| 摘要 |
PROBLEM TO BE SOLVED: To provide a distribution board and radiation elements used in it which can discharge heat generated in a neighborhood of a breaker and stabilize tripping characteristics of the breaker. SOLUTION: A board, with which a first frame 40 having a main switch 31 on its front side and a second frame 50, having a plug-in type branch switch 32 on its front side, are connected with each other, is housed in a box 1. The box 1 comprises a box part 10, whose front surface is opened and a cover 20 attached to the front surface of the box part 10. An open window 13 is formed at the center of the rear plate 11 of the box part 10. A radiation block 110 attached to the rear plate 11 of the box part 10 is provided on the rear side of the second frame 50, so as to be pressed against the rear surface of the second frame 50. The radiation block 110 comprises a plurality of radiation elements 111 piled up in its thickness direction. |
