| 摘要 |
<p>The invention relates to a contact system for a tap changer. The system includes a fixed contact part (1) having a first contact surface (4), and a movable contact part (2) having a second contact surface. The movable contact part (1) is movable from an electrical non-contact position to an electrical contact position and vice versa. The direction of movement is substantially parallel to the first contact surface (4). Force applying means (F) is arranged to urge said contact surfaces towards each other. According to the invention one of said contact parts includes a wheel means (3) arranged to roll against an abutment surface (6,) of the other contact part during an entering phase of the movement from the electrical non-contact position to the electrical contact position. The rolling contact is a sole and singular contact between the contact parts (1, 2,) during the entering phase</p> |
