Arc chamber vacuum interrupter

vacuum interrupter design is the core of the low voltage circuit breaker research and development. The performance of the interrupter is directly related to the breaking performance of the low-voltage circuit breaker, which determines whether the product can meet the requirements of intelligent, highly reliable new current selective protection and fault location. To this end, domestic and foreign scholars and research institutions have been committed to the field of technical research, and access to a large number of applications, such as through the double breakpoint arc technology to improve the arc voltage and mechanism speed; through gas production of reasonable settings, Improve the arc voltage and dielectric recovery strength, etc., to effectively improve the product breaking performance.

At present, the design and analysis of the low-voltage circuit breaker Vacuum interrupter for vacuum circuit breaker is mainly through the test method and simulation analysis method. The experimental method mainly uses high-speed photography, optical fiber array and so on to study the movement characteristics of arc; simulation analysis method mainly through the establishment of arc model to study the arc. Product design is often used decoupling approach to mechanical movement, magnetic blowing layout, gas flow, respectively, were designed. In this paper, the fluid analysis model is established by the airflow field of the interrupter, and the simulation software is used to simulate and evaluate the structure of a small circuit breaker.The arc of the arc chamber is assumed to be in the event of a fault current, and the static and static contacts are opened. The medium of the contact gap produces a very high temperature, which emits strong light and conducts the gas. The calculation analysis involves electromagnetic fields, Gas flow field and temperature field.