| 摘要 |
PURPOSE:To make an attachment mountable to every pole as well as to aim at improvement in reliability by installing an attachment mounting part in a position being adjoined to at least either side of a tripping mechanism and an overcurrent detecting means on an outer surface of a box body. CONSTITUTION:A recess 21 as an attachment mounting part is installed in the upper part of an overcurrent detector 11 on an outer surface part of a case 21, and an attachment 50 is attached to the inside. The detector 11 and a tripping mechanism 40 tripping on-off linkage 9 by its operation are situated at the load side of a circuit breaker, and they are operable with slight force. When a voltage tripper(SHT) is attached as an attachment, a breaker is tripped by voltage from the outside. With this constitution, it will get off with small operating force, and the tripper(SHT) is thus miniaturized. Since an upper part of the detector 11 is separated from a contact part, the influence of a breaking impact is little. |
