Patent ID: 11875954
Assignee: LS ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 2:
3. A vacuum circuit breaker comprising:
a main circuit having a vacuum interrupter, wherein the vacuum interrupter includes:
a fixed electrode fixedly received in an insulating container;
a fixed contact disposed at one end of the fixed electrode;
a movable electrode installed in the insulating container, wherein the movable electrode is movable downwardly or upwardly; and
a movable contact disposed at a first end of the movable electrode, wherein the movable contact contacts or is spaced from the fixed contact;

a push rod assembly having a push rod coupled to a second end of the movable electrode for raising up or lowering the movable electrode;
a main shaft having a first main shaft end coupled to the push rod and a second main shaft end pivotably coupled to a mechanism assembly, wherein the main shaft transmits a driving force to the push rod; and
a motion sensing device including:
a sensor module installed adjacent to the main shaft for sensing a motion state of the main shaft; and
a bracket coupled to the sensor module and supporting the sensor module,
wherein the sensor module includes:
a pair of circuits facing toward each other while the main shaft is interposed therebetween;
a light-emitter disposed on a first one of the pair of circuits and emitting light; and
a light-receiver disposed on a second one of the pair of circuits, and facing toward the light-emitter, and receiving light emitting from the light-emitter, wherein the bracket is coupled to the pair of circuits,

wherein the motion sensing device further includes a plurality of sensing slits extending through the main shaft, wherein the light emitting from the light-emitter passes through the plurality of sensing slits, wherein the plurality of sensing slits are spaced apart from each other by a predefined spacing.