| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switching device in which an installation space can be reduced and an operation during energized is stable. <P>SOLUTION: The switching device includes: a first side intermediate conductive contact (111); a second side intermediate conductive contact (211); a first side external conductive contact (112); and a second side external conductive contact (212). In the intermediate conductive contacts (111) and (211) and the external conductive contacts (112) and (212), a time difference is generated in contact and separation when energization is performed and energization is stopped, respectively. When energization is performed, the intermediate conductive contacts (111) and (211) having relatively higher arc erosion resistance are firstly brought into contact to be subjected to arc, and then the external conductive contacts (112) and (212) having relatively lower electric resistance and relatively favorable conductive characteristics are brought into contact. When energization is stopped, the external conductive contacts (112) and (212) are firstly separated and then the intermediate conductive contacts (111) and (211) are separated to be subjected to arc in current interruption. <P>COPYRIGHT: (C)2012,JPO&INPIT |
