Automatic Thermal Overloads
Automatic Thermal Overloads
(OP)
I am looking for information on Automatic Thermal Overloads (ATO), specifically on installation. What is the best location and how do they actually work? I have looked at websites for manufacturers and cannot find any detailed information. Any information is welcome, links to websites are welcome as well.





RE: Automatic Thermal Overloads
I have never used that feature - have always had the overloads be reset manually. I have done that since if the motor tripped out on OL, there's usually a reason. By keeping the reset a manual action, someone has to physically go there, look at motor (smell, feel, observe), reset OL's, restart motor. If not further tripping of OL - fine. If trips again - get electrician and take amp readings, compare with nameplate, etc.
RE: Automatic Thermal Overloads
RE: Automatic Thermal Overloads
If this is what you are interested in just do a search on Google for snap switch.
Above 2 hp I only know of sensors used in large submersible sump and sewage pumps. I know little about that application.
Richard Neff
Irrigation Craft