| 摘要 |
<p>PURPOSE:To specify a gas chamber where an arc fault is generated and to enhance reliability, by providing a differential pressure value to an adjacent gas space and shortcircuiting an electric contact when differential pressure is generated. CONSTITUTION:A differential pressure chamber 22 of which the bottom surface is inclined in a recessed shape is formed to the central part of the cylindrical insulating container 15 inserted on the way of external piping connecting the gas chamber of a gas insulating electric device and a metal spherical differential pressure valve 21 is provided in said chamber 22. When the pressure of the gas introduced from piping 12 becomes higher than that of the gas introduced from piping 13, the flow of the gas is generated in the differential pressure chamber 22 through an air hole 23 and the valve 21 moves left to shortcircuit an electric contact 17 consisting of contact pieces 17a, 17b and an alarm oscillator 24 is operated through lead-out wires 19a, 19b. Therefore, no erroneous detection due to electromagnetic induction is generated and a gas chamber generating faults can be specified and the reliability of a detection result is enhanced.</p> |
