An Influence of New Arc Quenching Methods for Improving the Interrupting Capacity of Low Voltage Circuit Breaker
Low voltage circuit breakers are widely used in power distribution systems for rapid interruption of fault currents to assure the reliability of the power supply. While power distribution systems are demanding transformers with higher capacity than ever, there is an increase in the number of shortcircuit current accidents. To prevent such accidents, molded case circuit breakers with improved shortcircuit current interrupting capacity are needed. Improved interrupting capacity requires raising the increase rate of the arc voltage by current limiting and minimizing the thermal stress, mechanical disturbance, and interference from electronic devices. This paper is focusing on understanding the interrupting capability with respect to double contact structure, shape of grid, and puffer assisted self quenching that are based on the shape of the contact system in the current molded case circuit breaker. This paper also discusses the development of an arc diagnosis system for analyzing arc movement on the contact system.
Jung-Hun Kwon Sung-Hoon Cho Kee-Joe Lim Kil-Sou Kim
44-323 Chungbuk National Univ, Gaesin-dong, Heungdeok-gu, Cheongju-si, Chungbuk, South Korea LS Indu 44-323 Chungbuk National Univ,Gaesin-dong, Heungdeok-gu, Cheongju-si, Chungbuk, South Korea LS Indus
国际会议
西安
英文
642-646
2011-10-23（万方平台首次上网日期，不代表论文的发表时间）