断路器开断三相电路时工频恢复电压  

The Rated Frequency Resume Voltage of the Circuit-Breaker Switching off the Three-Phase Circuit

作　　者：李颖峰[1] 

机构地区：[1]陕西理工学院电气工程系,陕西汉中723003

出　　处：《电气电子教学学报》2008年第2期43-45,共3页Journal of Electrical and Electronic Education

摘　　要：断路器在开断三相电路时工频恢复电压大小与系统的中性点接地方式及短路故障方式有关,且因断路器开断三相电路的顺序而异。现有教材中对中性点直接接地系统的三相短路故障开断时工频恢复电压大小只给出了结论,未作分析。本文应用对称分量法对其分析讨论,有利于学生加深对工频恢复电压的理解,进而掌握交流电弧的特性及熄弧条件。The rated frequency resume voltage switching is related to neutral grounding operation modes, short-circuit fault modes and the order of three-phase circuit when the circuit-breaker switches off threephase circuit. Most teaching materials have only given the result about that, but no analysis. The paper analyzes and discusses about the method of symmetric component. It not only benefits understanding the rated frequency resume voltage, but also helps to grasp of the alternating-arc characteristic and condition of arc failure.

关 键 词：断路器 三相电路 工频恢复电压 

分 类 号：TM561[电气工程—电器]