Electrical isolation switch used in high-voltage box of motor train unit

Abstract

The invention discloses an electrical isolation switch used in a high-voltage box of a motor train unit. The electrical isolation switch comprises an auxiliary contact, a motor, a contactor for controlling forward rotation or backward rotation of the motor, and two supporting insulators, wherein the top of one supporting insulator is connected with a wire-outlet seat while the top of the other supporting insulator is movably connected with one end of a movable conductive rod through a pin; the length of the movable conductive rod is not less than the distance between the two supporting insulators; the middle part of the movable conductive rod is connected with an insulating pull rod; the other end of the insulating pull rod is connected with a transmission connecting lever; the motor drives the transmission connecting lever to move through a transmission shaft; the motor is also provided with a cam through the transmission shaft in a sleeving manner; and the auxiliary contact is shifted in the rotation process of the cam. The electrical isolation switch used in the high-voltage box of the motor train unit is used for performing an isolation operation of the motor train unit in a pantograph offline-contact state; after the electrical isolation switch is powered on, switch-on and switch-off operations can be performed; and in addition, the influence on the operating state from weather is relatively low, and the electrical isolation switch is simple and reliable in structure, less in parts, low in failure rate, and capable of ensuring safety of fault electric appliances and the safety operation of the motor train unit.

Description

technical field [0001] The invention belongs to the technical field of electric switches, and in particular relates to an electric isolating switch used in a high-voltage box of an EMU. Background technique [0002] The isolating switch is widely used in the main circuit of railway vehicles such as EMUs. It is installed in the high-voltage box. Its main function is to optimize the operating conditions of the high-voltage equipment. Isolate, maintain the operation of EMUs, reduce machine failure accidents caused by equipment failures, and ensure the safe operation of EMUs. At present, the high-voltage box of the EMU mainly uses a pneumatic isolating switch, but the pneumatic isolating switch is greatly affected by the climate, its structure is complex, and there are many parts, resulting in a high failure rate. Contents of the invention [0003] The purpose of the present invention is to provide an electric isolating switch used in the high-voltage box of the EMU, which so...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an electric isolating switch used in the high-voltage box of the EMU, which solves the problems of the existing pneumatic isolating switch with complicated structure and great influence of climate factors

Images