpg$/i || $fn =~ /^(.*)\.jpeg$/i || $fn =~ /^(.*)\.gif$/i ) && !($fn =~ /^-/) ) { my ($dev, $ino, $mode) = stat( "$dirname/$fn" ); if ( $mode & 0x04 ) { # readable by world push @files, $fn; }
} elsif ( -d "$dirname/$fn" ) { if ( !($fn =~ /^\./) ) { push @subdirs, $fn; } } }
my $start = ""; if ( $dirname ne "." ) { $start = "<A HREF=../><IMG SRC=/images/up.gif BORDER=0>Back</A><P>\n"; }
foreach $fn (sort @subdirs) { $start .= "<B><IMG SRC=/images/star.gif> <A HREF=$fn/>\u$fn</A></B><BR>\n"; } print INDEX $start;
foreach $fn (sort @files) { if ( ($fn =~ /^(.*)\.jpg$/i || $fn =~ /^(.*)\.jpeg$/i || $fn =~ /^(.*)\.gif$/i) && !($fn =~ /^-/) ) { $name = $1; } my $text = ""; if ( open( ANNOTATION, "$name.txt" ) ) { while ( <ANNOTATION> ) { $text .= $_; } close( ANNOTATION ); } else { $text = $fn; }
if ( $with_pix ) { my $tn = "-THUMBNAIL.$fn"; if ( ! -f "$dirname/$tn" ) { print "Converting $fn to $tn...\n"; system( "convert -geometry 20%x20% $dirname/$fn $dirname/$tn" ); } if ($text ne $fn ) { print INDEX "<TABLE BORDER=2><TR><TD><A HREF=$url$fn TARGET=full_pic><IMG SRC=\"$url$tn\" ALIGN=MIDDLE BORDER=2></A></TD></TR><TR><TD>$text</TD></TR></TABLE>\n\n"; } else { print INDEX "<A HREF=$url$fn TARGET=full_pic><IMG SRC=\"$url$tn\" ALIGN=MIDDLE BORDER=2></A>\n\n"; }
} else { print INDEX "<HR><A HREF=\"$fn\">$fn</A>\n\n"; if ( $text ne $fn ) { print INDEX $text . "\n\n"; } } print FULL "<HR>$text<BR><IMG SRC=\"$fn\">\n\n"; #print "Processed $fn...\n"; }
close( INDEX ); close( FULL ); closedir( DIR );
foreach $fn (sort @subdirs) { index_dir( "$dirname/$fn" ); }
}
$url = $ENV;
$with_pix = 0; if ( @ARGV[0] eq '--with-pix' ) { shift @ARGV; $with_pix = 1; }
index_dir( ".", @ARGV[0] );
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Cool, how do you use it, ie. where do you run the thing and with what parameters, I'm familiar with perl but haven't taken your script apart yet :-)
/Morten
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I run it under linux, in the directory where the photos are. I run it like this:
index-pix.pl --with-pix "Picture Index"
that creates thubmnail pages and goes through all subdirectories recursively.
i
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Nice indeed, but it falls apart when using filenames with spaces in them :-O
Where did you get the convert utility from, it's not installed on my system and it's not on the install discs either, could you mail to me or post a url somewhere...
I've corrected the missing string encapsulations and are going through the script to make a little more HTML compliant, ie. add a </body> and /<html> and a few other bits, I'll post my version here when I'm finnished molestring it :-)
Regards
Morten
ps: You can mail me at mormordogs at zorland dot netdogs but please take out the dogs first, they need attention to :-)

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Great point. Look at 'system' call invocation, you can put single quotes around the filenames.

It is a part of the ImageMagick package.

Cool, wonderful!
i

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Thats almost what I did, I put any strings into \" and that solved the issue...

Yes, I know I just found it and installed it, so now that part works as well :-)
/Morten
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I hope that you can make good use of my script.
When I need to create a picture webpage I do this:
cd public_html/tmp mkdir MyDir cd MyDir gp # this gets pictures from the memory stick, my own script i-p # alias of the index-pix script
gp involves editing images with xv, which is extremely fast due to good ergonomics (use of keyboard). All I do is cropping and resizing.
i

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Ignoramus28225 wrote:

That works well. I saved it as a text file, then did a chmod a+x on it. One suggestion would be to have it name index.html as AAAindex.html, or something like it. That way, it shows up at the start of the folder and searching through the files.icons in alphabetical order isn't needed.
Does your site keep a log of who downloads the background image?
mike
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It should not be difficult to change, look at line 13.

It does, but I could not care less who downloads it.
i
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On Mon, 3 Jan 2005 10:37:23 -0800, "Jon Danniken"

Jon --
Let me try to answer your last question. I'm no transformer expert, but I worked in power plants my entire career. I know just enough to be dangerous.
Generally speaking, large power transformers used PCBs. The liquid in the transformer acted as a coolant that carried away heat to heat exhangers of one kind or another. Most of them rejected their heat to water or atmospheric air.
One of the ways to classify transformers is by their method of cooling. O/A were oil/air cooled. O/W were oil/water cooled O/A/F were oil/air/fan, etc. (I might be incorrect on that last one. It might be O/FA.)
The PCBs were valued for their fire-suppressant properties. Thus, if a transformer ever blew up there wasn't so much danger of fire.
Long before the days of environmental consciousness, folks who could get their hands on transformer oil (PCBs) would slather it onto the wood shingles on their houses. Not only would it help preserve the wood, it would act as a fire supressant.
Regards,
Orrin
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