On Mon, 21 Apr 2014 05:19:26 -0500, The Daring Dufas
You can't use diodes for AC arc suppression. You are stuck with RC
networks and you have to be careful with your capacitor selection.
When switching big AC loads (10a or more) you usually end up with 440v
cans like you see for motor start capacitors. They need to be
carefully sized to the load.
Generally they will just use a big contactor that can live with the
I am using 2440 SSRs in my hot tub controller for a 2sp 3/4 HP motor.
On 4/21/2014 10:13 AM, firstname.lastname@example.org wrote:
I guess you may have misunderstood what I wrote. What you write is true
but it's not what I was referring to. I used to build my own solid state
motor controllers from scratch so I have a pretty good idea what will
work and what will burn up because I've burned up a lot of stuff to
learn what and what not to do. I call it on the job education. ^_^
As long as you are flowing some water that is true but if it truly
runs dry, heat is the enemy. A good part of the motor cooling is down
that shaft and the seal is depending 100% on the water.
I just had to replace a melted pump housing because it ran dry for a
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