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

Claim 3:
4. 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 circuit facing toward the main shaft; and
a light-emitter and a light-receiver disposed on the circuit and side by side,
wherein the light-emitter and the light-receiver face toward the main shaft,
wherein a plate plane of the main shaft is configured to reflect light emitting from the light-emitter for the light-receiver to receive as reflected light,
wherein the bracket is disposed on one side face of the main shaft,

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