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Thermovision Test.ppt

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Satish Pydimarla
Satish Pydimarla

This document discusses infrared thermography and its use for electrical inspections. Infrared cameras can detect higher temperatures that indicate potential problems in electrical systems. Regular infrared inspections allow issues to be found and repaired before failures occur, reducing downtime. Examples show temperature differences that would indicate repair priorities from immediate to monitoring. Infrared inspections are most effective when electrical loads are high and done periodically to inspect all equipment over time. Studies show infrared inspection programs typically yield a $4 return for every $1 spent by finding and fixing issues before costly failures.

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INFRARED THERMOGRAPHY ELECTRICAL INSPECTIONS . Thermographer Level II Recent technical manuals published by National Fire Protection Association (NFPA) and the Inter-National Electrical Testing Association (NETA) prominently recommend the use of infrared inspection in the testing and maintenance of electrical systems
Thermovision Test.ppt
Thermovision Test.ppt
Infrared Radiation . Wavelength is longer than visible light. Infrared waves are not visible by the eye
Infrared Thermography An Infrared Camera Senses Infrared Radiation A Processor In The Camera Assigns Color To The Infrared Radiation-Different Color Equals Different Temperature Enabling Us To Visualize The Thermal World
Thermovision Test.ppt
Thermovision Test.ppt
Infrared Image Color Palette Range Is Chosen For Clarity Color Palette 2 White = T>95F Black = T<72F Color Palette 1 White = T>85F Black = T<72F 1 2 Palette 2 Is Better Suited For This Image
Some Uses Of Infrared Thermography Electrical Inspections Hot Connections Failing Components Overloaded Circuits Mechanical Inspections Motors, Bearings, Drives, Steam Systems, Boilers Fire Hot Spots People Rescue Building Thermal Envelope Roof Leaks Military Medical Severe Acute Respiratory Syndrome (SARS) Manufacturing Processes Plastics Carpet Heat/Chilling Processes Mill Operations Slag Detection Police Work Fugitive Search Drug Enforcement Missing Persons Search Animal Equine Hot Joints Ligaments
Benefits of Periodic Electrical Infrared Inspections Predictive Maintenance...Allows Scheduling Of Repairs, Forward Buying Reduces Downtime Find It, Repair It, Before It Blows Up and Stops Production
Thermovision Test.ppt
Qualitative Infrared Electrical Inspection Exceptions: are abnormally warm components that may be a potential problem. Exceptions are usually identified by comparing the thermal patterns of like components. Qualitative Inspection: The practice of gathering information about an electrical system by observing infrared radiation, recording findings, analyzing findings, and presenting that information.
Electrical Inspection Items Transformer Pad Mount Dry Overhead Service Entrance Main Switchgear Motor Control Centers Disconnects Bus Duct Distribution Panels Control Panels Rectifiers Drives Capacitor Banks Any Electrical Connection
Exception Analysis Below is an exception. One of the conductor terminals is hot. Hot Terminal Temperature..203F Left Terminal Temperature.156F Temperature difference is 47F 119.7属F 179.5属F 120 140 160 AR01 SP01 When should you repair this exception?
Exception Repair Priority Criteria Priority 0 Temperature Difference 10F or Less No Corrective Measures Required At This Time. Priority 4 Temperature Difference Over 100F Corrective Measures Required Immediately Priority 3 Temperature Difference 30F to 100F Corrective Measures Required As Soon As Possible Priority 2 Temperature Difference 20F to 30F Corrective Measures Required As Scheduling Permits Priority 1 Temperature Difference 10F to 20F Corrective Measures Required At Next Maintenance Period
Thermovision Test.ppt
Thermovision Test.ppt
Thermovision Test.ppt
Thermovision Test.ppt
Thermovision Test.ppt
Exception Example #1 Breaker Connections Hot Spot Temperature...203F Reference Temperature.156F Temperature Difference.47F Repair Priority 3 Corrective Measures Required As Soon As Possible 119.7属F 179.5属F 120 140 160 AR01 SP01
Exception Example #2 Fuse Block 87.8属F 232.4属F 100 150 200 AR01 SP01 Hot Spot Temperature...303F Reference Temperature.170F Temperature Difference.133F Repair Priority 4 Corrective Measures Required Immediately
Exception Example #3 Breaker Connections Hot Spot Temperature...459F Reference Temperature..101F Temperature Difference.358F Repair Priority 4 Corrective Measures Required Immediately 93.0属F 144.6属F 100 110 120 130 140 AR01 SP01
Exception Example #4 Main Switchboard Fused Switch Hot Spot Temperature...311F Reference Temperature..151F Temperature Difference...160F Repair Priority 4 Corrective Measures Required Immediately 118.9属F 245.4属F 120 140 160 180 200 220 240 AR01 SP01
Exception Example #5 Breaker Load Hot Spot Temperature.71F Reference Temperature55F Temperature Difference..16F Repair Priority 0 No Corrective Measures Required At This Time 92.6属F 119.1属F 95 100 105 110 115 Breaker Load A-105 amps B-150 amps C-167 amps
Exception Example #6 Building Service Drop Hot Spot Temperature...301F Reference Temperature77F Temperature Difference..224F Ambient Temp.45 F Repair Priority 4 Corrective Measures Required Immediately
Exception Example #7 Arrestor Pad Mount Transformer Hot Spot Temperature.92F Reference Temperature...58F Temperature Difference..32F Ambient Temperature.45F Repair Priority 3 Corrective Measures Required As Soon As Possible
Exception Example #9 Pad Mount Transformer High Side Hot Spot Temperature.159F Reference Temperature98F Temperature Difference..61F Ambient Temperature.71F Repair Priority 3 Corrective Measures Required As Soon As Possible 71.9属F 124.2属F 80 90 100 110 120
Exception Example #10 Motor Drive End Bearing Hot Hot Spot Temperature.127F Reference Temperature99F Temperature Difference..28F Ambient Temperature.74F Repair Priority ? Mechanical System
Thermal Picture Pad-Mount Cooling Fins In this case the exception is cold 84.1属F 120.7属F 90 100 110 120
Thermal Picture 480 Volt Capacitor Bank 6 1 8 1 1 1 Again the exception is cool
Infrared Tips Use a Certified Thermographer Proper Training is vital to understand thermography Cost Effective - Quality Camera is $20,000 to $50,000 Scan should cost from $800 to $1500 per day Inspect When System Load Is High Useless To Scan Under Light or No Load Keep in mind that an infrared electrical inspection is only a report of the electrical system at the time of the inspection. Equipment that was off or unloaded because of cycling or scheduling may have problems that were not evident at the time of the inspection. Do Inspections On A Periodic Basis --Annually Good - Semi-Annually Better (at least first couple of times) Insures that over period of time all equipment is inspected
Benefit of Electrical Infrared Inspections "...From a return on investment perspective, infrared inspection programs have proven that on average for every $1 spent on infrared electrical inspections, there is a $4 return on investment for materials and labor from fixing the problems before it fails..." "Cost/Benefits Analysis of Infrared Programs." Maintenance Technology Magazine June 2001 = $1.00 $4.00

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Thermovision Test.ppt

  • 1. INFRARED THERMOGRAPHY ELECTRICAL INSPECTIONS . Thermographer Level II Recent technical manuals published by National Fire Protection Association (NFPA) and the Inter-National Electrical Testing Association (NETA) prominently recommend the use of infrared inspection in the testing and maintenance of electrical systems
  • 4. Infrared Radiation . Wavelength is longer than visible light. Infrared waves are not visible by the eye
  • 5. Infrared Thermography An Infrared Camera Senses Infrared Radiation A Processor In The Camera Assigns Color To The Infrared Radiation-Different Color Equals Different Temperature Enabling Us To Visualize The Thermal World
  • 8. Infrared Image Color Palette Range Is Chosen For Clarity Color Palette 2 White = T>95F Black = T<72F Color Palette 1 White = T>85F Black = T<72F 1 2 Palette 2 Is Better Suited For This Image
  • 9. Some Uses Of Infrared Thermography Electrical Inspections Hot Connections Failing Components Overloaded Circuits Mechanical Inspections Motors, Bearings, Drives, Steam Systems, Boilers Fire Hot Spots People Rescue Building Thermal Envelope Roof Leaks Military Medical Severe Acute Respiratory Syndrome (SARS) Manufacturing Processes Plastics Carpet Heat/Chilling Processes Mill Operations Slag Detection Police Work Fugitive Search Drug Enforcement Missing Persons Search Animal Equine Hot Joints Ligaments
  • 10. Benefits of Periodic Electrical Infrared Inspections Predictive Maintenance...Allows Scheduling Of Repairs, Forward Buying Reduces Downtime Find It, Repair It, Before It Blows Up and Stops Production
  • 12. Qualitative Infrared Electrical Inspection Exceptions: are abnormally warm components that may be a potential problem. Exceptions are usually identified by comparing the thermal patterns of like components. Qualitative Inspection: The practice of gathering information about an electrical system by observing infrared radiation, recording findings, analyzing findings, and presenting that information.
  • 13. Electrical Inspection Items Transformer Pad Mount Dry Overhead Service Entrance Main Switchgear Motor Control Centers Disconnects Bus Duct Distribution Panels Control Panels Rectifiers Drives Capacitor Banks Any Electrical Connection
  • 14. Exception Analysis Below is an exception. One of the conductor terminals is hot. Hot Terminal Temperature..203F Left Terminal Temperature.156F Temperature difference is 47F 119.7属F 179.5属F 120 140 160 AR01 SP01 When should you repair this exception?
  • 15. Exception Repair Priority Criteria Priority 0 Temperature Difference 10F or Less No Corrective Measures Required At This Time. Priority 4 Temperature Difference Over 100F Corrective Measures Required Immediately Priority 3 Temperature Difference 30F to 100F Corrective Measures Required As Soon As Possible Priority 2 Temperature Difference 20F to 30F Corrective Measures Required As Scheduling Permits Priority 1 Temperature Difference 10F to 20F Corrective Measures Required At Next Maintenance Period
  • 21. Exception Example #1 Breaker Connections Hot Spot Temperature...203F Reference Temperature.156F Temperature Difference.47F Repair Priority 3 Corrective Measures Required As Soon As Possible 119.7属F 179.5属F 120 140 160 AR01 SP01
  • 22. Exception Example #2 Fuse Block 87.8属F 232.4属F 100 150 200 AR01 SP01 Hot Spot Temperature...303F Reference Temperature.170F Temperature Difference.133F Repair Priority 4 Corrective Measures Required Immediately
  • 23. Exception Example #3 Breaker Connections Hot Spot Temperature...459F Reference Temperature..101F Temperature Difference.358F Repair Priority 4 Corrective Measures Required Immediately 93.0属F 144.6属F 100 110 120 130 140 AR01 SP01
  • 24. Exception Example #4 Main Switchboard Fused Switch Hot Spot Temperature...311F Reference Temperature..151F Temperature Difference...160F Repair Priority 4 Corrective Measures Required Immediately 118.9属F 245.4属F 120 140 160 180 200 220 240 AR01 SP01
  • 25. Exception Example #5 Breaker Load Hot Spot Temperature.71F Reference Temperature55F Temperature Difference..16F Repair Priority 0 No Corrective Measures Required At This Time 92.6属F 119.1属F 95 100 105 110 115 Breaker Load A-105 amps B-150 amps C-167 amps
  • 26. Exception Example #6 Building Service Drop Hot Spot Temperature...301F Reference Temperature77F Temperature Difference..224F Ambient Temp.45 F Repair Priority 4 Corrective Measures Required Immediately
  • 27. Exception Example #7 Arrestor Pad Mount Transformer Hot Spot Temperature.92F Reference Temperature...58F Temperature Difference..32F Ambient Temperature.45F Repair Priority 3 Corrective Measures Required As Soon As Possible
  • 28. Exception Example #9 Pad Mount Transformer High Side Hot Spot Temperature.159F Reference Temperature98F Temperature Difference..61F Ambient Temperature.71F Repair Priority 3 Corrective Measures Required As Soon As Possible 71.9属F 124.2属F 80 90 100 110 120
  • 29. Exception Example #10 Motor Drive End Bearing Hot Hot Spot Temperature.127F Reference Temperature99F Temperature Difference..28F Ambient Temperature.74F Repair Priority ? Mechanical System
  • 30. Thermal Picture Pad-Mount Cooling Fins In this case the exception is cold 84.1属F 120.7属F 90 100 110 120
  • 31. Thermal Picture 480 Volt Capacitor Bank 6 1 8 1 1 1 Again the exception is cool
  • 32. Infrared Tips Use a Certified Thermographer Proper Training is vital to understand thermography Cost Effective - Quality Camera is $20,000 to $50,000 Scan should cost from $800 to $1500 per day Inspect When System Load Is High Useless To Scan Under Light or No Load Keep in mind that an infrared electrical inspection is only a report of the electrical system at the time of the inspection. Equipment that was off or unloaded because of cycling or scheduling may have problems that were not evident at the time of the inspection. Do Inspections On A Periodic Basis --Annually Good - Semi-Annually Better (at least first couple of times) Insures that over period of time all equipment is inspected
  • 33. Benefit of Electrical Infrared Inspections "...From a return on investment perspective, infrared inspection programs have proven that on average for every $1 spent on infrared electrical inspections, there is a $4 return on investment for materials and labor from fixing the problems before it fails..." "Cost/Benefits Analysis of Infrared Programs." Maintenance Technology Magazine June 2001 = $1.00 $4.00