公开(公告)号：EP3200213A4

公开(公告)日：2018-06-13

申请号：EP15844233

申请日：2015-06-05

申请人： MITSUBISHI ELECTRIC CORP

发明人： HORINOUCHI KATSUHIKO ,  SATO MOTOHIRO ,  TAKAHASHI KAZUKI ,  KAMIMAE RYO ,  TOKOYODA SHO

IPC分类号： H01H33/59

CPC分类号： H02H3/087 ,  H01H9/54 ,  H01H33/59 ,  H01H33/596 ,  H01H33/6661 ,  H01H77/02

摘要： A DC circuit breaker includes: a mechanical switch (2) provided on an electrical path (1) through which a direct current flows; and a semiconductor switch (20) connected in parallel with the mechanical switch (2). The mechanical switch (2) includes a gas disconnector (3) and a vacuum circuit breaker (4) connected in series. Normally, the direct current flows through the mechanical switch (2). When interrupting the direct current, the vacuum circuit breaker (4) is made nonconductive to allow the direct current to be commutated to the semiconductor switch (20), and subsequently the gas disconnector (3) and the semiconductor switch (20) are made nonconductive. A vacuum circuit breaker (4) having a low withstand voltage can be used.