Environmental Analysis on Insulation Resistance Reduction Case

Abstract:

An insulation resistance reduction case was studied in this paper. An electrical component composed with metal panel, screw and insulation panel occurred flashover after 2-year service. Environment assessment, dust analysis and material analysis were done to find the reduction reason. The result shows that the reduction is caused by conductive dust aggraded on insulation panel surface; the aged surface of insulation material is favor for the conductive dust aggradation; humid air and high-hygroscopic dust accelerate this aggradation. It is suggested to improve the hydrophobicity and anti-aging property of insulation materials as well as increase the creepage for avoiding the kind of failure.

• Periodical: Applied Mechanics and Materials (Volume 483)
• Pages: 257-261
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.483.257
• Online since: December 2013
• Authors: Li Qiao*, Jian Feng Sheng
• Keywords: Dust Analysis, Environment Assessment

References

[1] GB/T 18204. 13-2003 Methods for determination of air temperature in public places.

[2] GB/T 18204. 14-2000 Methods for determination of air humidity in public places.

[3] GBZ/T 160. 37-2004 Methods for determination of chlorides in the air of workplace.

[4] GBZ/T 192. 1-2007 Determination of dust in the air of workplace-Part 1: Total dust concentration.

[5] GB/T 16427-1996 Determination for electrical resistivity of dust in layer.