"Ignoramus5533" wrote in message
...
| I came into possession of a few used 400-600A circuit breakers. Each
| is the size of a milk jug. While researching prices on them and such
| (they sell for $150-200 on ebay), I learned that some cost many
| thousands of dollars new. I saw numbers from $2,500 and higher.
|
| I am curious just what makes them so expensive. Do they have any
| precious materials inside? Or what?
|
| i

There's a new kind out there now, which is wiping out the demand for the
older style. All amperages of the same body size of breaker are all the
same breaker, with a small module plugged in to control the trip point.
Folks love the low parts count. I've never priced them, but I was impressed
when I first saw 'em.
In that range, there's so few people that need them the economy of scale
keeps the price up, but I imagine that the used prices are really good.
Industrial customers usually don't tend to buy stuff like that used.