A medium voltage or high voltage circuit breaker; comprising: - a first terminal; - a second terminal; - a first vacuum interrupter; - a second vacuum interrupter; - an interconnection part; - an actuator; - an operating rod; and - a lever system; wherein the first terminal is electrically connected to a fixed contact of the first vacuum interrupter, and wherein the second terminal is electrically connected to a fixed contact of the second vacuum interrupter; wherein the interconnection part is configured to be in electrical connection with a movable contact of the first vacuum interrupter and the interconnection part is configured to be in electrical connection with a movable contact of the second vacuum interrupter, and wherein the interconnection part is configured to provide a current path between the movable contacts; wherein a first end of a first non-linear lever arm of the lever system is coupled to a pushrod of the 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 centre pivot point; wherein a first end of a second non-linear lever arm of the lever system is coupled to a pushrod of the 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 centre pivot point; wherein a part at the first end of the first non-linear lever arm is supported by the interconnection part and can slide linearly within a slot of the interconnection part or a part at the first end of the first non-linear lever arm is supported by the interconnection part and can move linearly with respect to a bearing of the interconnection part; wherein a part at the first end of the second non-linear lever arm is supported by the interconnection part and can slide linearly within a slot of the interconnection part or a part at the first end of the second non-linear lever arm is supported by the interconnection part and can move linearly with respect to a bearing of the interconnection part; and wherein in a transition from an open state to the closed state the actuator is configured to move the operating rod 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 part at the first end of the first non-linear lever arm and the part at the first end of the second non-linear lever arm move simultaneously within their corresponding slots away from one another or with respect to their corresponding bearings away from one another. - a first terminal; - a second terminal; - a first vacuum interrupter; - a second vacuum interrupter; - an interconnection part; - an actuator; - an operating rod; and - a lever system; wherein the first terminal is electrically connected to a fixed contact of the first vacuum interrupter, and wherein the second terminal is electrically connected to a fixed contact of the second vacuum interrupter; wherein the interconnection part is configured to be in electrical connection with a movable contact of the first vacuum interrupter and the interconnection part is configured to be in electrical connection with a movable contact of the second vacuum interrupter, and wherein the interconnection part is configured to provide a current path between the movable contacts; wherein a first end of a first non-linear lever arm of the lever system is coupled to a pushrod of the 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 centre pivot point; wherein a first end of a second non-linear lever arm of the lever system is coupled to a pushrod of the 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 centre pivot point; wherein a part at the first end of the first non-linear lever arm is supported by the interconnection part and can slide linearly within a slot of the interconnection part or a part at the first end of the first non-linear lever arm is supported by the interconnection part and can move linearly with respect to a bearing of the interconnection part; wherein a part at the first end of the second non-linear lever arm is supported by the interconnection part and can slide linearly within a slot of the interconnection part or a part at the first end of the second non-linear lever arm is supported by the interconnection part and can move linearly with respect to a bearing of the interconnection part; and wherein in a transition from an open state to the closed state the actuator is configured to move the operating rod 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 part at the first end of the first non-linear lever arm and the part at the first end of the second non-linear lever arm move simultaneously within their corresponding slots away from one another or with respect to their corresponding bearings away from one another.