I have a small fraction open air cooled motor with Nema Class B insulation. Kind of a silly question, but what would happen if I put a 4 inch test pin gently into the vented portion of the top of the motor while it was running? Would I be able to touch the windings? Even if I did touch the windings, there would be insulation on them providing basic protection against shock right?
Open Air Cooled Motor Protection
- Thread starter fifty60
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Conductor used for winding is insulated. It is generally pretty thin and mostly transparent material so it may look like bare copper.
If it were not insulated you would have short circuit from winding to winding and the motor would never work.
TEAO motors or any "air over motor" generally have no cooling fan integral to the motor. They are almost exclusively used for fans where the motor will be located in the air stream which will provide cooling for the motor.
The TEAO will likely have higher rated winding temp then an otherwise identical open type as it will not get any air flow through the interior of the motor, and will depend on conductively dissipating internal heat to the outer surface of the housing.
If it were not insulated you would have short circuit from winding to winding and the motor would never work.
TEAO motors or any "air over motor" generally have no cooling fan integral to the motor. They are almost exclusively used for fans where the motor will be located in the air stream which will provide cooling for the motor.
The TEAO will likely have higher rated winding temp then an otherwise identical open type as it will not get any air flow through the interior of the motor, and will depend on conductively dissipating internal heat to the outer surface of the housing.
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