Split Peak at the 5th Harmonic
When analyzing current signature analysis, like the PdMA EMAX Rotor Evaluation Test, the primary focus starts at the Pole-Pass-Frequency (Fp) sidebands around line frequency. Elevated Fp sidebands can be indicative…
Tip of the Week
Motor Repair and Inductance
Deenergized stator inductance is a valuable tool in identifying the internal magnetic condition of your electric motor. It is important to know that inductance measurements can be influenced by the…
Reliability Justification
We have all seen the Bathtub Curve and its application to equipment reliability. This curve shows a high failure rate early in life (Infant Mortality), low failure rate throughout the…
Tips for Installing Motor Test Access Panels
To minimize the risk of being in the vicinity of high voltage when testing your electric motors, your electric reliability team or plant safety management may have opted to install…
2022 Fault Zone Series: Part 6 Air Gap
Returning to the Fault Zone approach to electric motor troubleshooting we continue this series with Air Gap. When PdMA refers to the Air Gap Fault Zone, it is referring to…
2022 Fault Zone Series: Part 5 Rotor
Returning to the Fault Zone approach to electric motor troubleshooting we continue this series with Rotor. When PdMA refers to the Rotor Fault Zone in a squirrel cage induction motor,…
2022 Fault Zone Series: Part 4 Stator
Returning to the Fault Zone approach to electric motor troubleshooting we continue this series with Stator. When PdMA refers to the Stator Fault Zone in an electric motor, it is…
2022 Fault Zone Series: Part 3 Insulation
Returning to the Fault Zone approach to electric motor troubleshooting we continue this series with Insulation. When PdMA refers to the Insulation Fault Zone in an electric motor, it is…
DC Motor Field – Trend is Your Friend
When discussing motor reliability we often say “Trend is Your Friend”, and this is never more true than if you are troubleshooting a DC motor. A common beginning to troubleshooting…
2022 Fault Zone Series: Part 2 Power Circuit
Sticking to the Fault Zone approach to electric motor troubleshooting we continue this series with Power Circuit. A healthy Power Quality and a healthy motor can still be detrimentally influenced…
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