| 摘要 |
In a gas insulated electric apparatus having a plurality of gas sections filled with insulating gas, locating device orientates position of a gas section, in which insulation abnormalities are produced, on the basis of a detection signal from sensors disposed in each of predetermined gas sections and at the same time hindering degree diagnosing device diagnoses the degree and the kind of the insulation abnormalities, while comparing a detection signal from the sensors with data stored in a data base. A valve control generates a valve control signal, responding to the locating device and the hindering degree diagnosing device and trip circuit generates a valve opening signal for opening an electromagnetic valve disposed in a gas section, in which insulation abnormalities are produced, responding to this valve control signal. Insulating gas injecting and evacuating device injects an insulating gas different from the insulating gas, with which the gas sections are filled beforehand, in the gas section, for which the electromagnetic valve opened by the valve opening signal is disposed, or evacuates a predetermined amount of the insulating gas, with which the gas sections are filled beforehand, so as to increase insulation strength.
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