Comparison of Ageing Deterioration of Silicone Rubber Outdoor Polymer Insulator under Salt Water Dip Wheel Test

Authors: J. Grasaesom, S. Thong-om, W. Payakcho, A. Oonsivilai, B. Marungsri

Abstract:

This paper presents the experimental results on ageing deterioration of silicone rubber outdoor polymer insulator under salt water dip wheel test based on IEC 62217. In order to comparison effect of chemical contents, silicone rubber outdoor polymer insulators having same configuration and leakage distant from two manufactures were tested together continuously 30,000 test cycles. Many discharge activities were observed in during the test. After 30,000 test cycles, in spite of same configuration, differences in degree of surface aging were observed. Physical analysis such as decreasing in hydrophobicity and increasing in hardness measurement were measured on two-type tested specimen surface in order to confirm degree of surface ageing. Furthermore, chemical analysis by ATR-FTIR to diagnose the chemical change of tested specimen surface was conducted to confirm the physical analysis results.

Keywords: ageing of silicone rubber, salt water dip wheel test, silicone rubber polymer insulator

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1079080

References:

[1] M. G. Danikas, "Polymer Outdoor Insulators", Department of Electrical and Computer Engineering, Democritus University of Thrace, Vol. 40, No. 1, pp. 3-10, 1999.
[2] J. Grasaesom, S. Thong-om, W. Payakcho and B. Marungsri, " Ageing Deterioration of Silicone Rubber Polymer Insulator under Salt Water Dip Wheel Test", World Academy of Science, Engineering and Technology, Issue 80, August 2011, pp. 211-217.
[3] S. Thong-om, W. Payakcho, J. Grasaesom and B. Marungsri, " Study of Ageing Deterioration of Silicone Rubber Housing Material for Outdoor Polymer Insulators", World Academy of Science, Engineering and Technology, Issue 80, August 2011, pp. 533-539.
[4] S. Kumagai, B. Marungsri, H. Shinokubo, R. Matsuoka and N. Yoshimura, "Comparison of Leakage Current and Aging of Silicone Rubbers and Porcelain in both Field and Salt-fog Tests", IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 13, pp. 1286- 1302, 2006.
[5] W. Payakcho, J. Grasaesom, S. Thong-om and B. Marungsri, " Artificial Accelerated Ageing Test of Silicone Rubber Housing Material for Lightning Arrester", World Academy of Science, Engineering and Technology, Issue 80, August 2011, pp. 650-655.
[6] Y. Yu, L. Xidong, Z. Yuanxiang and L. Xuesong, "Study of Tracking Wheel Test Method under DC Voltage", International Conference on Properties and Applications of Dielectric Materials, Vol. 1, No. 1, pp. 439-442, 2003.
[7] A. Muncivi, P. Sarkar and A. Haddae, "Tracking Wheel Test Facilities", in Conference Record of IEEE International Conference on Communications, pp. 1-5, 2009.
[8] IEC 62217 Ed. 1.0, Committed Draft, Sep, 2002.
[9] M. Amin and M. salman, "Aging of Polymer Insulators (An Overview)", Department of Electrical Engineering, University of Engineering and Technology, 2006.
[10] N. Yoshimura and S. Kumagai, "Electrical Environmental Aging of Silicone Rubber Used in Outdoor Insulation", IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 6, pp. 632-650, 1999.
[11] B. Marungsri, H. Shinokubo and R. Matsuoka, "Effect of Specimen Configuration on Deterioration of Silicone Rubber for Polymer Insulators in Salt Fog Ageing Test", IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 13, pp. 129-138, 2006.
[12] I. J. S. Lopes, S. H Jayaram and E. A. Cherney, "A Method for Detecting the Transition from Corona from Water Droplets to Dry-Band Arcing on Silicone Rubber Insulators", IEEE Trans .on DEI., Vol. 6, pp. 964-971, 2002.
[13] J. Burnham, "Guideline for Visual Identification of Damage Polymer Insulators" France, 1998.
[14] M. A. Salam, N. Mohammad, Z. Nadir and A. A. Maqrashi, "Measurement of Conductivity and Equivalent Salt Deposit Density of Contaminated Glass Plate", TENCON 2004, 2004 IEEE Region 10 Conference, Vol. 3, pp.268-270, 2004.
[15] IEC 60507 Ed. 2 b: 1991, "Artificial pollution tests on high-voltage insulators to be used on AC systems".
[16] H. Gao, Z. Jia, Y. Moa, Z. Guan and L. Wang, "Effect of Hydrophobicity on Electric Field Distribution and Discharges along Various Wetted Hydrophobic Surfaces", IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 15, pp. 435-443, 2008.
[17] STRI Guide, "Hydrophobicity Classification Guide", 92/1, 1992.
[18] ISO 868, "Plastics and ebonite - Determination of indentation hardness by means of a durometer (Shore hardness)".