Pressurized CF3I-CO2 Gas Mixture under Lightning Impulse and its Solid By-Products

M. S. Kamarudin (Universiti Tun Hussein Onn Malaysia, Malaysia)
A. Haddad (Cardiff University, United Kingdom)
B. C. Kok (Universiti Tun Hussein Onn Malaysia, Malaysia)
N. A. M. Jamail (Universiti Tun Hussein Onn Malaysia, Malaysia)

International Journal of Electrical and Computer Engineering
Vol 7, No 6: December 2017

This paper describes tests results on the CF3I-CO2 gas mixtures as an alternative for SF6 gas as to be used as insulating medium in high voltage applications. Pressurized CF3I-CO2 gas mixtures are subject under standard lightning impulse voltages at both positive and negative polarities. Under rod-plane configuration, the electrode gap length and gas pressure are varied accordingly. Upon completion of the laboratory tests, SEM and EDX analyses are carried out to assess the solid by-products. It was found that higher gas mixtures provide better insulation strength. In terms of weight, 50% of the solid by-product is found to be iodine.