Reply by MrUnix

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Posted on Powermatic 66 table saw 5hp 1 phase On/Off

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7498 posts in 2732 days

#1 posted 01-29-2019 03:47 AM

The thermal switch IN the motor opens when the motor overheats. The HEATER in the starter heats a thermal switch which trips when the motor amperage draw is too high. Both are needed.
- ibewjon

Got to respectfully disagree… You will rarely find a Klixon protected motor from the factory on a machine with a starter. About the only time I’ve seen them is when a replacement motor has been installed, and it is not the OEM one it shipped with. The starter and Klixon both operate the same way, using a heating element whose temperature is controlled by the amount of current flow through it. It certainly doesn’t hurt to have both – more protection is a good thing – but you don’t need both IMO.


-- Brad in FL - In Dog I trust... everything else is questionable

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