SF_(6)断路器喷口烧蚀研究  

Study on Nozzle Ablation of Sulfur Hexafluoride Circuit Breaker

作　　者：史俊 崔明硕 SHI Jun;CUI Mingshuo

机构地区：[1]西安西电开关电气有限公司,陕西西安710077

出　　处：《电力系统装备》2025年第1期134-136,共3页Electric Power System Equipment

摘　　要：喷口是SF_(6)断路器实现灭弧的关键零件,其尺寸直接决定了断路器的开断性能.在断路器的使用周期中,喷口喉道受电弧作用,不断烧蚀扩大,但是在其使用周期中,喉道变化的尺寸未知.为预测喷口烧蚀情况,以及研究高压交流SF_(6)断路器在短路开断过程中喷口尺寸变化情况,文章提出一种适用压气式灭弧室的喷口在开断电弧烧蚀作用下喉道变化的计算方法.该方法将电弧作用过程分为有气流冲刷和无气流冲刷的两个过程,并对喷口烧蚀过程中相关电流和材料烧蚀系数的相关性进行了研究,且进行了公式化,同时结合试验数据对该方法和公式的有效性进行了验证.The nozzle is the key part of SF_(6) circuit breaker to realize arc extinguishing,and its size directly determines the breaking performance of the circuit breaker.In the service cycle of the circuit breaker,the nozzle throat is affected by the arc,and the ablation is constantly expanded,but the size of the throat change is unknown during its service cycle.In order to predict the ablation of the nozzle and study the size change of the nozzle of SF_(6) circuit breaker during short-circuit breaking,a calculation method of the throat change of the nozzle applied to the pressurized gas interrupter under the ablation of the breaking arc is proposed.The method divided the arc action process into two processes with airflow erosion and no airflow erosion,and the correlation between the relative current and the material ablation coefficient in the nozzle ablation process was studied and formulated.At the same time,the effectiveness of the method and formula was verified by combining the experimental data.

关 键 词：SF_(6)断路器 喷口 电弧 燃弧时间 材料烧蚀 

分 类 号：TM561[电气工程—电器]