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Condition monitoring part 2


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Infrared Thermography, Electric Motor Testing, Oil Analysis,
Wear Particle Analysis

Published in: Engineering
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Condition monitoring part 2

  1. 1. Mobius Institute Category 1 Chapter 2
  2. 2. Mobius Institute Category 1 Chapter 2  Infrared Thermography  Electric Motor Testing  Oil Analysis  Wear Particle Analysis
  3. 3. Condition Monitoring Infrared Thermography
  4. 4. Infrared Thermography Infrared Thermography Concept Devices • Spot Radiometer • Infrared Camera Application • Mechanical Equipment • Electrical Equipment
  5. 5. Heat Transfer Modes  Conduction  Convection  Radiation Radiation Conduction Convection
  6. 6. Infrared Camera Infrared Camera 1. Emitted Heat 2. Reflected Heat 3. Transmitted Heat
  7. 7. Conclusion Conclusion Reliable measurement Advantage/ disadvantag e
  9. 9. ELECTRIC MOTOR TESTING  MOTOR LISTRIK : energi listrik ---> energi mekanik  Tujuan dilaksanakannya electric motor testing umumnya adalah untuk memastikan kondisi kesehatan dari mesin tersebut. 1. mendeteksi kondisi insulation. 2. mendeteksi electrical imbalances.  detect electrical condition 1. static/off-line test 2. dynamic/on-line test
  10. 10. Static/off-line test  Static/off-line test :  Performed when motor off or shutdown  Usually performed once a year.  Quality assurance tool.  New base-line of future trending.  Troubleshooting  Off-line test include :  Traditional test method  Insulation resistance testing (meg-ohm)  Polarization index  High potential resistance testing  Surge comparison testing.
  11. 11. Static/off-line test Traditional test method Insulation resistance testing Polarization index High potential resistance testing Surge comparison testing • Memerlukan aplikasi tegangan yang signifikan • Menekan sistem insulation • Tes insulation menggunakan dc voltage • Mengukur resistansi pada insulation • Variasi dari tes IR • PI= R10/R1 • Polarization current Tes resistansi menggunakan arus DC tegangan rendah, tujuan utamanya mendeteksi high resistance joints, loose connection, broken connection, dan direct short • Memonitor kondisi belitan dan insulasi. • Tes turn-to-turn, coil-to-coil, phase-to-phase insulation.
  12. 12. DYNAMIC/ON-LINE TEST  On-line test :  Performed when motor still on or operating  Can be performed daily, weekly, or monthly.  Condition monitoring.  Digunakan untuk mendeteksi  Winding shorts between conductor and coil  Winding contamination  Insulation to ground faults  Air gap faults, including eccentric motor  Rotor faults  Current analysis with current clamp.  Flux coil.
  13. 13. DYNAMIC/ON-LINE TEST  Current spectra.  Collecting current data on each power leg at the panel using current clamp.  Comparing the current from each leg.  Current spectrum can detect probability of broken rotor bars, uneven air gap, bowed rotor.  Flux coil  Used on the motor.  Collect data of the flux field generated by motor.  Indicate potential problems at the windings.
  14. 14. CONDITION MONITORING Oil analysis and Wear particle analysis
  15. 15. Oil Analysis Oil Analysis adalah tes yang dilakukan untuk mengetahui kondisi dari pelumas. Dan untuk mengetahui apakah terdapat kontaminasi pada pelumas tersebut. - Apakah masih bisa melakukan tugasnya dengan baik? - Apakah ada kandungan air atau kotoran? - Apakah ada logam atau unsur lain yang memberikan peringatan dini dari keausan. Tes yang dapat ditambahkan : - Visual Analysis - Smell
  16. 16. Oil Analysis Advantages  Dapat menentukan kondisi bahan aditif pada pelumas.  Dapat mendeteksi adanya kontaminasi dari fluida lain.  Dapat membaca adanya keausan partikel sampai 6 mikron. Disadvantage s  Tidak dapat membaca adanya “Abnormal Wear Particle”  Tidak dapat menentukan sumber dari keausan.
  17. 17. Wear Particle analysis Corrosive Wear Sliding Wear Cutting Wear
  18. 18. Oil Analysis vs Wear Particle Analysis