Share Email Print

Proceedings Paper

Load and torque: what is the infrared connection?
Author(s): Garry B. Desroches
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

To see the spark of a short circuit in an electrical component is a human ability. To detect the hot spot in a faulty electrical connection long before the component reaches a failure state is an ability which infrared thermography is noted for throughout the inspection community. Over the years, the inspection industry has developed various guidelines for different fault categories as it relates to measured surface temperatures. These temperature categories indicate the electrical connection's severity and in turn equate to a repair schedule. Typically during an electrical thermographic inspection the component's phase loading should be obtained by an electrician. However, quite often this is not achievable. In the absence of phase loading measurements, the thermographer must diagnose thermal patterns to accurately identify the fault type, i.e. loose, overload, etc.. More times than not, this predictive maintenance tool detects loose connections. Unfortunately, the phase connection's torque value is not obtainable during an infrared inspection to see how loose or tight the connection really is. Therefore, to measure the phase loading is only one aspect. Knowing the connections' torque value is another. This paper is intended to reveal the infrared relationship between variable phase loading, variable lug torque and the associated surface temperatures.

Paper Details

Date Published: 15 March 2002
PDF: 10 pages
Proc. SPIE 4710, Thermosense XXIV, (15 March 2002); doi: 10.1117/12.459585
Show Author Affiliations
Garry B. Desroches, Public Works and Government Services Canada (Canada)

Published in SPIE Proceedings Vol. 4710:
Thermosense XXIV
Xavier P. Maldague; Andres E. Rozlosnik, Editor(s)

© SPIE. Terms of Use
Back to Top