| 1. | Ranachowski P., Rejmund F., Ranachowski Z., Jaroszewski M.♦, Pospieszna J.♦, Wieczorek K.♦, Acoustic investigations of long-rod insulators and their material properties, IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, ISSN: 1070-9878, Vol.17, No.1, pp.81-88, 2010 Abstract:The paper presents a nondestructive ultrasonic method of investigating long-rod insulators used on overhead power lines and in substations. A correlation between the degree of degradation of porcelain C 120 and the ultrasonic wave propagation and attenuation parameters was established. The ultrasonic method was used to analyze the quality of groups of line and post insulators after many years of service. Also a new mechanoacoustic method of investigating the stages in the degradation of insulator porcelain was applied. As a result of the investigations carried out on samples of porcelain C 130 the successive stages in the degradation of ceramic insulators during their service life were determined. Keywords:Ceramic insulators, insulator testing, acoustic measurements, ultrasonic applications, acoustic emission Affiliations:| Ranachowski P. | - | IPPT PAN | | Rejmund F. | - | IPPT PAN | | Ranachowski Z. | - | IPPT PAN | | Jaroszewski M. | - | Wroclaw University of Science and Technology (PL) | | Pospieszna J. | - | Wroclaw University of Science and Technology (PL) | | Wieczorek K. | - | Wroclaw University of Science and Technology (PL) |
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