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INFRARED TRAINING CENTER
Volume 1, Issue 2 March, 2000
WHEN YOU’RE WARM, YOU’RE HOT! By Robert Rogers, itc Level II, itc Infrared Course Instructor
T
here are a number of factors and considerations to determine what temperatures measured on electrical circuits constitute a problem. The initial design of electrical equipment is the foundation, good or bad, that determines the types of thermal anomalies encountered at each site. One factor is wire size. Wiring of an electrical circuit is based on the load current / demand and whether a motor is connected to the circuit which would require large start-up currents. Other considerations are the wire type, insulation type (THHN etc.), and the current load on the circuit.
ing and poorly maintained electrical equipment that is important. This is the reason why annual infrared inspection is so important to detect thermal anomalies before they become major problems. The following is a thermogram of a 1200 Amp 3Ø main circuit breaker with a measured temperature rise of 25 Cº “Traveling only 15 feet from the building to my vehicle, I heard a loud explosion and the building lost power. The breaker had exploded!” over ambient on the “B” phase. This temperature had been reported every year to management as a problem, that due to its “indirect” temperature implications, should be corrected assoon-as possible. The first year of the annual infrared scan, the temperature measured on the “B” phase was 10 Cº
Inside this issue:
Focus on Applications: New Starter Problems
2
Meet the Staff
2
About the itc
3
Contact Information
3
Upcoming Classes
3
Continuing Education for Thermographers
September 24-27 Electrical problems become worse when electrical circuits, due to increased cirOrlando cuit demands, are expanded to include additional loads. It is when these loads/ www.inframation.org circuits are added that overloaded conditions develop and are compounded every time a circuit is added. Often the total load current at the circuit breaker or fuse disconnect switch which feeds the circuit/load is never measured by the installing electrician. This condition is just as important in a residential or The last visual and thermal images of the 1200 Amp breaker ever taken! an industrial setting. It is (Continued on page 2) the increase in heat due to circuit load-
VOLUME 1, ISSUE 2
INFRARED TRAINING CENTER
PAGE 2
WHEN YOU’RE WARM, YOU’RE HOT CONT’D (Continued from page 1)
over ambient. The second year, the temperature rise was 15 Cº over ambient. Last year, the temperature rise was 25 Cº over ambient! Indirect temperatures must be taken seriously as they represent temperatures that are only a fraction of the actual temperature inside an electrical device. After stating to management that this
was a VERY SERIOUS problem, and the electrical circuit should be shut down, I finished the report far away from the electrical switchgear and left the building. Traveling only 15 feet from the building to my vehicle, I heard a loud explosion and the building lost power. The breaker had exploded! Give serious consideration to any
indirect temperature rise on electrical switchgear!!
“Indirect temperatures must be taken seriously as they represent temperatures that are only a fraction of the actual temperature inside an electrical device.”
F O C U S O N A P P L I C AT I O N S - N E W S TA RT E R P R O B L E M S By Richard Harrison, itc Level I, Cummins Engine Company
I
attended the itc IR School in Boston during the December 1999 session and subsequently received my Level I Thermographer Certification. I was very impressed with the classes. I do all the predictive maintenance including vibration analysis, infrared, & oil analysis at the Cummins Engine Company Consolidated Diesel Plant here in North Carolina. I monitor the machine line drilling, milling & grinding machinery.
a hot spot on one of the motor starters. Not only could this have caused unscheduled downtime, but also was a potential fire hazard.
“… just because you have new equipment, doesn't mean it's right.”
It was replaced and then rescanned to make sure the problem was corrected. This case not only proves the value of having an IR program, but shows how, just because you have new equipment, doesn't mean it's right.! Richard receives an “IR Thinking” T shirt for his contribution. Thank you Richard! - Editor
Note damaged terminalon old starter
Here is a case I worked on a few weeks ago. I was starting to check all electrical panels on a newly (within 2 years) installed machine line, when I discovered a potential problem. While I was scanning a machine control panel, I detected IR Images of Starter Before and After Replacement
M E E T T H E S TA F F - L I S A W E S T
M
s. West is the itc International Manager and holds a B.Sc. degree in electrical engineering and computer science. She worked for Pacific Telesis and Intel before joining FLIR Systems in 1992. Lisa spent her first 6 years as an applications engineer,
and traveled extensively in support of customers. She leads the ITC International with real world experience in technology, products and applications. She has published numerous articles and is an active member of the infrared community, both as a speaker and committee member.!
Lisa West
itc U.S.A., BOSTON
itc INTERNATIONAL, SWEDEN
About
16 Esquire Road N. Billerica, MA 01862, USA
Rinkebyvägen 19 SE-182 11 Danderyd, Sweden
Tel: +1.978.901-8405 Fax: +1.978.901-8832
Tel: +46 (0) 8 753 25 00 Fax: +46 (0) 8 753 26 01
E-mail: [email protected]
E-mail: [email protected]
The Infrared Training Center offers training and certification in all aspects of infrared thermography use. Our world-class training facilities are located near Boston, Massachusetts, USA and Stockholm, Sweden and have the world's most extensive hands on laboratories for infrared applications. Please join us in exploring the fascinating world of infrared!
Upcoming Classes USA Remember that we also teach customer site training courses at your convenience. Please contact us for more information. 550, 570, PM545, PM575, PM595, SC2000 cameras ONLY All IR cameras
Level I Pdm • March 13-17 • March 27-31 • April 10-14 • May 1-5 • May 8-12 • June 5-9 • June 12-16 Level II PdM • March 6-10 • April 3-7 • August 14-18 Level III PdM • April 17-20
Infrared
Training
Center
Your comments and suggestions about this newsletter are welcomed and encouraged. If you have an interesting application or case study to share, we encourage you to submit it for publication.
“Hands On” Thermography Training, Certification, and Support
We’re on the Web! www. infraredtraining.com
the
Please e-mail to [email protected] snail mail to the USA office itc INFRAMATION Editor: Gary Orlove
Upcoming Classes Sweden
Design: Gary Orlove
Upcoming Classes Germany
Level I CM • March 20-24 (W12) • April 10-14 (W15) • May 8-12 (W19) • May 15-19 (W20), Spanish • June 5-9, Russian (W23) • June 12-16 (W24)
Level I • January 17-21 (W 3) • February 7-11 (W 6) • March 13-17 (W10) • April 10-14 (W15) • May 22-26 (W21) • June 5-9 (W23)
Level II CM • May 29-June 2 (W22) • September 4-8 (W36)
Application Seminars • February 16-18 (W 7) • April 5-7 (W14) • May 3-5 (W18)
Level II R&D • March 6-9 (W10) • April 17-20, French (W16) • May 22-25 (W21) Advanced Operator Training • March 16-17 (W11) • April 6-7 (W14) • May 4-5 (W18)
Level II • January 27-29 (W 4) • February 3-5 (W 5) • March 20-25 (W12) • June 15-17 (W24) • June 29-July 1 (W26)
Management Certification • April 3-4 (W14) • September 18-19 (W37)
Management Certification • May 22-23 Software Training • March 21-22 • May 24-25 Regional Courses • March 7-10 (Atlanta, GA) • June 6-9 (Dallas, TX) ©2000 infrared training center - All rights reserved
or
Volume 1, Issue 2 March, 2000
WHEN YOU’RE WARM, YOU’RE HOT! By Robert Rogers, itc Level II, itc Infrared Course Instructor
T
here are a number of factors and considerations to determine what temperatures measured on electrical circuits constitute a problem. The initial design of electrical equipment is the foundation, good or bad, that determines the types of thermal anomalies encountered at each site. One factor is wire size. Wiring of an electrical circuit is based on the load current / demand and whether a motor is connected to the circuit which would require large start-up currents. Other considerations are the wire type, insulation type (THHN etc.), and the current load on the circuit.
ing and poorly maintained electrical equipment that is important. This is the reason why annual infrared inspection is so important to detect thermal anomalies before they become major problems. The following is a thermogram of a 1200 Amp 3Ø main circuit breaker with a measured temperature rise of 25 Cº “Traveling only 15 feet from the building to my vehicle, I heard a loud explosion and the building lost power. The breaker had exploded!” over ambient on the “B” phase. This temperature had been reported every year to management as a problem, that due to its “indirect” temperature implications, should be corrected assoon-as possible. The first year of the annual infrared scan, the temperature measured on the “B” phase was 10 Cº
Inside this issue:
Focus on Applications: New Starter Problems
2
Meet the Staff
2
About the itc
3
Contact Information
3
Upcoming Classes
3
Continuing Education for Thermographers
September 24-27 Electrical problems become worse when electrical circuits, due to increased cirOrlando cuit demands, are expanded to include additional loads. It is when these loads/ www.inframation.org circuits are added that overloaded conditions develop and are compounded every time a circuit is added. Often the total load current at the circuit breaker or fuse disconnect switch which feeds the circuit/load is never measured by the installing electrician. This condition is just as important in a residential or The last visual and thermal images of the 1200 Amp breaker ever taken! an industrial setting. It is (Continued on page 2) the increase in heat due to circuit load-
VOLUME 1, ISSUE 2
INFRARED TRAINING CENTER
PAGE 2
WHEN YOU’RE WARM, YOU’RE HOT CONT’D (Continued from page 1)
over ambient. The second year, the temperature rise was 15 Cº over ambient. Last year, the temperature rise was 25 Cº over ambient! Indirect temperatures must be taken seriously as they represent temperatures that are only a fraction of the actual temperature inside an electrical device. After stating to management that this
was a VERY SERIOUS problem, and the electrical circuit should be shut down, I finished the report far away from the electrical switchgear and left the building. Traveling only 15 feet from the building to my vehicle, I heard a loud explosion and the building lost power. The breaker had exploded! Give serious consideration to any
indirect temperature rise on electrical switchgear!!
“Indirect temperatures must be taken seriously as they represent temperatures that are only a fraction of the actual temperature inside an electrical device.”
F O C U S O N A P P L I C AT I O N S - N E W S TA RT E R P R O B L E M S By Richard Harrison, itc Level I, Cummins Engine Company
I
attended the itc IR School in Boston during the December 1999 session and subsequently received my Level I Thermographer Certification. I was very impressed with the classes. I do all the predictive maintenance including vibration analysis, infrared, & oil analysis at the Cummins Engine Company Consolidated Diesel Plant here in North Carolina. I monitor the machine line drilling, milling & grinding machinery.
a hot spot on one of the motor starters. Not only could this have caused unscheduled downtime, but also was a potential fire hazard.
“… just because you have new equipment, doesn't mean it's right.”
It was replaced and then rescanned to make sure the problem was corrected. This case not only proves the value of having an IR program, but shows how, just because you have new equipment, doesn't mean it's right.! Richard receives an “IR Thinking” T shirt for his contribution. Thank you Richard! - Editor
Note damaged terminalon old starter
Here is a case I worked on a few weeks ago. I was starting to check all electrical panels on a newly (within 2 years) installed machine line, when I discovered a potential problem. While I was scanning a machine control panel, I detected IR Images of Starter Before and After Replacement
M E E T T H E S TA F F - L I S A W E S T
M
s. West is the itc International Manager and holds a B.Sc. degree in electrical engineering and computer science. She worked for Pacific Telesis and Intel before joining FLIR Systems in 1992. Lisa spent her first 6 years as an applications engineer,
and traveled extensively in support of customers. She leads the ITC International with real world experience in technology, products and applications. She has published numerous articles and is an active member of the infrared community, both as a speaker and committee member.!
Lisa West
itc U.S.A., BOSTON
itc INTERNATIONAL, SWEDEN
About
16 Esquire Road N. Billerica, MA 01862, USA
Rinkebyvägen 19 SE-182 11 Danderyd, Sweden
Tel: +1.978.901-8405 Fax: +1.978.901-8832
Tel: +46 (0) 8 753 25 00 Fax: +46 (0) 8 753 26 01
E-mail: [email protected]
E-mail: [email protected]
The Infrared Training Center offers training and certification in all aspects of infrared thermography use. Our world-class training facilities are located near Boston, Massachusetts, USA and Stockholm, Sweden and have the world's most extensive hands on laboratories for infrared applications. Please join us in exploring the fascinating world of infrared!
Upcoming Classes USA Remember that we also teach customer site training courses at your convenience. Please contact us for more information. 550, 570, PM545, PM575, PM595, SC2000 cameras ONLY All IR cameras
Level I Pdm • March 13-17 • March 27-31 • April 10-14 • May 1-5 • May 8-12 • June 5-9 • June 12-16 Level II PdM • March 6-10 • April 3-7 • August 14-18 Level III PdM • April 17-20
Infrared
Training
Center
Your comments and suggestions about this newsletter are welcomed and encouraged. If you have an interesting application or case study to share, we encourage you to submit it for publication.
“Hands On” Thermography Training, Certification, and Support
We’re on the Web! www. infraredtraining.com
the
Please e-mail to [email protected] snail mail to the USA office itc INFRAMATION Editor: Gary Orlove
Upcoming Classes Sweden
Design: Gary Orlove
Upcoming Classes Germany
Level I CM • March 20-24 (W12) • April 10-14 (W15) • May 8-12 (W19) • May 15-19 (W20), Spanish • June 5-9, Russian (W23) • June 12-16 (W24)
Level I • January 17-21 (W 3) • February 7-11 (W 6) • March 13-17 (W10) • April 10-14 (W15) • May 22-26 (W21) • June 5-9 (W23)
Level II CM • May 29-June 2 (W22) • September 4-8 (W36)
Application Seminars • February 16-18 (W 7) • April 5-7 (W14) • May 3-5 (W18)
Level II R&D • March 6-9 (W10) • April 17-20, French (W16) • May 22-25 (W21) Advanced Operator Training • March 16-17 (W11) • April 6-7 (W14) • May 4-5 (W18)
Level II • January 27-29 (W 4) • February 3-5 (W 5) • March 20-25 (W12) • June 15-17 (W24) • June 29-July 1 (W26)
Management Certification • April 3-4 (W14) • September 18-19 (W37)
Management Certification • May 22-23 Software Training • March 21-22 • May 24-25 Regional Courses • March 7-10 (Atlanta, GA) • June 6-9 (Dallas, TX) ©2000 infrared training center - All rights reserved
or
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