The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For the rationality of optimization of 126kV SF6 circuit breaker opening and closing, it calculates and analyzes the matching characteristics of circuit breaker and motor drive mechanism. And then, the corresponding relationship between the contact movement and the permanent magnet motor is obtained. The contact speed of circuit breaker is mainly determined by the rotation speed of permanent magnet...
The permanent magnet direct-driven motor for high voltage circuit breaker should not only meet the requirements of the speed, high starting torque and dynamic response ability, but also to meet the mechanical life requirements of the operation. In this paper, a new type of permanent magnet synchronous motor based on V-type structure is presented. It is shown by theoretical analysis and parameters...
High voltage SF6 circuit breaker must meet the breaking requirement for large short-circuit current, and ensure absence of breakdown after breaking small current. A 126kV high voltage SF6 circuit breaker was used as the research object in this paper. Based on the calculation results of non-equilibrium arc plasma material parameters, the distribution of pressure, temperature and density were calculated...
When SF6 was designated as a green house gas to be reduced, there has been a wish to use an alternative insulating gas to replace pure SF6 gas. And a fluoroketon, C5F10O attracts great attention as a potential substitute. In this paper, the breakdown characteristics of C5F10O/CO2 as mixtures in nonuniform electric filed and the variation of the mixing ratio with elevation were studied. The positive...
SF6 has been widely used in electrical industry because of its excellent electrical capabilities. However, due to its extremely high Global Warming Potential (GWP), researchers have done lots of investigations on SF6 alternative gases during the last few decades. Unfortunately, all the substitutions have their own drawbacks and limitations and can't be applied in practice. In this paper, the critical...
Mechanical characteristics, including the displacement curves of the movable contacts and coil current curves are the most common routine monitoring objects of high voltage circuit breakers to evaluate the machines' condition. Generally, a high-performance mechanical characteristic tester has the ability to offer dozens of parameters consisting of stroke, speed, magnitude of current and so on. Besides,...
The contact resistance is important for electrical contact. The modeling method based on fuzzy logic is used to model contact resistance. The experiment is designed, the training data and testing data are obtained through experiment. After analyzing the advantages and disadvantages of basic particle swarm optimization algorithm, the improved algorithm is developed by combining basic particle swarm...
A new design of Thomson coil (TC) actuator based on pressure buffer for high-speed switch (HSS) is proposed, in which the pressure buffer is realized by utilizing the internal flow field variation caused by the fast moving of metal plate in the enclosed actuator. The dynamic characteristics of the actuator have been investigated by using a new model with multiphysics field effects of flow field, transient...
This paper presents a novel electromagnetic repulsion mechanism with pressure buffer included, in which the influence of flow field variation on motion characteristic of mechanism is investigated in detail. A new 2D-axisymmetric cylindrical coordinate model is constructed and described by a set of multi-physical equations reflecting the flow field, transient electromagnetic field, electric circuit...
This paper applies a method of motor direct drive high voltage circuit breaker (HVCB), through establishing the simulation model calculation and the circuit breaker prototype test, the control capability during the opening and closing operations is investigated. In this operating mechanism, the travel of the moving contact of HVCB is controlled by the permanent magnet synchronous motor (PMSM). A simulation...
The vibration signal can reflect the operating process of the mechanism of high voltage circuit breaker. The characteristics of the vibration of a spring mechanism circuit breaker in time and frequency domain and its variation rule along with operation times during the mechanism endurance test were investigated in this paper. Based on the comprehensive analysis of the signals of more than 1000 no-load...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.