Medium voltage breaker conductor with an electrically efficient contour

A vacuum circuit breaker comprising:

• a low voltage portion, and high voltage portion;
• said low voltage portion including an operating mechanism;
• said low voltage portion operatively coupled to said high voltage portion;
• said high voltage portion including a conductor assembly and a vacuum interrupter assembly;
• said conductor assembly including a first terminal, a primary first conductor, a primary second conductor, and a second terminal;
• said vacuum interrupter assembly including a first stem assembly, a first contact, a second contact, a second stem assembly, and a vacuum housing;
• said first contact coupled to, and in electrical communication with, said first stem assembly;
• said first stem assembly coupled to, and in electrical communication with, said first conductor;
• said second contact coupled to, and in electrical communication with, said second stem assembly;
• said second stem assembly coupled to, and in electrical communication with, said second conductor;
• said first contact disposed in said vacuum housing;
• said second contact movably disposed in said vacuum housing;
• said operating mechanism operatively coupled to said second contact, wherein said second contact is structured to move between a first position, wherein said second contact assembly contact member is not directly coupled to said first contact assembly contact member, and a second position, wherein said second contact assembly contact member is coupled to, and in electrical communication with, said first contact assembly contact member;
• wherein one of said primary first conductor or said primary second conductor includes a body;
• said body includes a transfer portion and a coupling portion;
• wherein said body transfer portion has an electrically efficient contour;
• said body transfer portion is substantially cylindrical;
• said body coupling portion includes a number of generally planar members defining an enclosed space;
• and
• said body coupling portion planar members including rounded edges.