An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System
While converting the existing rail network to electric traction, provision of specified minimum requirement of air gap clearance under old bridges and tunnels has always posed problems. Demand in specified electrical clearance of air-gap often forced the Indian Railways in construction of new bridge...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2020-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9109295/ |
| _version_ | 1818736497366401024 |
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| author | Ravindra Arora Bharat Singh Rajpurohit |
| author_facet | Ravindra Arora Bharat Singh Rajpurohit |
| author_sort | Ravindra Arora |
| collection | DOAJ |
| description | While converting the existing rail network to electric traction, provision of specified minimum requirement of air gap clearance under old bridges and tunnels has always posed problems. Demand in specified electrical clearance of air-gap often forced the Indian Railways in construction of new bridges for the traction overhead lines to pass when the existing bridges still had their life left, which resulted in very high cost of electrification schemes. Extensive experimental investigation work is presented in this article for the performance of air-gap on actual catenary of contact wire assembly. Measurements were made under natural conditions of rain, fog, fair weather and under artificial rain with ac power frequency, lightning and switching impulse voltages. Investigations were also performed with the insertion of a solid insulating barrier in the gap. Considering the severest condition that of stream of water falling directly on the live conductor from the grounded object, the requirement for minimum air-gap clearance could be recommended to reduce to 170 mm for short time and 220 mm for long time applications, which is 37% lower than the air-gap clearance practiced hitherto. Development of twin contact wire assembly forming horizontal bundle is recommended for reducing the air-gap clearance further. |
| first_indexed | 2024-12-18T00:38:05Z |
| format | Article |
| id | doaj.art-0d8a79c35db24e37883777613249ff6a |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-18T00:38:05Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-0d8a79c35db24e37883777613249ff6a2022-12-21T21:26:57ZengIEEEIEEE Access2169-35362020-01-01810576610577410.1109/ACCESS.2020.30003439109295An Experimental Investigation of Electrical Clearance in Air for Overhead Traction SystemRavindra Arora0Bharat Singh Rajpurohit1https://orcid.org/0000-0001-9843-6002School of Computing and Electrical Engineering, IIT Mandi, Mandi, IndiaSchool of Computing and Electrical Engineering, IIT Mandi, Mandi, IndiaWhile converting the existing rail network to electric traction, provision of specified minimum requirement of air gap clearance under old bridges and tunnels has always posed problems. Demand in specified electrical clearance of air-gap often forced the Indian Railways in construction of new bridges for the traction overhead lines to pass when the existing bridges still had their life left, which resulted in very high cost of electrification schemes. Extensive experimental investigation work is presented in this article for the performance of air-gap on actual catenary of contact wire assembly. Measurements were made under natural conditions of rain, fog, fair weather and under artificial rain with ac power frequency, lightning and switching impulse voltages. Investigations were also performed with the insertion of a solid insulating barrier in the gap. Considering the severest condition that of stream of water falling directly on the live conductor from the grounded object, the requirement for minimum air-gap clearance could be recommended to reduce to 170 mm for short time and 220 mm for long time applications, which is 37% lower than the air-gap clearance practiced hitherto. Development of twin contact wire assembly forming horizontal bundle is recommended for reducing the air-gap clearance further.https://ieeexplore.ieee.org/document/9109295/Air-gapsbundle conductorsdielectric breakdownelectric fieldstraction |
| spellingShingle | Ravindra Arora Bharat Singh Rajpurohit An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System IEEE Access Air-gaps bundle conductors dielectric breakdown electric fields traction |
| title | An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System |
| title_full | An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System |
| title_fullStr | An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System |
| title_full_unstemmed | An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System |
| title_short | An Experimental Investigation of Electrical Clearance in Air for Overhead Traction System |
| title_sort | experimental investigation of electrical clearance in air for overhead traction system |
| topic | Air-gaps bundle conductors dielectric breakdown electric fields traction |
| url | https://ieeexplore.ieee.org/document/9109295/ |
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