Overvoltage and undervoltage tripper of small-sized breaker

Abstract

An overvoltage and undervoltage tripper of a small-sized breaker solves the problem of complicated structure of an existing tripper and comprises a casing. The casing is provided with a control circuit board and a tripping driver inside. The tripping driver comprises a coil former, a movable iron core, a fixed iron core and an ejector rod, a rotation part is sleeved inside the casing, the ejector rod corresponds to the rotation part, the rotation part is provided with a connecting shaft, the connecting shaft penetrating through an arc groove on the casing to be connected with a lock catch of the breaker, the casing is provided with a guide mechanism, and the guide mechanism is matched with the rotation part. The overvoltage and undervoltage tripper of the small-sized breaker has the advantages that the motion manner of rotation of the single rotation part is created, tripping of the breaker is realized, transmission mechanism of an original tripper is simplified, size of the tripper can be reduced indirectly, assembling difficulty is reduced, and labor is saved. Furthermore, the lock catch can move in a unique and accurate track by the aid of the guide mechanism arranged on the casing.

Description

technical field [0001] The invention relates to the field of electrical protection devices, in particular to an overvoltage and undervoltage release for a small circuit breaker. Background technique [0002] Miniature circuit breakers refer to low-voltage circuit breakers used in AC 50 / 60 Hz, rated voltage 230 / 400 volts, and rated current below 63 amperes. They are often used in industrial, commercial, high-rise and residential buildings. The miniature circuit breakers used in occasions with strict voltage requirements have undervoltage and overvoltage protection functions. Generally, a separate undervoltage and overvoltage release is assembled on the side of the miniature circuit breaker. The undervoltage and overvoltage release generally includes a housing, an undervoltage and overvoltage control circuit board, a trip driver and a transmission mechanism. When the undervoltage or overvoltage occurs, the trip driver operates and the small The lock and jumper in the circuit ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of complex structure of the existing release in the background technology, the present invention provides an overvoltage and undervoltage release for small circuit breakers with simple structure, low cost and stable performance

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