Special intelligent circuit breaker for railway signal

Abstract

This is an intellective breaker for railway signal including a shell, control panel, electric elements and connecting card. The control panel is installed with power light, alarm light, reset button and shut off button. Electric elements include electromagnetic inductive sensor, CPU of control signal input and output, relay of NC point, human-machine communication set composed by power light, alarm light, shut off button and reset button, and working power. The NC point is linked to the main circuit of the electric elements crossing the sensor. In case of overloading, CPU automatically shut off power in different defer time according to sensor signals and alarm, then automatically resume power in defer.

Description

technical field [0001] The invention relates to an electric appliance protection device, which belongs to the technical field of electronic appliance control, in particular to a special intelligent circuit breaker for railway signals. Background technique [0002] In the railway signal control system, each station is equipped with many fuse tubes, whose function is to protect the normal operation of each equipment in the signal system, and to cut off the circuit in time to protect the Equipment Security. Because in practical application, the cause of the overcurrent is mostly the overcurrent pulse generated by various instantaneous disturbances, and after the disturbance disappears, the signal system returns to normal without maintenance. However, the fuse has been blown at the moment when the overcurrent occurs, and without updating the fuse, the signal equipment cannot resume normal operation, which also affects the normal operation of the train. In order to solve the fa...

AI Technical Summary

Problems solved by technology

However, the fuse has been blown at the moment of overcurrent. Without updating the fuse, the signal equipment can no longer resume normal operation, which also affects the normal operation of the train.

In order to solve the fault effects caused by frequent fuse breakage and the trouble of manually updating the fuse frequently, a kind of backup fuse was added on the basis of the original fuse in the early 1990s, so that the signal system can be connected to the main fuse. In the case of a fuse blown, the multifunctional fuse device that automatically switches to the standby fuse has the effect of alleviating the impact immediately. There are troubles of interrupting the work of the equipment, affecting the normal operation of the train, and having to manually update and set the fuse; at the beginning of this century, a circuit breaker that automatically cuts off the circuit by mechanical action appeared, which effectively eliminated the trouble of frequently updating the fuse, but Since there is no function of automatically restoring the connection circuit, it still needs manual cooperation to restore the normal operation of the equipment and the train, so it is still not ideal; The railway signal intelligent switch that can automatically delay the connection of the circuit effectively solves the trouble of manual repair, and has remarkable practicability and economy

However, in practical applications, it is found that it still has the disadvantage of poor applicability. Due to the wide variety of power supplies for railway signal equipment, the operating currents are different, and the ratings that can carry overcurrents are also different. For example, for the minimum For the overcurrent that occurs on equipment with an operating current of only about 0.2A, fuses, mechanical circuit breakers or intelligent switches in the prior art have no cut-off function; The safe carrying time is not a fixed value, it is related to the magnitude of the overcurrent value, so how to protect the safety of the signal equipment when the overcurrent occurs, and to maximize the function of the signal equipment as much as possible, this requires a A device with intelligent functions that can set different delay times for cutting off the circuit and automatically restoring the delay time for connecting the circuit after cutting off according to the magnitude of the overcurrent value that occurs on various devices; in addition, in view of the normal Due to the importance of operation, signal maintenance personnel must keep track of the real-time working status of each equipment, and there is an urgent need for real-time monitoring equipment with man-machine dialogue functions in order to strengthen monitoring and improve work efficiency

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