| 摘要 |
PURPOSE:To make it possible to discriminate the ON condition and the OFF condition of a circuit breaker precisely by installing the third permanent magnet to a handle, converting between the ON position and the OFF position of the handle to turn over the first permanent magnet with the second and the third permanent magnets, and displaying the ON and the OFF conditions of the circuit breaker through a window. CONSTITUTION:Since the magnetomotive force of the third permanent magnet 7 is larger than that of the second permanent magnet 6 at the handle position where the third permanent magnet 7 is close to the pole of the second permanent magnet 6 which is close to the third permanent magnet 7, the third permanent magnet 7 overpowers the second permanent magnet 6, absorbs one pole of the first permanent magnet 4, and displays one side either the ON or the OFF condition. When the third permanent magnet 7 is apart from one pole 601 of the second permanent magnet 6, the magnetomotive force of the third permanent magnet 7 cannot overpower that of the second permanent magnet 6 at the handle position, the first permanent magnet 4 is turned over by the function of the second permanent magnet 6, and the other side display of the ON and the OFF conditions is presented. As a result, since the display is presented by the first permanent magnet 4 positively, a precise discrimination can be obtained. |
