Electrical Sub-station Infrared Surveying By Professional Thermographer


Electric	EM Survey	Case Study

Case Study Examples

Sprint Telephone electrical sub-station, Dayton. Ohio

We brought MIS in to evaluate the condition of the roofs at several sub-stations in the Dayton, Ohio area.

While surveying a particular roof area the thermographer, (Richard Mansfield) notice the power line going into the sub-station was extremely hot, leading all the way up into the transformer mounted on a utility pole.

The transformer Peitro oil was so hot that it was evaporating inside the transformer, which creates a flammable gas. When transformers explode it is because this gas is supper charged so hot that it explodes the body of the transformer, causing power outage. We would have lost some 125,000 customers had it not been for the thermographer’s awareness of this problem.

The next day we were able to switch to a generator and fix the problem without any downtime.

Thank you, MIS for your excellent service.

Ron Reagan
Electrical Engineer, Sprint Telephone Co.


Roller #56 complete

Date: 7-5-1999 Time: 2025 Client: ABC Industries Location: East Bay Area, Building - 3		Infrared Imager: Agema 470 Last Calibration Date: 1-5-2003 Thermographer: Richard J. Mansfield CIT # 4184 Infraspection Institute-1990

Roller # 56 - East Bay Area



Maximum rated load: N/A Measured load: N/A Distance from imager to object: 3' Filters or special optics used: None		Fault Temperature: 185C Normal Operating Temperature: 110C Delta T : 75C Acceptable Delta T : 25 Degrees

Priority Level - 4 Component failure imminent. Stop survey. Inform cognizant personnel

Description: Roller Bearings overheated, causing extreme friction on roller shaft.

Recommendation: Perform maintenance or replace during normally scheduled shut down.

Maintenance Action Record (Update Quarterly)

	Replaced	Repaired	Secured	Cleaned
Date:
Date:
Date:
Date:


EQ 1019 Henry Filters #1

Date: 5/3/2002 Time 2:15pm Client: Machining Enterprises Location: Saginaw, Mi.		Infrared Imager: Agema 470 Last Calibration Date:1-5-2002 Thermographer: Richard J. Mansfield CIT # 4184 Infraspection Institute-1990

EQ Henry filters #1



Maximum Rated Load: N/A Measured Load: N/A Distance from imager to object: 4' Filters or special optics used: None		Unit Temperature: 91.8 F Temperature of adjacent unit: 71.9 F Delta T Temperature: 19.9

Description: Unit may be slightly overheated.

Recommendation: Further inspection by trained personnel advised.

Maintenance Action Record (Update Quarterly)

	Replaced	Repaired	Secured	Cleaned
Date:
Date:
Date:
Date:


Head Audit # 2

Date: 5/15/2002 Time 1:50pm Client: Machining Enterprises Location: Saginaw, Mi.		Infrared Imager: Agema 470 Last Calibration Date:1-5-2002 Thermographer: Richard J. Mansfield CIT # 4184 Infraspection Institute-1990

Head Audit # 2



Maximum Rated Load: N/A Measured Load: N/A Distance from imager to object: 4' Filters or special optics used: None		Unit Temperature: 96.5 F Temperature of adjacent unit: 77.1 F Delta T Temperature: 19.4

Description: Unit may be slightly overheated.

Recommendation: Further inspection by trained personnel advised.

Maintenance Action Record (Update Quarterly)

	Replaced	Repaired	Secured	Cleaned
Date:
Date:
Date:
Date: