| 摘要 |
PURPOSE:To condense coolant gas containing noncondensing insulating gas efficiently, suppress the pressure rise in an outer shell and maintain excellent cooling performance by a method wherein the noncondensing insulating gas and the condensing coolant gas filling the outer shell are blown into a cooler or the low temperature coolant liquid in a reservoir. CONSTITUTION:In a gas insulated transformer constituted by an outer shell 3 in which a core 1 and a coil 2 are housed and which is filled with noncondensing insulating gas and condensing and electrically insulating coolant, an outside cooler 4 or a reservoir in the outer shell 3 which is filled with the coolant liquid 9 and a means 5 by which the coolant liquid 9 in the cooler 4 or in the reservoir is cooled are produced. Further, pipes 15 and 17 and a blower 16 by which mixed gas 8 of the non-condensed coolant gas and the noncondensing insulating gas in the outer shell 3 is supplied into the cooler 4 or into the coolant liquid 9 in the reservoir and a pump 12 and pipes 11 and 13 by which the coolant liquid 9 in the cooler 4 or in the liquid sink is sucked and supplied to the upper parts of the core 1 and the coil 2 are provided.
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