Self-reset type overvoltage and undervoltage protection structure

Abstract

The invention relates to a self-reset type overvoltage and undervoltage protection structure which comprises a moving contact, a moving contact bracket, a static core 1, a coil frame 1, a DC coil 1, a DC coil 2, a pressing spring 1, a static core 2, a magnetic yoke, a coil frame 2, a magnetic conductive plate, a pressing spring 2, a moving core, a left tension spring, and a right tension spring. When a line is in an overvoltage or undervoltage state, the DC coil 1 does not work, the DC coil 2 is instantaneously turned on and conducted, a generated magnetic field attracts the moving core, the moving core moves rightward to press the pressing spring 1 and the static contact to close and the moving contact is pushed, thus the moving contact is allowed to counterclockwise rotate for a certain angle around a spring pass dead spot position on the moving contact bracket, the spring passes a dead spot, finally a disconnection state is maintained, and the moving core returns to an original position under the reverse elasticity of the pressing spring 1, and vice versa. The self-reset type overvoltage and undervoltage protection structure is mainly used in a self-reset type overvoltage and undervoltage protector, the magnetic field generated by the coil is used to drive the moving core, thus the moving core pushes the moving contact, and the connection and disconnection of the moving contact and the static contact are realized.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, in particular to a self-resetting overvoltage and undervoltage protection structure. [0002] technical background [0003] At present, the self-resetting overvoltage and undervoltage protectors on the market all use relays as electrical breaking devices, and they use the magnetic holding principle. However, there is a big disadvantage in using the relay as the transfer mechanism, that is, the electrical gap of this electronic breaking is too small, and the distance between the contacts does not exceed 1mm, and there is no arc extinguishing ability or breaking ability at all. In the case of current operation, once an overvoltage or undervoltage occurs, the contacts will be burned or welded together, making it impossible to break the power supply, causing damage to home appliances, and even the dangerous consequences of spontaneous combustion and fire. Contents of the invention [000...

AI Technical Summary

Problems solved by technology

However, there is a big disadvantage in using the relay as the transfer mechanism, that is, the electric gap of this electronic breaking is too small, and the distance between the contacts does not exceed 1mm, and there is no arc extinguishing ability or breaking ability at all. In the case of current operation, once the overvoltage or undervoltage occurs, the contacts will be burned or welded together, and the power supply cannot be disconnected, causing damage to home appliances, and even the dangerous consequences of spontaneous combustion and fire

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