Very good info and video - but I have worked in mills for over 30 years and have done the PI test many times on 480VAC and 250VDC motors and I always came up with the same values the one minute test point and the ten minute test point- not sure why - and these were all documented as I had another electrical person with me to record the readings - We quit doing the PI test on the low voltage motors cuz it didn't seem to have any value if we always get 1 for the result. Any comments?
Thank you for sharing your experience and feedback! It's interesting to hear about your observations with the PI (Polarization Index) test. The PI test is primarily designed to assess insulation quality, and a result of 1 typically indicates no improvement in insulation resistance over time. For low-voltage motors, the shorter charge time of insulation capacitance often leads to consistent readings at 1, making the test less useful in these cases. This could explain why you observed no variation in results. For low-voltage motors, other tests like insulation resistance (IR) or advanced diagnostic tools (e.g., surge testing) might provide more actionable insights. Thanks again for your input, and let me know if you'd like to discuss this further!
Excellent piece of cake explanation ya Engineer 👌😊 بالتوفيق دائما يا رب
@@ahmedabbas569 تسلم يا هندسة علي الدعم❤️❤️
Very good info and video - but I have worked in mills for over 30 years and have done the PI test many times on 480VAC and 250VDC motors and I always came up with the same values the one minute test point and the ten minute test point- not sure why - and these were all documented as I had another electrical person with me to record the readings - We quit doing the PI test on the low voltage motors cuz it didn't seem to have any value if we always get 1 for the result. Any comments?
Thank you for sharing your experience and feedback! It's interesting to hear about your observations with the PI (Polarization Index) test.
The PI test is primarily designed to assess insulation quality, and a result of 1 typically indicates no improvement in insulation resistance over time. For low-voltage motors, the shorter charge time of insulation capacitance often leads to consistent readings at 1, making the test less useful in these cases. This could explain why you observed no variation in results.
For low-voltage motors, other tests like insulation resistance (IR) or advanced diagnostic tools (e.g., surge testing) might provide more actionable insights.
Thanks again for your input, and let me know if you'd like to discuss this further!
Excellent pro ❤❤👏💪
❤️🙏
Could a value of 1.5 to 1.9 randomly cause a breaker to trip?
No, this is poor value but not dangerous, still have a good form of insulation