On-load tap changer

A load selector comprising:

• a load changeover switch insert with a switching tube rotatable about an axis;
• at least one switching segment fastened to the switching tube,
• at least two vacuum interrupters in the at least one switching segment, each vacuum interrupter a switching tube in turn having an axially movable contact that cooperates at its free end with an actuating lever, the vacuum interrupters being so arranged such that the movable contacts of the at least two vacuum interrupters are movable with respect to the axis alternately in opposite directions,
• at least one actuating element for actuating the actuating lever associated with each switching segment and is mounted on an inner wall of an oil tank, and
• at least one upper control cam and lower control cam for mechanical actuation of the actuation levers of the vacuum interrupters formed in the actuating element, the actuating levers being in the switching segment oppositely and alternately in correspondence with the free ends of the movable contacts of the vacuum interrupter.

A load selector with first, second and third phases, the load selector comprising:

• a load changeover switch insert with a switching tube rotatable about an axis,
• at least one switching segment fastened to the switching tube, and
• at least two vacuum interrupters in the at least one switching segment, each vacuum interrupter a switching tube in turn having an axially movable contact that cooperates at its free end with an actuating lever, the vacuum interrupters being so arranged that the movable contacts of the at least two vacuum interrupters are movable with respect to the axis alternately in opposite directions, wherein
• at least one switching segment and at least one actuating element are associated with each phase,
• in the first phase, a diverter/guide ring at an inner surface of the respective actuating element is an electrically conductive diverter contact,
• in the second and third phases, the diverter/guide ring at the inner surface of the respective actuating element is secured by a plurality of mounting elements at the respective actuating element, and
• in all three phases, an electrical terminal element of the respective tap contact extends through a respective screening cap to the outer wall of the oil tank and is mounted by a mounting element at the inner surface of the respective actuating element.