Multipole circuit breaker with single-pole units

A low voltage multipole circuit breaker, comprising:

• a plurality of single-pole breaking units, each single-pole breaking unit comprising (a) a parallelepipedic box comprised of a molded plastic material, said box having two opposite large side faces, (b) two opposing stationary contacts housed within said box, said stationary contacts being spaced apart from each other, (c) a rotating contact bridge rotatable between a first position to be in contact with said stationary contacts and a second position to be separated from said stationary contacts, and (d) a rotating bar section which supports said contact bridge, said bar section extending transversely between said two opposite large side faces, said bar section comprising two opposite axial orifices extending therethrough, said axial orifices being eccentric to the axis of rotation of said rotating bar section;
• a molded case for housing said single-pole breaking units, said single-pole breaking units being arranged side by side in said molded case;
• two parallel connecting bars extending respectively through said two opposite axial orifices to interconnect adjacent single-pole breaking units;
• an operating mechanism onto one of said single-pole breaking units, said operating mechanism comprising two opposing metal flanges and a switch device disposed between said metal flanges and secured to a crank to drive said crank in rotation about a crank axis, said crank being pivotally mounted on said metal flanges and having two opposite arms respectively coupled to said two parallel connecting bars to simultaneously operate said single-pole breaking units by simultaneously rotating each contact bridge.