Thermal Studies on Low Voltage Power Cable

摘要

Reliability and performance depend on characteristics wiring insulation. Lifetime cable is practically equal to that of their insulation Action of heat (due to Joule effect) lead to chemical degradation reactions, such irreversible transformations occur leading to changing properties of organic materials (especially polymers) which are formed insulation. As manufacturers and users of electrical installations must know exactly the characteristics and behavior over time, in different operating modes, the electrical cable insulation and long term functioning of their. To study the insulating properties of materials can be thermally degraded november degradation in a short time using inductive heating. Phenomenon of electromagnetic induction heating is based on the entry field in conductors, eddy currents induced electromotive voltage determined, leading to its heating by Joule-Lenz [6] This paper examines the possibility of a straight equivalence heating insulation of an electrical current to another conductor heated by induction. With the results obtained by numerical simulation are equivalent thermal effect produced by passing an electric current conductor with thermal effect due to induction. It can make a correlation with the thermal insulation on the conductors, produced by electric current (load or fault) that passes through the conductor and its insulation degrades [6]Using our numerical simulation results can equate inductive heating effect which is a small-scale test with heat insulation effect in normal or defective in different settings and operating modes [6]