Title :
Investigation on tracking deterioration using electron spin resonance
Author :
Kamosawa, T. ; Inui, Y. ; Mizuta, Y. ; Yoshimura, N. ; Nishida, M. ; Noto, F.
Author_Institution :
Fukushima Nat. Coll. of Technol., Japan
Abstract :
A tracking deterioration test using polycarbonate (PC) as a sample was carried out by means of the modified IEC 587 test method. The structure of residual carbon was investigated with the measurement of electron spin resonance. It was shown that carbon radicals increase noticeably in accordance with the applied voltage and applied time. It is found that carbon radicals are generated in proportion to the product of the square of the applied voltage and the applied time. Analysis of the X-ray diffraction pattern indicates that carbon radicals do not form a graphite structure
Keywords :
insulation testing; organic insulating materials; paramagnetic resonance of free radicals; polymers; surface discharges; X-ray diffraction pattern; applied time dependence; applied voltage dependence; electron spin resonance; modified IEC 587 test method; organic insulation; polycarbonate; tracking deterioration test; Electrodes; IEC standards; Insulation life; Magnetic field measurement; Manganese; Organic materials; Paramagnetic resonance; Pollution measurement; Testing; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172058
