Motor Testing
Rotor Bar Fault Progression with Load
Rotor bar anomalies are difficult to identify and when they are identified the available data can be confusing and misinterpreted. This instructional presentation describes what effects load will have on spectral data associated with rotor bar anomalies.
- Don Donofrio
- The Snell Group
Understanding Crest Factor
Crest Factor is a parameter often displayed with power analysis data for voltage and current. This instructional presentation will give you an understanding of what Crest Factor is...
- Don Donofrio
- The Snell Group
The Heat Is On!
As summer nears, thoughts of extreme heat and humidity start to enter our minds. Heat and humidity are not friends of the electric motor…
- Noah Bethel
- PdMA Corporation
Failure to Launch
Starting a motor across the line can generate 7-10 times (or more) the normal full load amps and create extreme torque stress on the shaft line components. In addition to these normal stresses on the electrical and mechanical elements of the motor, protection systems like overload...
- Noah Bethel
- PdMA Corporation
Determining CT Ratios Through 3 Methods
When performing energized motor testing on medium and high-voltage motors, you do not want to attach amp probes. It is important to calculate the ratio of step down from the primary current to the user current. You will use CT ratios...
- Don Donofrio
- The Snell Group
Automotive Manufacturer Compares In-House Third-Party Motor Testing. Guess Which One Saved the Most Time and Money?
Catching motor problems before they fail saves your plant headaches, not to mention a ton of money they would have lost through unplanned shutdowns. View the lessons learned by manufacturers who needed reliability programs...
Multiple Faults with an Induction Scrubber Motor
Loss of production can be big if the scrubber is down. See how to solve a high-resistance connection and a resistance-to-ground problem...
- Noah Bethel
- PdMA Corporation
Failure to Start? What’s Next?
If your motor fails to start, what actions do you immediately take? There are a variety of possibilities and questions that come to mind to help you in the right direction ...
- Noah Bethel
- PdMA Corporation
Motor Testing MCA vs Megohmmeter
Traditional Megohmmeter testing will only detect faults to the ground; however, not all motor electrical stator winding failures begin as ground faults. View this quick tip to see if you have the right testing methods…