| 摘要 |
PURPOSE: An electromagnetic device capable of a line test is provided to lengthen the life span of a breaker by performing an opening operation before the flow of fault currents by performing a quick break when a transmission line is occurred abnormally. CONSTITUTION: A housing(110) has a fixed length in the vertical direction. A line break operation unit(112) includes a coil part(150a) and a movable element(200). The coil part is installed in the housing and moves in the upper or lower direction according to the direction of the current in a magnetic field area. The movable element is connected to the coil part through a link part and moves according to the operation of the coil part. A line confirmation operation unit(113) also includes a coil part(150b) and a movable element(210). In case the line break operation unit operates in an open state, the line break operation unit is opened again by determining whether an abnormal occurrence continues or not. |
