- Author
- Andersson, P. | Persson, B.
- Title
- Performance of Cables Subjected to Elevated Temperatures.
- Coporate
- SP Swedish National Testing and Research Institute, Boras, Sweden
- Report
- SP Report 2001:36, 2001, 47 p.
- Distribution
- FOR MORE INFORMATION CONTACT: SP Swedish National Testing and Research Institute, Box 857, SE-501 15 BORAS, Sweden. Telephone: +46 33 16 50 00, Fax: +46 33 13 55 02, Email: info@sp.se Website: http://www.sp.se/eng/default.htm
- Keywords
- cables | temperature | damage | heat transfer | risk analysis | smoke layers
- Abstract
- The time to damage, i.e. time to short circuit, and the corresponding temperature within the cable were recorded for two different data cables and one low voltage cable when subjecting the cables to an elevated surrounding temperature. The cables used were of the same type as in a previously reported project where the performance of cables exposed to thermal radiation was investigated. In the experiments it was found that short-circuiting occurred at a certain temperature in the core of the cable. The heating of the cables were modelled with the aid of computer programs for thermal analysis, with an empirical solution, and an analytical solution of heat conduction. The experimental results were used to evaluate the different models. The empirical model was not very successful, but the analytical solution turned out to be promising. However, both the analytical solution and the use of computer programs such as TASEF requires data of the thermal properties of the cables. This is a complication as such data are not easily accessible. To some extent the thermal properties of the cables can be estimated from the experimental results