公开(公告)号：US20220206069A1

公开(公告)日：2022-06-30

申请号：US17601576

申请日：2020-03-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： Woo-Young CHOI ,  Hyun-Wook LEE

IPC: G01R31/327 ,  H01H33/664

Abstract: The present disclosure relates to a contact monitoring device for a vacuum circuit breaker, which may compensate for errors of a contact monitoring device capable of monitoring a contact wear amount in a vacuum interrupter, and to a vacuum circuit breaker comprising same. According to the present disclosure, the contact monitoring device for a vacuum circuit breaker may determine an appropriate time for maintenance and repair by monitoring in real time a contact wear amount using a photosensor. Moreover, the contact monitoring device for a vacuum circuit breaker, by using two photosensors, minimizes position errors with respect to the photosensors or a push rod that may be present inherently in the sensors or occur due to an installation state, and thus, may detect the contact wear amount with precision.