Medium voltage circuit breaker arrangement operated by a transmission mechanism

1. A circuit breaker arrangement comprising:

at least one pole part configured to switch an electrical medium to high voltage circuit by a respective pair of a fixed electrical contact and a movable electrical contact;

at least one pushrod configured to move a corresponding movable electrical contact of the at least one of pole part, respectively;

a common actuator unit configured to operate each pushrod; and

a transmission means for transferring a switching force from the actuator unit to each pushrod, the transmission means mechanically connecting the actuator unit to each pushrod,

wherein the transmission means includes a crankshaft having at least one crank and at least one connection rod, the at least one crank being pivotally attached to a first end of a corresponding one of the at least one connection rod,

wherein a second end of the corresponding one of the at least one connection rod opposite to the first end is pivotally attached to an end of a corresponding one of the at least one pushrod of a corresponding one of the at least one pole part to move the corresponding pushrod,

wherein three pole parts are arranged in parallel one to another in a line formation corresponding with the crankshaft of the transmission means, and

wherein the crankshaft is common to each pole part.

2. The circuit breaker arrangement according to claim 1 , wherein all pole parts are arranged one to another in a line formation.

3. The circuit breaker arrangement according to claim 2 , wherein a common upward position of all cranks of the crankshaft in the direction of neighbouring pole parts causes a closed electrical switching position of all pole parts.

4. The circuit breaker arrangement according to claim 2 , wherein the closed electrical switching position is realized by a torsion angle of 180° of the crankshaft from the closed electrical switching position.

5. The circuit breaker arrangement according to claim 1 , wherein the common actuator unit is configured to generate a rotary motion for pivotally operating the crankshaft.

6. The circuit breaker arrangement according to claim 1 , wherein the crankshaft rotates in the same direction for changing an electrical switching position between an open position and a closed position.

7. Circuit breaker arrangement according to claim 1 , comprising:

a rotating mass arranged on the crankshaft.

8. The circuit breaker arrangement according to claim 7 , wherein the rotating mass is positioned at one of end of the crankshaft.

9. The circuit breaker arrangement according to claim 1 , wherein the common actuator unit is positioned at one of end of the crankshaft.

10. The circuit breaker arrangement according to claim 1 , wherein the connection rod includes two symmetrically shaped parts,

wherein each part has a first semicircle opening for pivotally attaching to the crank and a second semicircle opening for pivotally attaching to the pushrod.

11. The circuit breaker arrangement according to claim 10 , wherein both parts of the connection rod are assembled by at least one transverse screw connection.

12. The circuit breaker arrangement according to claim 10 , wherein both parts of the connection rod are assembled by a surrounding tensible belt.

13. The circuit breaker arrangement according to claim 1 , comprising:

a housing; and

a plurality of bearing disks for pivot-mounting the crankshaft inside the housing.

14. The circuit breaker arrangement according to claim 13 , wherein the housing supports the pole parts mounted in line on a common outer mounting surface.

15. The circuit breaker arrangement according to claim 7 , comprising:

a plurality of pole parts,

wherein the rotating mass is positioned between two of the pole parts.

16. The circuit breaker arrangement according to claim 1 , comprising:

a plurality of pole parts,

wherein the common actuator unit is arranged between two of the pole parts.