| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vacuum circuit breaker whose manufacture is facilitated by integrally molding components of a main circuit from an epoxy mold, while preventing assembly errors, securing an insulation distance between a distribution board and a circuit as the main circuit is arranged in symmetry with respect to the drive unit, and easily achieving right or left alignment depending on the installation atmosphere of the distribution board. <P>SOLUTION: The main circuit unit 120 of the vacuum circuit breaker includes a housing 121 accommodating a vacuum interrupter 122; a first conductor 123 electrically connected to the vacuum interrupter 122 and electrically connected to a bus bar of the distribution board; and an insulation rod 124 coupled at each end to the vacuum interrupter 122 and a frame unit 130 to actuate the vacuum interrupter 122 by use of a driving force via the frame unit 130. The housing 121 is integrally molded and coupled with the vacuum interrupter 122 to form a sealed portion 121a. A space 121b opened at its lower end is formed at the lower end of the sealed portion 121a such that the insulation rod 124 is movably enclosed therein. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
