| 摘要 |
<p>PURPOSE:To reduce the size of a preventive security system by arranging a pressure sensor in the gas section of a gas insulated machine having ground fault gas capacity lower than a specific level, while arranging a pressure sensor and an impact gas pressure sensor in the gas section having ground fault gas capacity higher than the specific level. CONSTITUTION:Sections, charged with high voltage, of an arrester 2, a PT 3, a ground switch 4, a disconnecting switch 5, a CT 6, a circuit breaker 7, and the like are connected through a bus 8 with BUSes (a), (b), then they are contained, together with insulating gas, in a plurality of grounded metal housings, shown by dot and dash lines, thus forming a high voltage network. Grounded metal housings for containing respective machines 2-7 other than the BUSes (a), (b) are partitioned into subsections, and only a pressure sensor 60 is fixed thereto. A large metal housing for containing the BUSes (a), (b) is provided with a pressure sensor 60 and an impact gas pressure sensor 61 having large dimension. By such arrangement, installation space is saved, the size of the preventive security system is reduced and maintenance/inspection is facilitated.</p> |
