You guessed it. Excessive temperature is the #1 killer of electric motor insulation. However, not always does the remaining evidence lead the investigator to the root cause. So what could be the root cause of excessive heat? High resistance connections, severe rotor bar defects, improper ventilation, poor power quality, etc. With so many root causes resulting in high temperatures it is no wonder heat is the #1 killer of your electric motor. Get a handle on these root causes with your pdm technologies and you will get a handle on the heat. Info courtesy of our friends at PdMA.