A high voltage air disconnect switch having an electrical load interrupter unit responsive to the opening of the high voltage air break disconnect switch. The electrical load interrupter unit including an actuating arm is contacted, during the opening of the switch, by a moving arc horn attached to and in electrical circuit with a switch blade of the high voltage air disconnect switch. The moving arc horn has operatively attached a spring catch which engages the actuating arm with a physical holding force applied to an electric contact point between the actuating arm and the moving arc horn to firmly capture the interrupter actuating arm against the moving arc horn during opening of the switch to prevent any arc burning damage due to arcing between the actuating arm and the moving arc horn as the switch opens.

A high voltage air disconnect switch having an electrical load interrupter unit responsive to the opening of the high voltage air break disconnect switch. The electrical load interrupter unit including an actuating arm is contacted, during the opening of the switch, by a moving arc horn attached to and in electrical circuit with a switch blade of the high voltage air disconnect switch. The moving arc horn has operatively attached a spring catch which engages the actuating arm with a physical holding force applied to an electric contact point between the actuating arm and the moving arc horn to firmly capture the interrupter actuating arm against the moving arc horn during opening of the switch to prevent any arc burning damage due to arcing between the actuating arm and the moving arc horn as the switch opens.

An electric current switch includes first and second fixed electrical contacts electrically connected; a movable single side electrical contact configured to make single side connection to and disconnect from the first fixed electrical contact for making and breaking electrical current in the electric current switch; and a movable second electrical contact configured to move in contact with the second fixed electrical contact subsequent to the making of current and to disconnect from the second fixed electrical contact before the breaking of electric current. An electrical connection between the movable second electrical contact and the second fixed electrical contact is by a double side contact connecting in a slot.

A mobile contact (20) is provided for an electric current switching device (50), comprising: a first conductor blade (1) and a second conductor blade (2), extending in planes (P1, P2) parallel to each other and distant from each other, the conductor blades (1, 2) being linked in rotation about a common rotational axis (R), a first and a second spacer (3, 4) configured to maintain a minimum distance between the first blade (1) and the second blade (2), in which a cross section (S1, S2) of each blade (1, 2) is shaped so as to: have an area equal to the area of a reference cross section (S1, S2) of rectangular shape and of the same length (a), and have a quadratic moment greater than the quadratic moment of the reference cross section (S1, S2), the quadratic moment being determined in relation to an axis parallel to the transverse axis (T1, T2) of the blades (1, 2).