| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a test plug which can check the active status of a track and can easily connect to a test device. <P>SOLUTION: The test plug includes: a fixed side plug unit 10 with a plug part 18 projected forward; a movable side plug unit 40 assembled on a back face of the fixed side plug unit so as to reciprocate along the prescribed movement locus; and a detection circuit for detecting the active status of a protective relay. When a movable-side support 42 is located at a first position, a first and a second fixed side contacts (20 and 22) and a first and a second movable side contacts are in the nonconductive state, and the first and the second fixed side contacts and a first and a second detection circuit side contacts are in the conductive state. When the movable-side support is located at a second position, the first and the second fixed side contacts and the first and the second movable side contacts are in the conductive state, and the first and the second fixed side contacts and the first and the second detection circuit side contacts are in the nonconductive state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
