km2上端头是并在km1的上端头的，假设流过km1电流10A，流过km2电流5A，那么km1上端头电流是不是15A，也就是说km1上端头是15A，下端头是10A，那么km1选型时就不能只根据电机电流10A来选接触器了吧，望指正。