CF3I Gas Mixtures: Breakdown Characteristics and Potential for Electrical Insulation

Lujia Chen, Phillip Widger, Mohammad Saufi Kamarudin, Huw Griffiths, A. Haddad
2017 IEEE Transactions on Power Delivery  
SF6 is a potent greenhouse gas, and there has been research into more environmentally friendly alternative gases with the aim of replacing the use of SF6 gas in high-voltage equipment. So far, the research into alternative gases has shown that CF3I gas mixtures have promising dielectric properties comparable to those of SF6. This paper provides an overview of research into CF3I gas and its mixtures, and gives an insight into its key properties. These include laboratory tests on the gas mixtures
more » ... on the gas mixtures and initial applications to electrical power equipment. The insulation capability makes CF3I a feasible alternative to SF6 as an insulation medium where arc quenching is not required. On the other hand, iodine deposition after electrical discharge means CF3I may not be a suitable arc quenching gas for switchgear applications that require high current interruption unless a solution is found for controlled capture of the iodine. Index Terms-Electric breakdown, flashover, gas insulation, sulphur hexafluoride (SF6) and trifluoroiodomethane (CF3I).
doi:10.1109/tpwrd.2016.2602259 fatcat:yixqyyqhr5egbnsp236c2cvvdi