Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 31821
Ageing Deterioration of Silicone Rubber Polymer Insulator under Salt Water Dip Wheel Test

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


This paper presents the experimental results of silicone rubber polymer insulators for 22 kV systems under salt water dip wheel test based on IEC 62217. Straight shed silicone rubber polymer insulators having leakage distance 685 mm were tested continuously 30,000 cycles. One test cycle includes 4 positions, energized, de-energized, salt water dip and deenergized, respectively. For one test cycle, each test specimen remains stationary for about 40 second in each position and takes 8 second for rotate to next position. By visual observation, sever surface erosion was observed on the trunk near the energized end of tested specimen. Puncture was observed on the upper shed near the energized end. In addition, decreasing in hydrophobicity and increasing in hardness were measured on tested specimen comparing with new specimen. Furthermore, chemical analysis by ATR-FTIR was conducted in order to elucidate the chemical change of tested specimens comparing with new specimen.

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

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2456


[1] R. Hackam, "Outdoor HV Composite Polymeric Insulators", IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 6, pp. 262-269, 1999.
[2] Y. Z. Khan, A. A. Al-Arainy, N. H. Malik and M. I. Qureshi, "Effect of Thermo-Electrical Stresses and Ultra-Violet Radiation on Polymeric Insulators", Final Research Report No. EE-18/26/27, King Saud University, Saudi Arabia, 2006.
[3] Y. Ono, "Silicone- Fields of Application and Technological Trends", Shin-Etsu Chemical Co. Ltd., Japan, 2003.
[4] B. Marungsri, "Fundamental Investigation on Salt Fog Ageing Test of Silicone Rubber Housing Materials for Outdoor Polymer Insulators," Doctoral Thesis, Chubu University, 2006.
[5] A. Muncivi, P. Sarkar and A. Haddae, "Tracking Wheel Test Facilities," in Conference Record of IEEE International Conference on Communications, pp. 1-5, 2009.
[6] G. Xu, P. B. Mcgrath and C. W. Burns, "Accelerated Environmental and Electrical Aging of Polymer Insulators," IEEE Conference on Electrical Insulation and Dielectric Phenomena, San Francisco, pp. 404-407, 1996.
[7] C. Hillborg, "Loss and Recovery of Hydrophobicity of Polydimethylsiloxane after Exposure to Electrical Discharges," Doctoral Thesis, Department of Polymer Technology, Royal Institute of Technology, 2001.
[8] Y. Yu, L. Xidong, Z. Yuanxiang and L. Xuesong "Study of Tracking Wheel Test Method uncer DC Voltage," International Conference on Properties and Applications of Dielectric Materials, Vol. 1, No. 1, pp. 439-442, 2003.
[9] IEC 62217 Ed. 1.0, Committed Draft, Sep, 2002.
[10] I. J. S. Lopes, S. H. Jayaram and E. A. Cherney, "A Method for Dtecting 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.
[11] N. Yoshimura and S. Kumakai," Electrical Environmental Aging of Silicone Rubber Used in Outdoor Insulation," IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 6, pp. 632-650, 1999.
[12] 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.
[13] J. Burnham, "Guideline for Visual Identification of Damage Polymer Insulators" France, 1998.
[14] IEC 60507 Ed. 2 b: 1991, "Artificial pollution tests on high-voltage insulators to be used on AC systems".
[15] STRI Guide, "Hydrophobicity Classification Guide", 92/1, 1992.
[16] ISO 868, "Plastics and ebonite - Determination of indentation hardness by means of a durometer (Shore hardness)".