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Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
Hey all, yesterday me and Firefox from 4hv met at my local super secret junkyard in hope to find some good stuff. Sitting there in the bottom of a big steel crate were 2 identical 14400v 1500va Potential Transformers made by Westinghouse. We both took one and we got them for a very good price. We were unsure if they worked or not bu we figured it was worth the chance. I just tested mine out this morning and it is in good working condition. Here are some pics..... Im waiting for Firefox to post some pics of his but they are identical. Edit: here is a vid
Registered Member #1389
Joined: Thu Mar 13 2008, 12:50AM
Location: Pittsburgh, PA
Posts: 346
Heh, yep, I got one too. Just got home from Ohio, but I'll post some pictures when I get my hands on a working camera. All in all an awesome day, as I found a nice NST and some MOTs as well.
Registered Member #102
Joined: Thu Feb 09 2006, 08:15PM
Location: Raleigh, NC
Posts: 169
Haha mot's and NST's are nothing compared to PT's... Have you guys considered how much heavier these transformers are then normal 1500VA transformers? They probably have the core of a pig since they are literally the size as a 10kVA pig...
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
MOTs are designed to have the minimum iron and copper as they can get away with to reduce the costs. I would expect transformers that are made to operate at 100% duty cycle to be a lot larger than MOTs that are made to operate at a much lower duty cycle.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Myke wrote ...
MOTs are designed to have the minimum iron and copper as they can get away with to reduce the costs. I would expect transformers that are made to operate at 100% duty cycle to be a lot larger than MOTs that are made to operate at a much lower duty cycle.
On the contrary to popular belief, MOTs ARE made for continuous operation. They must be cooled with a fan, and will get VERY hot (100+ C), but they are made to withstand it, with a typical thermal rating of 200C. What sucks however is the efficiency.
Registered Member #1034
Joined: Sat Sept 29 2007, 12:50PM
Location: Chillicothe, Ohio
Posts: 154
That was a good find ! There is nothing like a good scrap yard. You never know what you will find and usually they charge you by the pound for whatever you get based on the price of the metal. We have a scrap yard where I live but they process everything as soon as it comes in so it isn't very good for scavenging.
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Potential Transformer Score
(because Westing House never got in Brazil 
)
