| 摘要 |
The switching blade of the isolator whitch can pivot on the respective counter contact about its longitudinal axis, in order to change the contact force. The blade has at its pivotal end a lever arm, extending radially to the blade long axis and connected in non-rotary manner to the blade. The lever arm is hinged to a link mounted on a drive crank. In the ON position the lever arm is inclined in relation to the blade swivelling plane, as in 1765485. The counter contact (3) has in the run-up region for the blade (1, 2) opposite protrusions (18, 19) the run-up region being located in front of the contact surfaces. The spacing of the protrusions is greater than the blade width before it reaches its final position, but smaller than the same in the final position. |
