Gas circuit breaker

摘要

A pair of arcing contacts 3 and 5 facing each other are placed in a tank 1 to perform opening and closing operation, and a puffer cylinder 7 is coaxially provided on the circumference of one arcing contact 5. A puffer chamber 9 is comprised of the puffer cylinder 7, a fixed piston 6, and a hollow rod 8. An insulating nozzle 4 forming a space communicating with the puffer chamber 9 is provided. An exhaust tube 2 for exhausting and cooling hot gas discharged from an arc produced in the insulating nozzle 4 is provided on the circumference of the other arcing contact 3. A structure 11 for temporarily reducing the flow path area is provided on the inner circumferential surface at short of the end portion of the exhaust tube 2.

主权项

1. A gas circuit breaker comprising:
a pair of arcing contacts facing each other in a tank to perform opening and closing operation; a puffer cylinder coaxially provided on the circumference of one of the arcing contacts; a puffer chamber being composed of the puffer cylinder, a fixed piston, and a hollow rod; an insulating nozzle forming a space communicating with the puffer chamber; and an exhaust tube provided on the circumference of the other arcing contact to exhaust and cool hot gas, the hot gas being discharged from an arc being produced in the insulating nozzle, wherein the exhaust tube has a structure for temporarily reducing the flow path area, the structure being provided on the inner circumferential surface at short of an end of the exhaust tube, the structure being located between an end of the other arcing contact and the end of the exhaust tube.