240V AC power switch - based on current drawn from outlet

I use one of these on my SCMS and shop vac:

I douldn't want my dust collector cycling that often so use a remote control for it:

Your second part is not practical with a typical single-phase induction motor. If your dust collector is three-phase unit, it's possible, though it may not be desirable - slowing a dust collector down can result in dust dropping out in the lines - the system should be designed to maintain a particular velocity inthe collection liones, and slowing it down will mess with that.

The second part is available off the shelf as a commercial product. An easier (and cheaper) solution is to put switches on the blast gates (you do have blast gates, one hopes) and connect them to a relay that turns on the dust collector.

I have designed one that consisted on a toroid with 2 windings. The first with only a few turns that was in series with my TV power and a secondary that would operate a relai that would switch on the lights when the TV was ON. With the latest large TV types we don't need it because the TV illuminates the room.

John Taylor

Conclusion: My server has good retention

John

Then maybe you can find the schematic/pictures/write up I posted in late 2006 showing how to hack a GFCI to make a load sensing switch like the op wanted.

Ed

How good? Giganews goes back to 2003.