[1] IEC 60480–2004, “Guidelines for the checking and treat- ment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use”, 2004.
[2] X. S. Zhuang, “The examination and judgment of SF6 elec-trical equipment discharge failure,” Asia-Pacific Power and Energy Engineering Conference (APPEEC’09), 2009.