Action mechanism of residual current operated circuit breaker

Abstract

The invention provides an action mechanism of a residual current operated circuit breaker. The action mechanism comprises a tripping coil fixed on a base of the circuit breaker, a lever pivotally arranged on the base, an indicating part, a reset spring for driving the lever to rotate towards a reset direction and an energy storage spring for driving the indicating part to linearly move outwards, wherein the indicating part is arranged on the base in a linear motion manner; the lever comprises a lever body capable of pivoting around a pivot, a first arm, a second arm and a third arm; the first arm, the second arm and the third arm stretch outwards from the lever body respectively; the first arm is pushed by the tripping coil to rotate the lever towards a tripping direction; the second arm directly drives a tripping shaft of the circuit breaker to move to trip the circuit breaker; and the third arm is matched with the indicating part, is used for limiting motion of the indicating part and locking the indicating part at a stable position when leakage tripping is not generated, and is used for accelerating rotation of the lever and releasing locking of the indicating part by the lever when leakage tripping is generated. The action mechanism of the residual current operated circuit breaker has the beneficial effects that the action mechanism is sensitive to act, fast in tripping and easy to manufacture and assemble.

Description

technical field

[0001] The invention belongs to the field of low-voltage electrical appliances, and relates to a leakage protection module of a residual current operated circuit breaker, in particular to an operating mechanism of a residual current operated circuit breaker. Background technique

[0002] The residual current operated circuit breaker is an essential device to ensure the safety of electricity consumption and switch circuits, and can protect electrical equipment and personal safety. In addition to the basic protection functions such as short circuit, the residual current operated circuit breaker also has the leakage protection function. When the leakage current reaches the rated value, the electromagnet coil is turned on to generate a magnetic field, which drives the iron core to move, thereby pushing the lock and unlocking the mechanism. , and at the same time drive the circuit breaker to trip through the lever and control the separation of the moving contact a...

Images