Medium voltage or high voltage circuit breaker

A drive for a medium voltage or high voltage circuit breaker, wherein the circuit breaker comprises:

• a first terminal,
• a second terminal,
• a first vacuum interrupter, and
• a second vacuum interrupter,
• wherein the first terminal is electrically connected to a first fixed contact of the first vacuum interrupter, wherein the second terminal is electrically connected to a second fixed contact of the second vacuum interrupter;
• and
• wherein the drive comprises:
• an interconnection part;
• an actuator;
• an operating rod;
• and
• a lever system;
• wherein the interconnection part is configured to be in electrical connection with a first movable contact of the first vacuum interrupter and the interconnection part is configured to be in electrical connection with a second movable contact of the second vacuum interrupter, and wherein the interconnection part is configured to provide a current path between the first and second movable contacts;
• wherein a first end of a first non-linear lever arm of the lever system is configured to couple to a pushrod of the first movable contact of the first vacuum interrupter at a first lever arm first end pivot point, and wherein a second end of the first lever arm is coupled to the operating rod at a center pivot point, and a length (a) of a first arm part of the first non-linear lever arm between the first end coupled to the pushrod of the first moveable contact and a connection to a second arm part is less than a length (b) of the second arm part between the connection to the first arm part and the second end of the first lever arm coupled to the center pivot point;
• wherein a first end of a second non-linear lever arm of the lever system is configured to couple to a pushrod of the second movable contact of the second vacuum interrupter at a second lever arm first end pivot point, and wherein a second end of the second lever arm is coupled to the operating rod at the center pivot point, and a length (a) of a first arm part of the second non-linear lever arm between the first end coupled to the pushrod of the second moveable contact and a connection to a second arm part is less than a length (b) of the second arm part between the connection to the first arm part and the second end of the second lever arm coupled to the center pivot point;
• wherein a first sliding part at the first end of the first non-linear lever arm is supported by the interconnection part and can slide linearly within a first sliding support of the interconnection part;
• wherein a second sliding part at the first end of the second non-linear lever arm is supported by the interconnection part and can slide linearly within a second sliding support of the interconnection part;
• wherein in a first transition the actuator is configured to move the operating rod in a first direction to move the second end of the first lever arm and the second end of the second lever arm such that the first sliding part at the first end of the first lever arm and the second sliding part at the first end of the second lever arm move simultaneously within the first and second sliding supports respectively away from one another;
• and
• wherein in a second transition the actuator is configured to move the operating rod in a second direction opposite to the first direction to move the second end of the first non-linear lever arm and the second end of the second non-linear lever arm such that the first sliding part at the first end of the first non-linear lever arm and the second sliding part at the first end of the second non-linear lever arm move simultaneously within the first and second sliding supports respectively towards one another.