Selector for on-load tap changer

A selector for an on-load tap changer, the selector comprising:

• a tap selector comprising:
• selector contacts configured to be electrically connected to respective winding taps of a tap-changing transformer;
• a first selector arm, the first selector arm being rotatably mounted on a first shaft;
• and
• a first contact element arranged on the first selector arm and configured to selectively contact one of the selector contacts according to a rotational position of the first selector arm;
• a second selector arm, the second selector arm being rotably mounted to the first shaft and electrically connected to the first selector arm;
• a second contact element arranged on the second selector arm and configured to selectively contact one of the selector contacts according to a rotational position of the second selector arm;
• and
• a rocker arranged on the second selector arm;
• and
• a change-over selector configured to be actuated via the rocker of the tap selector, the change-over selector comprising:
• a change-over selector arm having a first end and a second end, the change-over selector arm being rotatably mounted on a second shaft at a pivot point between the first end and the second end;
• a plurality of change-over contacts comprising a common contact, a first contact configured to be electrically connected to an upper end of a main winding of the tap-changing transformer, and a second contact configured to be electrically connected to a lower end of the main winding of the tap changing transformer;
• and
• a moveable contact bridge configured to selectively connect a pair of the change-over contacts, the moveable contact bridge operatively coupled to the first end of the change-over selector arm such that a pivoting of the change-over selector arm moves the moveable contact bridge to connect a different pair of the change-over contacts,
• wherein the rocker of the tap selector is configured such that, in a condition where the second selector arm is rotating about the first shaft, the rocker mechanically engages the change-over selector arm to actuate the change-over selector.