Motor Testing
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…
Common Sources of High-Resistance Connections
Electric motor testing is an excellent tool for identifying resistance unbalance. This instructional presentation will provide the most common locations for electrical connection anomalies...
- Don Donofrio
- The Snell Group
Inductive Imbalance in a Wound Rotor Motor
Testing wound rotor motors can be tricky depending on what and where you are testing. In this quick tip, see what rotor motors are used for and how to perform a test...
- Noah Bethel
- PdMA Corporation
Fault Localization Using Electrical Signature Analysis
When conducting Electrical Signature Analysis on a motor circuit you may find numerous spectral peaks in the FFT. This instructional presentation provides a means to localize the origin of the voltage and current distortions represented in the spectral data...
- Don Donofrio
- The Snell Group
Importance of Checking Amp Probes Prior to Data Collection
In this presentation we will discuss the many different options available when checking amp probes, which include current monitoring, balance loading, FFT…
- Don Donofrio
- The Snell Group