The Study And Realization Of Electric Locomotive Automatic Passing Catenary Phase Insulator

There is a cross point between different phases in A. C. catenaries and we set Phase splitting device in order to avoid Short-circuit accidents when Pantograph slip and short different phases. Usually, we call Phase splitting as Phase Insulator, which is composed of two-glass fiber reinforced plastic. The section without power between the two Insulators is called Neutral Section. The symbols, which are marked with opening, closing and forbidding rising two Pantographs, are located at the ends of the Phase Splitter. And these symbols prompt drivers to trip the LINE CIRCUIT-BREAKER, and rise or lower Pantograph when an Electric locomotive passes the Phase Splitting. It not only bothers drivers but also increases unsafe factors if drivers operate unseasonably or incorrectly because the series of steps must be finished in a short time. At the same time, when the motor is running at a steep slope, it will loss a great much of velocity, and people in the train will feel uncomfortable, so economic profit will be affected. At this situation, several of Automatic Passing Phase Splitting Devices are come into being.Firstly, the paper studies a kind Automatic Passing Phase Splitting Device that uses the mode of combining the controlling on the earth and switching Breaker on the wire pole, and utilizes the technology of closing the Breaker at the point of voltage wave crossing zero to restrain the over-voltage and over-current. The sensor system makes use of microwave communication technology. And there have two suits system. One is most and the other is spare. This method decreases faults and wrongly-report rate. At the same time, when the system is running wrongly, the mode of Automatic Passing Phase Splitting will be transferred to one Manual Passing Phase Splitting byswitching several isolating switches and powering the LED symbol.Secondly, the paper also discusses principles of occurring over-voltage and over-current at details. By emulating and computing, the paper puts forward the method of restraining the over-voltage and over-current at last.Thirdly, According to the principle of control and protect, the paper programs the controlling system with the Multifunction Electronic Device (D25) and its programming software (CONFIG PRO).At last, the paper analyzes on-the-spot survey wave and data, and draws the conclusion that this Automatic Passing Phase Splitting Device is economical, simple, reliable and applicable.