Two Minute Tips
Motor Base Installation Procedure
Adjustable motor bases and rails are available in a variety of sizes that accommodate most motors. These bases are an easy and great solution as they simplify installation and offer adjustments for alignment and tensioning..
- Mike Olszewski
- Reliability Concepts
You Have Water Where?
For many of us it’s the rainy season and with that comes elevated concerns about the insulation integrity of our electric motors and generators. .
- Noah Bethel
- PdMA Corporation
Rotor Bar Analysis Using Electrical Signature Analysis
Broken or fractured rotor bars are found as elevated Pole Pass Frequency (PPF) sidebands of line fre- quency (LF). PPF is calculated using the synchronous speed minus the running speed times the number of poles..
- Mark Koch
- ALL-TEST Pro, LLC
Trend Is Your Friend
Troubleshooting a motor without historical data to reference for a change in baseline, or a gradual trend up or down can be a difficult task. Troubleshooting a motor without historical data to reference for a change in baseline, or a gradual trend up or down can be a difficult task..
- Noah Bethel
- PdMA Corporation
Troubleshooting the Rotor and Air Gap on a De-energized Motor
Today we look at troubleshooting techniques and considerations on a de-energized motor for the rotor and air gap fault zones. One of the measurements taken during the five-minute MCE® standard test is inductance, and with the three phases of inductance, inductive imbalance is calculated.
- Noah Bethel
- PdMA Corporation
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..
- Noah Bethel
- PdMA Corporation
Troubleshooting a Running Motor
This tip discusses troubleshooting the motor and machine train with the motor still running. The fault zones specific to the physical motor are the stator, rotor and airgap....
- Noah Bethel
- PdMA Corporation
Static Eccentricity Faults Using Electrical Signature Analysis
Static Eccentricity (air gap) is a fault that is created when the rotor is not in the magnetic center of the stator. Static eccentricity can cause an increase in operating current, overheating, energy losses, and overloading of bearings...
- Mark Koch
- ALL-TEST Pro, LLC
Delaying End of Life
Everything, including motors, has an end of life. Our reliability goal is to identify conditions conducive to failure and correct them so the end of life doesn’t come early...
- Noah Bethel
- PdMA Corporation