Reply by ibewjon

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

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1037 posts in 3330 days

#1 posted 01-29-2019 04:45 AM

I don’t know your background, but in over 40 years as an industrial electrician, I have hooked up dozens of motors where there is a temp switch IN a motor controlled by a starter. For a 3 phase motor, the switch is in series with the starter coil. A single phase motor with a magnetic starter would be wired the same. When the switch opens, on high temp, the coil drops out shutting down the motor. Most of the switches are bi metal, although there may be some that I have not seen that are a solder pot type. Remember that we are talking about an older high quality powermatic. The temperature switch would prevent the motor from overheating and igniting sawdust built up on the motor, especially in a school or industrial use.

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