| 摘要 |
<p>1,255,997. Arc rupturing in switches; vacuum switches; electromagnetic switches. GENERAL ELECTRIC CO. 13 March, 1969 [20 March, 1968], No. 13208/69. Heading H1N. An arrangement for interrupting a highvoltage direct-current circuit comprising a source 12, a load 14 and a smoothing capacitor 20 connected across the circuit, wherein a circuit-interrupter, e.g. a vacuum switch 25 is connected in the circuit on the load side of the capacitor 20 and a normally-open circuitmaking device 38 is connected across the circuit on the load side of the interrupter. When the circuit-interrupter 25 is opened, the circuitmaking device 38 is closed to permit the capacitor to discharge through the arc in the interrupter 25 and the device 38. The discharge current is oscillatory and causes a current zero to occur at the interrupter 25 so extinguishing the arc. The device 38 may be a triggered spark gap device with an auxiliary gap which is triggered when the circuit to a pulse source 56 is completed by the closing of auxiliary contacts 75 of the interrupter 25. An electromagnet may move the upper electrode 40 of the device 38 into engagement with the lower electrode 42 to extinguish the arc in the device 38. Multiple series-connected " breaks " may be used for each of the interrupter 25 and the device 38.</p> |
