Anti-misoperation electric device for disconnecting switch for electrified railway contact net

Abstract

The invention provides an anti-misoperation electric device for a disconnecting switch for an electrified railway contact net. The anti-misoperation electric device comprises a motor and a speed reducer, wherein the motor is used for providing power; the speed reducer has preset positive rotation limit angle and reverse rotation limit angle; further rotation of the speed reducer is limited by a limiting component fixed on the speed reducer and a position signal is sent out to an electric operating mechanism; a power output end of the speed reducer is provided with a change-over switch mechanism through a screw rod; the change-over switch mechanism is driven to act by rotation of the speed reducer-driven screw rod; and the change-over switch mechanism simultaneously starts closing of a breaking breaker and breaking of a closing breaker, or simultaneously starts closing of the closing breaker and breaking of the breaking breaker when the speed reducer rotates to the limit angles. According to the anti-misoperation electric device, positive rotation and reverse rotation of the motor are achieved by changing a positive electrode and a negative electrode of a power supply for a DC motor; and the power supply for the motor can be automatically cut off after breaking and closing are ended, so that the problems of misoperation, refusal-operation, false display and the like of the disconnecting switch can be effectively solved. The anti-misoperation electric device is suitable for coordination with an existing disconnecting switch; and anti-misoperation electric control of breaking and closing is achieved.

Description

technical field [0001] The invention belongs to the field of electrical switches, in particular to an electric device for preventing misoperation of an electrified railway catenary isolating switch. Background technique [0002] At present, my country's electrified railway has exceeded 70,000km, and a large number of electric isolating switches with remote control function are used on the electrified railway catenary to change the operation mode or realize system rescue under fault conditions. [0003] Most of the electric operating mechanisms of existing domestic isolating switches use electrical components such as contactors and relays to realize the forward and reverse switching of the motor. The remote control terminal (RTU) sends an opening and closing command to trigger the electric operating mechanism with a narrow pulse. The electric operating mechanism is equipped with a self-holding circuit, and the action is automatically completed. However, the remote control te...

AI Technical Summary

Problems solved by technology

However, the remote control terminal will be interfered by various electromagnetic waves in the environment during actual work, so it will issue wrong instructions, resulting in misoperation, refusal to operate, and misdisplay of the circuit breaker, making the railway catenary power supply and distribution system a potential safety hazard

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