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: 13 Jul 2020 *

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