Title :
Puffer Characteristic Calculate and Test of High Voltage SF6 Circuit Breaker in Different Nozzle Throat Dimensions
Author :
Xin, Lin ; Ke-bin, Liu
Author_Institution :
Coll. of Electr. Eng., Shenyang Univ. of Technol., Shenyang, China
Abstract :
Based on the first law of thermodynamics and the law of hydrokinetics by this paper, the mathematic model of the pressure characteristic in different nozzle throat dimensions is established for the 252 kV SF6 circuit breaker, and the pressure characteristic curve of the arc-extinguishing chamber can be obtained through computation. In addition, the result of the pressure characteristic in different throat length can be achieved by the experiment. It indicates that the result of the computation is right through compared and the affect to the pressure characteristic by different nozzle throat diameters and throat length. And the gas blow through the throat plays an important rule to quench the arc.
Keywords :
SF6 insulation; gas blast circuit breakers; nozzles; arc quenching; arc-extinguishing chamber; high voltage SF6 circuit breaker; law of hydrokinetics; law of thermodynamics; nozzle throat dimensions; pressure characteristic curve; puffer characteristic calculation; voltage 252 kV; Circuit breakers; Circuit testing; Educational institutions; Equations; Fault currents; Mathematical model; Mathematics; Sulfur hexafluoride; Thermodynamics; Voltage; gas chamber; high voltage SF6 circuit breaker; nozzle throat dimension; pressure feature;
Conference_Titel :
High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-3823-5
Electronic_ISBN :
978-1-4244-2810-6
DOI :
10.1109/ICHVE.2008.4773984
