Switching mechanism for motor protection circuit breaker
AssigneeLS Industrial Systems Co., Ltd.
InventorHwan-Chang Kil
Life of this patent
Estimating the term…
Abstract
Disclosed is a switching mechanism for a motor protection circuit breaker capable of reducing a force required to adjust a handle, and capable of enhancing the reliability to break a circuit. The switching mechanism for a motor protection circuit breaker comprises a push link having an outer circumferential curved surface of a varying cam profile, so as to enhance a function to break the circuit by pressing movable contact plates.
Claims8
A switching mechanism for a motor protection circuit breaker, comprising a push link having an outer circumferential curved surface of a varying cam profile, so as to enhance a function to break a circuit by pressing movable contact plates.
A switching mechanism for a motor protection circuit breaker, comprising:
- a handle serving as a means to manually adjust a motor protection circuit breaker to an ‘ON’ position or an ‘OFF’ position;
- fixed contacts;
- movable contacts configured to be movable to an ‘ON’ position contacting the fixed contacts, an ‘OFF’ position or a ‘TRIP’ position separated from the fixed contacts;
- movable contact plates configured to support the movable contacts;
- a link mechanism connected to the handle, and configured to transmit a manual operating force;
- a latch connected to the link mechanism, and displaceable to a position for locking the link mechanism and a position for releasing the locked state of the link mechanism;
- and
- a trip spring configured to provide a driving force for breaking a circuit,
- wherein the switching mechanism for a motor protection circuit breaker further comprises a push link rotatable to a position to break the circuit by pressing the movable contact plates, and to a position for stopping the pressing of the movable contact plates, having a part connected to the link mechanism and a part connected to the trip spring, and having an outer circumferential curved surface of a varying cam profile so as to enhance a function to break the circuit by pressing the movable contact plates.
Dependencies are inferred from the claim text.