Originally Posted by
Ian Scofield
Like he said above, if you let it run with all the blast gates open, aka with zero resistance, then the impeller will continue to speed up and speed up since there's no force working against it. When that happens, the motor burns up because it's spinning way faster then it's designed.
Conversely, if there's way too much load, IE all the blast gates are closed, you're creating a vacuum because the dust collector is attempting to pull air through your ducting but nothing is moving because there's no new air being pulled into this system. Therefore the dust collector draws more and more current until it trips the breaker.