公开(公告)号：US10811209B2

公开(公告)日：2020-10-20

申请号：US16502732

申请日：2019-07-03

Applicant: LSIS CO., LTD.

Inventor： Jeongjae Lim ,  Kihwan Oh

IPC: H01H71/52 ,  H01H71/02 ,  H01H71/16 ,  H01H89/04

Abstract: A switching mechanism of a circuit breaker includes a case, a handle rotatably coupled to a side plate fixed to the case, a U-pin coupled to a lower portion of the handle, a lever coupled to the U-pin, and a crossbar disposed in a mounting portion protruding from the case to be perpendicularly movable, the crossbar being moved by receiving contact pressure of the lever, wherein the lever is provided with a contact pressure portion formed in a curved surface on a lower surface thereof, to press the crossbar perpendicularly downward upon closing a circuit.

公开(公告)号：US10811207B2

公开(公告)日：2020-10-20

申请号：US16511707

申请日：2019-07-15

Applicant: LSIS CO., LTD.

Inventor： Jeongjae Lim ,  Kihwan Oh

IPC: H01H71/02 ,  H01H71/24

Abstract: The present disclosure relates to an arc extinguishing device of a molded case circuit breaker which includes a fixed contactor fixedly provided on part of a base assembly case; a movable contactor brought into contact with or separated from the fixed contactor; and an arc extinguishing unit configured to extinguish an arc generated when the movable contactor is separated from the fixed contactor, and the arc extinguishing unit including a pair of side plates provided on the base assembly case; and a plurality of grids provided to have a predetermined distance between the pair of side plates, and the grid including a first grid formed with a first cutout portion on a first side surface where an arc is generated; and a second grid formed with a second cutout portion having a depth different from that of the first cutout portion on a second side surface where an arc is generated.

公开(公告)号：US10672579B2

公开(公告)日：2020-06-02

申请号：US15914738

申请日：2018-03-07

Applicant: LSIS CO., LTD.

Inventor： Sanghyun Woo ,  Jeongjae Lim ,  Seungjin Ham

IPC: H01H83/00 ,  H01H71/24 ,  H01H71/40 ,  H01H73/66 ,  H01H73/50 ,  H01H71/50 ,  H01H71/52 ,  H01H83/14

Abstract: The circuit breaker according to the present invention comprises: a pair of contact mechanisms for switching a pair of circuits; a switching mechanism for driving the pair of contact mechanism to a circuit opening position or a circuit closing position; a trip bar rotatable to a first position for latching the switching mechanism or to a second position for releasing the switching mechanism; and an instant trip mechanism for pressing the trip bar to rotate to the second position, wherein the instant trip mechanism comprises a pair of armature assemblies and movable to a position for pressing the trip bar to rotate to the second position; and a pair of electromagnets provided to face the pair of armature assemblies and applies a magnetic attractive force to the pair of armature assemblies in response to the fault current on the circuit requiring an instant trip.