Title: Interpretation of alternative environment-friendly gaseous insulator for SF₆

Authors: Hafiz Shafqat Kharal; Muhammad Kamran; Rahmat Ullah; Sohail Aftab Qureshi

Addresses: High Voltage Laboratory, Department of Electrical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan ' High Voltage Laboratory, Department of Electrical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan ' Faculty of Electrical Engineering, GIK Institute of Engineering Sciences and Technology, Topi 23640, Pakistan ' High Voltage Laboratory, Department of Electrical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan

Abstract: This work presents the testing of a unique composite gaseous insulating material using comparative evaluations with the properties of existing insulating materials. Main objectives of this research include the investigation of a novel composite insulating material with superior insulating properties, reduced cost, and less environmental hazard. Sulphur hexafluoride (SF₆) is commonly used in current electrical insulation network but having recognised disadvantage of global warming potential (GWP) 23,800 times larger than CO₂. Due to this, it is an urgent need to find alternative of SF₆ which is environment friendly. R₁₂ and its mixture with different concentration of carbon dioxide with varying pressure are tested. Gaseous mixtures containing R₁₂ gas demonstrate good dielectric properties with low-temperature usage possibilities. The insulation properties of SF₆ and R₁₂/CO₂ gas mixtures with other merits and experimental set up are comprehensively discussed in this paper. The experimental study of power frequency breakdown voltage is also analysed for a proposed gaseous mixture of R₁₂/CO₂.

Keywords: R₁₂/CO₂ mixtures; insulating material; dielectric properties; environment-friendly.

DOI: 10.1504/IJGW.2020.108669

International Journal of Global Warming, 2020 Vol.21 No.3, pp.244 - 259

Received: 08 Apr 2019
Accepted: 21 Dec 2019
Published online: 24 Jul 2020 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article