Fluorinated Nitrile as a Potential Substitute of SF₆ for ARC Interruption in Switchgears

this paper is based on the replacement of Sulfur hexafluoride (SF₆) gas in switchgears, by using C₄F₇N; a fluorinated nitrile. The principle research is however required to examine the potential of fluorinated Nitrile as compared to the SF₆. Until now, lesser number of attempts being made to investigate the arc interruption time by usingC₄F₇N. The objective of this work was to investigate the arcing time ofC₄F₇ N with different mixture compositions and compare the results with SF₆. C₄F₇N due to limitations liquefaction temperature, cannot be use alone, so this paper will show the mixture of (C₄F₇N) withCO₂ as the main subject. By mixing a small amount ofC₄F₇N intoCO₂, the breaking performance of the insulating gas can be significantly improved. Under the conditions, that the partial pressure ofC₄F₇N suitable replacement of SF6, C₄F₇N is certain, increasing the total pressure of the mixed gas ofC₄F₇N/CO₂ can also improve its breaking performance.