| 摘要 |
PURPOSE:To enable a quasi-stationary gas pressure, a stationary gas pressure and an impact gas pressure to be detected by arranging an electronic circuit for detecting the quasi-stationary pressure or the stationary pressure and another electronic circuit for detecting the impact pressure in the same vessel, converting the signals of both the circuits to light signals and transmitting them to a receiver. CONSTITUTION:A partition diaphragm 33 is provided on one end of a gas piping 32 connected to the tank of a gas-insulated switchgear at the other end and a liquid portion 34 composed of gas, oil and the like is partitioned off. A diaphragm 35 made of stainless steel is provided on the end portion of a piping for accommodating the liquid portion 34. A piezo-resistance element 36 for converting the strain of the diaphragm 35 to the quantity of change in resistance is mounted on the outer surface of the diaphragm 35. The element 36 and a resistance element 37 form a bridge circuit. An electronic circuit 70a with slow time response characteristics for measuring a quasi-stationary or stationary gas pressure value and an impact gas pressure measuring circuit 70b with quick time response characteristics are connected to the bridge circuit. The outputs of the circuits 70a and 70b are converted to light signals by light converting circuits 39a and 39b and transmitted to a receiver side via optical cables 41a and 41b, respectively.
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