- Advanced knowledge and skills - Be knowledgeable of vibration analysis and correction requirements. Be able to analyze data found in Level III.
- Understanding Complete Tests Performed On Induction Motors [PDF] There are many standards regarding testing of induction motors. Standards such as NEMA MG1, IEEE 112, IEC 60034-01 & -02, API 541, and IEEE 841 make recommendation as to what tests are required and how they should be performed.
- Insulation Resistance Testing: How Many Megohms Does it Take to Start a Motor? [PDF] IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery (IEEE 43-2000) identifies minimum values for insulation resistance of rotating machines.
- Polarization/Depolarization Current [PDF] IR/PI is a useful indicator of contamination and moisture on the exposed insulation surfaces of a winding, especially when there are cracks or fissures in the insulation.
- On-Line Fault Analysis of DC Motors [PDF] Many common faults such as shorted turns or commutator bars, grounded windings, and off magnetic neutral axis faults may be detected using on-line current and voltage signature analysis.
- Power-Factor Testing of Stator Winding Insulation: Understanding the Test Technique and Interpretation of Results [PDF] Power-factor analysis requires knowledge of both test circuits and the measured parameters. Each test mode involves a different portion of the insulation system.
- ETT Level 3: Rotating Machinery Review study material found in Level III.
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