We did a thermal test of the Victor motor speed controller that is been underwater for 6 days! No leaks and all is operational!
We did a thermal test by keeping the motor shaft imobile and cranking up the current to about 22 amps and caused the auto reset breaker to keep tripping for about 20 minutes. We were only able to read a 1 degree temp increase on the surface of the epoxy resin with an underwater thermometer. The motor did get hot as well as the breaker.
We think maybe the heat was dissipated to the body of the epoxy and dispersed to the water.
