Motor Testing
Two Minute Tips
Determining the Number of Poles and RPM
Give me the number of poles and I can tell you the RPM; give me the RPM and I can tell you the number of poles. This instructional presentation discusses the formulas related to determining theses values...
- Don Donofrio
- The Snell Group
Articles
Getting Started
Welcome to the home of condition monitoring; CBM CONNECT! The site is designed to provide you with educational articles, videos, and podcasts...
- Jason Tranter
- Mobius Institute
Interviews
The Keys to Developing an Effective EMT
Personal preparation is one of the most important factors in starting a motor testing program. It probably takes me 20 to 30 minutes in the evening to set up my equipment and get it ready to go. I make sure everything is charged up...
- Don Donofrio
- The Snell Group
Interviews
Rotor Anomalies
In this interview, Don will share how to identify and confirm motor anomalies with electric motor testing. Listen to Don as he shares is background knowledge in Motor Testing…
- Don Donofrio
- The Snell Group
Five Minute Facts
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
Two Minute Tips
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
Two Minute Tips
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
Two Minute Tips
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
Five Minute Facts
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
