COMPLETE VICTORY over the transformer!

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Ignoramus17720 14 years ago

I spent a whole day messing around with the transformer.

The first disappointment was that even at the lowest count of turns tap, the transformer would put out 511 volts, which is way too much.

After some frustrated thinking, I realized that I could pull out the outer winding a bit and tap into it with a split bolt.

After a little bit of work with a calculator, pulling the aluminum winding a little bit, trip to McMaster Carr, putting everything together and applying Noalox, I ended up with a transformer with a more suitable turns ratio on the secondary.

The output from the transformer is 476 volts, which is pretty good.

After a little bit of tidying up, I took a picture.

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I now have a nice 45 kVA transformer, with a nice 60A disconnect on the output side, a nice "hi quality" input cable etc.

I am SO F****NG HAPPY, like someone else would be with a Mercedes Benz car.

I immediately went on and tested the 460 volt 3 ton coffing hoist, which, no surprises, worked great like it is supposed to.

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Pete C. 14 years ago

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Your custom unwinding and tap modification on the transformer voided it's UL listing. Be sure you only ever have it powered when you are testing something, if it were to go poof in the night and burn your building down, your insurance would likely not pay.

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Spehro Pefhany 14 years ago

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How is going to go "poof"? It's encased in a steel box.

Best regards, Spehro Pefhany

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Ignoramus8679 14 years ago

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Does a dry type transformer actually have any combustible materials?

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Michael A. Terrell 14 years ago

One caught fire in the transformer vault at my highschool one summer. It powered the newest wing of the school, and you could still smell it, two years later.

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azotic 14 years ago

Be very carefull.

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Best Regards Tom.

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karltownsend.NOT 14 years ago

...

Exit stage right may be outside Iggy's knowledge base also

Karl

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Ignoramus8679 14 years ago

At some point, I did not even know what a "third base" was. But I knew how to get there.

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Jim Wilkins 14 years ago

In the fairytale version Door 3 may be hiding a hungry tiger.

jsw

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Michael A. Terrell 14 years ago

How do you suggest that they fill a dry transformer with oil?

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Tom Del Rosso 14 years ago

Ok, so you could see it well enough in the "vault". I thought a big installation like that would have the same type I have on my pole. Maybe because my high school had 3000 students.

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Chrissy Degeer 14 years ago

You f****it: he's suggesting that it *wasn't* a "dry type transformer" in the first place.

What the f*ck is wrong with you?

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Ignoramus8679 14 years ago

Also, I never watch TV.

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Jim Wilkins 14 years ago

Confusion from literary allegories can be dangerous in diplomacy. When a Russian quoted the line about horses and men pressed together from Lermontov's "Borodino" to imply a confusing situation it took us a while to figure out what he was talking about.

jsw

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Ignoramus8679 14 years ago

So true!

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Larry Jaques 14 years ago

Not even, boyo. That was Bachelor #1, Bachelor #2, or Bachelor #3.

It was Let's Make a Deal's winners who got to choose between the doors.

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-- It takes as much energy to wish as to plan. --Eleanor Roosevelt

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Ned Simmons 14 years ago

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Ignoramus8679 14 years ago

By the way, we are having a lively discussion about this transformer, at mikeholt forums.

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Michael A. Terrell 14 years ago

So what? Ours was about half that size and had three transformer rooms, one in each wing. The transformer that failed was two years old, and the largest on campus. It took Westinghouse six months to built the replacement, and have a crane brought in to place it into the vault.

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PrecisionmachinisT 14 years ago

Yup, I saw that....

--pretty sure there's an old uncased transformer I salvaged from an old welding machine some years ago that's still kicking around here someplace myself....

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COMPLETE VICTORY over the transformer!

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