PdMA - A Leader in Electric Motor Testing
  Tip of the Week Archives
  Product Support Manual

ISO Certication 9001
You Tube
Visit our You Tube channel.
Linkedin Logo
Join us on Linkedin.


Tip of the Week

One Step at a Time

The MCE® Step Voltage test was designed to be an over voltage test primarily used for troubleshooting ground wall insulation issues on low voltage motors. Although some analysts use it for quantitative comparison to locally established ground wall current limits on medium voltage motors, it is most commonly used following an acceptable Resistance-To-Ground (RTG) reading where remaining doubts about the insulation system prevail. A perfect example would be following a motor trip. If after the motor trips, the RTG test indicates that the insulation system is acceptable for continued operation but the analyst does not agree, then a controlled over voltage test can be performed to further alleviate any concerns. PdMA recommends starting with a Polarization Index test with the initial voltage level being equal to or less than 30% of the maximum test voltage. Once the insulation resistance and polarization index indicate the insulation is suitable for over voltage testing, the controlled over voltage step test can commence.

To see a variety of insulation related case studies visit the PdMA YouTube Channel at:


Submit an Electric Motor Testing Tip of your own and receive a free PdMA mug or hat if we publish it! Contact Lou.



One Step at a Time
June 19, 2017
Click here to read more.

Click Here to Read More Tips

Learn More - Videos

Click on a topic below to watch a short video of the subject.


Fault Zones
Power Circuit Fault Zone
Power Quality Fault Zone
Rotor Fault Zone
Stator Fault Zone
Air Gap Fault Zone
Insulation Fault Zone

Case Studies
Click Here to View Case Studies


PdMA Announces the Release of PdMA Cloud Services
To read more about the release click here.

2017 Training Schedule Posted
The PdMA® training schedule for 2017 has been posted.
Click here to view the schedule

PdMA® Corporation Releases MCEGold® 3.0
To read more about release click here

2014 Best Asset Condition Management Program Winner
Click here to read about the winner.

PdMA® Corporation Releases MCEGold® 2.6.2
To read more about release click here.

Announcing the New M-Series MCEMAX® Tester
To read more about the release click here.

Introducing MTAP3
The affordable MTAP3 offers the ability to safely capture data in many of the smallest enclosures where the MTAP2® cannot be installed.
Click here to learn more.

Click Here
to Read More News.