| 摘要 |
A pair of fixed arc electrodes (30a , 30b) are arranged so as to face each other inside an airtight container that is filled with an arc- extinguishing gas (1). This gas- blast circuit breaker is equipped with a compression puffer chamber (12) for storing a pressurized gas (35), which is obtained by pressurizing the arc- extinguishing gas (1), and an insulated nozzle (32) for guiding the pressurized gas (35) from the compression puffer chamber (12) toward an arc discharge (17). A buffer chamber (36) for temporary storage of a hot exhaust gas (20), which is generated by the heat of the arc discharge (7) is formed. A pressurized gas- distribution space (43), which connects to the compression puffer chamber (12), is formed. An opening/closing part (41) is in a closed state in order to prevent the hot exhaust gas (20) from flowing into the pressurized gas distribution space (43) during the first half of a current interruption operation, and the opening/closing part (41) opens in order to allow the pressurized gas (35) to flow during the second half of the current interruption operation. |
