| 摘要 |
<p>PURPOSE:To reliably detect drop of a gas pressure of a device or cable, by detecting a gas differential pressure between phases or adjoining sections at an identical point of a multiphase gas insulating device or cable. CONSTITUTION:A differential pressure type pressure gauge or a differential pressure type pressure switch is connected between different phases or sections of a gas insulating device or cable, and a gas pressure is monitored by detecting a drop in pressure of one side through detection of a difference in gas pressure between the phases or sections. For example, the differential pressure type pressure gauges or the differential pressure type pressure switches 8, 9, and 10 are connected between their respective phases of 3 phases gas insulating cables or gas insulating devices 5, 6, and 7 at an identical points with a gas line 11 to compare the gas differential pressures between an A-phase and B-phase, between a B-phase and C-phase, and between a C-phase and A-phase with each other. This permits a gas pressure to be simply monitored irrespective of a temperature change.</p> |
