Rotor Bar

What’s New
Five Minute Facts
  • Motor Testing

Troubleshooting a Failed Induction Motor

The vibration team suspects a problem with a critical motor at a large pulp and paper facility. Watch this video and learn how the MCEMAX was used to diagnose a significant rotor fault and avoid a $120,000 cost.

Case Studies and Stories
Rotor Bar Fault Maintenance
  • Vibration Analysis

Rotor Bar Fault Maintenance Issue: Vibration Sensor Alert

A 398 KW MV motor that runs a blower fan in a cement plant was showing strange behavior. The vibration equipment indicated vibration amplitudes that became chronic with the passage of time. The maintenance team, not knowing what the issue was, ran the motor until the bearings had to be replaced...

Two Minute Tips
Electrical Signature Analysis Used for Rotor Bar Analysis
  • Motor Testing

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..

Case Studies and Stories
Vibration Analysis report of Broken/Cracked Rotor Bar
  • Vibration Analysis

Vibration Analysis report of Broken/Cracked Rotor Bar

In March of 2016, the vibration for Turbo Blower 2 was normal, but the motor temperature had increased. Ten days later, however, it was running rough with periodic noise...

  • Muhammad Trendo
  • Indah Kiat Pulp & Paper Perawang
White Papers
EMSDs for Condition Based Maintenance by Martin Robinson
  • Thermography

Bridging the Maintenance Gap to Condition-Based Maintenance Part II

EMSDs, along with data analysis and a new approach to maintenance called condition-based maintenance, can exploit the information age to not only bridge the knowledge gap, but to also improve the efficiency, safety, reliability and cost of electrical system maintenance…

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