Polarization Index

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Two Minute Tips
  • Motor Testing

Troubleshooting a De-energized Motor

In this tip we look at troubleshooting techniques and considerations when a motor is not running (de-energized), requiring controlled test signals to be sent into the motor..

White Papers
The Trifecta of Motor Maintenance by Noah Bethel | PdMA Corporation
  • Motor Testing

The Trifecta of Motor Maintenance

Using the same concept of a trifecta (three factors for success), this article provides companies with the winning strategies of motor maintenance, focusing on the three reliability tasks for electric motor testing and the order in which they should be applied.

10 Minute Talk
Polarization Index Profiles
  • Motor Testing

Polarization Index Profiles

A polarization index is a 10-minute timed insulation test using a megohmmeter to measure resistance to ground. If you plot or graph the results incrementally, it will give you a profile of the resistance to ground. There are five distinct patterns that we'll get...

Articles
  • Motor Testing

The Importance Behind The Addition of Annex D In IEEE Standard 43-2013

The standards working group behind the present edition of IEEE Std 43 made significant changes in the overall standard, including modifications to temperature normalization to 40°C. This was done to accommodate the many changes and observations in insulation chemistry and combinations over the past decades...

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