公开(公告)号：US20240297000A1

公开(公告)日：2024-09-05

申请号：US18281245

申请日：2022-02-16

Applicant: LS ELECTRIC CO., LTD.

Inventor： Woonghyeob SONG ,  Jungwook SIM ,  Sunghee KANG ,  Dongjin YUN ,  Jaeho LEE

IPC: H01H9/52 ,  H01H9/54

CPC classification number: H01H9/52 ,  H01H9/548

Abstract: The present disclosure relates to a semiconductor circuit breaker, and more particularly, to a semiconductor circuit breaker having excellent heat dissipation. The semiconductor circuit breaker according to one embodiment of the present invention comprises: a switching device provided in an upper space of an enclosure; an air gap switch (mechanical switch) provided in the upper space and disposed forward of the switching device; an electric circuit disposed on an upper portion of the switching device; a heatsink provided in a lower space of the enclosure and coupled to a lower portion of the switching device; and a cooling fan provided in the lower space and disposed in a front portion of the enclosure.

公开(公告)号：US20230216291A1

公开(公告)日：2023-07-06

申请号：US17928537

申请日：2021-03-30

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jungwook SIM ,  Jaeho LEE ,  Woonghyeob SONG ,  Sunghee KANG

IPC: H02H7/20 ,  H02M1/34 ,  H03K17/567 ,  H02H3/027 ,  H02H3/05

CPC classification number: H02H7/20 ,  H02M1/34 ,  H03K17/567 ,  H02H3/027 ,  H02H3/05

Abstract: The present disclosure relates to a solid insulated switch using a semiconductor comprising a main circuit unit connected between systems on both sides thereof, and which has a first semiconductor and a second semiconductor arranged in a series; a snubber circuit having a capacitor and a resistor arranged in a series, one end connected in parallel to the front end of the first semiconductor switch, and the other end connected in parallel to the rear end of the second semiconductor switch; a freewheeling circuit, having a diode and a resistor arranged in a series, one end connected to a common contact between the first semiconductor switch and the second semiconductor switch, and the other end connected to the ground; and a mechanical switch for ensuring physical insulation after fault current interruption.