| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a gas-blast circuit breaking device that can execute a gas leak inspection without misjudgment at the time of releasing the closed state of a cutoff valve based on abnormality detection to reset it to a normal state. SOLUTION: Upon the input of a reset signal from a reset signal input part 7 for normal resetting at the time of a cutoff valve 6 being closed due to detection of an abnormal state, a valve opening/closing signal is outputted from a valve opening/closing control part 8 to put the cutoff valve 6 in opening/ closing action, and pressure is charged to execute a gas leak inspection. In order to measure pressure for the gas leak inspection after the lapse of specified time when pressure fluctuated by opening/closing of the valve is stabilized, the specified time is clocked by a stand-by timer 9, and then pressure is measured to judge gas leak. In case of no gas leak, a valve opening signal is outputted, so that a cutoff valve driving part 11 opens a cutoff valve to reset it to a normal state.</p> |
