Characteristics investigation of R407C in high voltage applications as an alternative to SF6

Khattak, Imad M., Khan, Faisal, Ali, Syed Zulfiqar, Ullah, Rahmat, Ullah, Irshad, Khan, Muhammad Adeel, Rehman, Khalid and Awan, Aftab Zaman 2025. Characteristics investigation of R407C in high voltage applications as an alternative to SF6. Results in engineering 27 , 106627. 10.1016/j.rineng.2025.106627

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Abstract

The concept of life without electrical power is not possible. All the industrial, domestic zones etc., requires power to operate, which is transmitted by means of overhead high voltage transmission lines from generating stations to sub-stations. In recent, the equipment for handling HV (high voltage) in GIS (gas-insulated switchgear) and GIL(gas-insulated transmission lines) use SF6 gas with a good dielectric strength, as a medium for equipment isolation and arc cooling/quenching purposes. But SF6 possess high value of Global warming potential (22,800) and high atmospheric life, in short it’s a greenhouse gas which has a direct impact on the environment. However, due to its usage in power industries like china where 70 % emission of SF6 occurs from industries, therefore, regarding the mentioned drawbacks, R407C with different pressure and mixture ratio of buffer gases like air and CO2 is analyzed experimentally under high voltage AC and DC breakdown in order to replace SF6 gas due to less environmental impacts. The Paschen’s curve, self-recoverability is given, insulation characteristics and synergistic effect is also calculated in this research work. There is 93.28 % GWP decrease in R407C and atmospheric lifetime is 99.51 % less as compared SF6.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Engineering ?? AHVER ??
Publisher:	Elsevier
ISSN:	2590-1230
Date of First Compliant Deposit:	26 August 2025
Date of Acceptance:	4 August 2025
Last Modified:	26 Aug 2025 11:15
URI:	https://orca.cardiff.ac.uk/id/eprint/180644

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