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

1. Mobius Institute Category 1
Chapter 2

2. Mobius Institute Category 1
Chapter 2
 Infrared Thermography
 Electric Motor Testing
 Oil Analysis
 Wear Particle Analysis

3. Condition Monitoring
Infrared Thermography

4. Infrared Thermography
Infrared
Thermography
Concept
Devices
• Spot
Radiometer
• Infrared
Camera
Application
• Mechanical
Equipment
• Electrical
Equipment

5. Heat Transfer Modes
 Conduction
 Convection
 Radiation
Radiation
Conduction
Convection

6. Infrared Camera
Infrared
Camera
1.
Emitted
Heat
2.
Reflected
Heat
3.
Transmitted
Heat

7. Conclusion
Conclusion
Reliable
measurement
Advantage/
disadvantag
e

8. CONDITION MONITORING
ELECTRIC MOTOR TESTING

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. 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. 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. 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. 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. CONDITION MONITORING
Oil analysis and Wear particle analysis

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. 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. Wear Particle analysis
Corrosive
Wear
Sliding Wear
Cutting Wear

18. Oil Analysis vs Wear Particle Analysis