Mark Koch
Two Minute Tips
Condemning a Motor Using MCA™
Experience has shown that 20 to 40 percent of motor systems tested may have some sort of alarm condition. Just because a motor has exceeded the alarm limits in MCA Basic™ or MCA PRO™ it does not necessarily mean the motor will fail or should be stopped immediately. For over 30 years the dedicated staff at ALL-TEST Pro have gathered data and resources to determine when a motor will most likely fail on the most common 3-phase squirrel cage motors.
- Mark Koch
- ALL-TEST Pro, LLC
Two Minute Tips
Motor Storage
One thing that is typically overlooked is how spare motors are stored. Over time, moisture, dirt, dust, and even general vibration from other sources can have a negative impact on the electrical and mechanical condition on the stored motors.
- Mark Koch
- ALL-TEST Pro, LLC
Case Studies and Stories
Stator Looseness
A 6.6 kV motor that is used to cool the temperature of gas after going through a gas phase polymerization process at a Petrochemical plant was experiencing abnormal symptoms. A technician conducted a vibration test and noticed an abnormal vibration...
- Mark Koch
- ALL-TEST Pro, LLC
Webinars
Introduction to Electrical Signature Analysis (ESA)
Introduction to Electrical Signature Analysis (ESA). Find out how and where to implement ESA testing. Review examples of different electrical and/or mechanical issues.
- Bill Kruger
- ALL-TEST Pro
Two Minute Tips
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
