Quote:
Originally Posted by Xringer
Is that labeled as a 220v~ 3,000 amps??
That's not really going to work with a 0.66 megawatt load is it? 
What uses that much power??
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An AC~ breaker that had large self-wiping contacts and
a good air-gap when open might to the job on DC.
You could try it.
On any kind of switch for DC power switching,
one thing you want is speed. It's going to arc anyways,
but if you minimize the time it's arcing, the contacts will last longer. |
Circuit breakers designed for breaking AC currents use the fact that AC current goes thru zero every half AC cycle. Thus arcing is short and less destructive allowing relatively small contact seperation.
Not so for DC contacters and circuit breakers. They normally use larger and faster contact seperation and often employ magnetic arc blow out devices and power factor correction.