Informatics Publishing Limited

Dharmesh Y. ¹, Vasudev N. ¹, Karunakara K. ¹, Sheshagiri Rao U. R. ¹, Shivakumara Aradhya R. S. ¹, Anoop Kumar Gupta ², Mukesh Wadhwa ²

Affiliations
1 High Voltage Division, Central Power Research Institute, Bangalore - 560 080, IN
2 DMRCL, Metro Bhavan, 6th Floor, Fire Brigade Lane, Barakhamba Road, New Delhi - 110 001, IN

Abstract

This paper describes the failure analysis of a section insulator assembly at one of the depot of Delhi Metro Rail Corporation Limited (DMRCL). Frequent breaker tripping at Saritavihar depot of DMRCL due to flashover of the section insulator assembly was observed; the cause of failure of the section insulator was investigated and presented in this paper. As a first step laboratory tests on new and used section insulator assemblies were conducted to make comparative analysis, and then simulation studies were carried out to estimate the possible over voltages during different switching operations and their relationship with the test voltages used in the experimental investigation. This paper presents the laboratory experiments and simulation studies for the failure analysis of section insulator assembly of DMRCL.

Keywords

Section Insulator, Electric Traction, Insulation Level and Impulse Testing

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