| 摘要 |
PROBLEM TO BE SOLVED: To provide a tracking corresponding breaker, of which the test button of a test circuit is easy to operate. SOLUTION: Connection terminals 15a and 15b are formed in the both ends of longer direction of a breaker case 14. A printed circuit board 16, which is mounted with the test circuit, is arranged in the lower side of the one side connection terminal 15a. A trip coil 8 is arranged in the lower side of the another side connection terminal 15b. A current transformer 2 is arranged between the printed circuit board 16 and the trip coil 8. A toggle linkage mechanism part 18 interlocked with the handle 17 projected form the upper surface of the breaker case 14 between the one side connection terminal 15a and the other side connection terminal 15b, is arranged. An opening-and-closing point-of- contact 9 is arranged between the toggle linkage mechanism part 18 and the one side connection terminal 15a. A bimetal 19 is arranged between the toggle linkage mechanism part 18 and the other side connection terminal 15b. And, the test button 10 is arranged so that it may project in the handle operation surface of the breaker case 14.
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