Patent ID: 7816618

Claim:
A gas insulated switchgear in which a pair of contacts are arranged in a sealed container filled with an insulating gas having a global warming potential lower than that of SF 6 gas, electricity being conducted during conduction by maintaining the two contacts in a contact state, and the two contacts opening during current interruption, to extinguish an arc generated between the two contacts by blowing the insulating gas thereon, comprising: a gas flow generating means for blowing the insulating gas onto the arc generated between the contacts during an opening operation of the contacts, wherein said gas flow generating means comprises a pressure accumulation space, pressure raising means for raising a pressure of the pressure accumulation space, and a gas flow channel that joins the pressure accumulation space and the arc, wherein said pressure raising means comprises a means for raising the pressure of the pressure accumulation space by introducing into the pressure accumulation space thermal energy generated in the arc, wherein said insulating gas is a mixed gas comprising greater than or equal to 20% and less than or equal to 50% of O 2 gas and at least 50% of another gas comprising the element C, wherein said gas comprising the element C is any of CO 2 , a perfluorocarbon, and a hydrofluorocarbon, wherein an absorbent for absorbing water, CO, and O 3 is arranged in said sealed container, and wherein said sealed container is provided with a detecting device configured to detect CO gas and O 3 gas inside the sealed container.