Bus bar unit and dynamo-electric machine

A bus bar unit, comprising:

• an annular insulation block which is constituted by an electrical insulation material and has an axial center parallel to a first axis;
• a first bus bar including
• a circular arc-shaped, first main body portion disposed inside the insulation block, and
• a first connection terminal configured to be connectable to a first coil end, including a plurality of terminal portions, and radially projecting from the insulation block;
• a second bus bar including
• a circular arc-shaped, second main body portion disposed inside the insulation block, and
• a second connection terminal configured to be connectable to a second coil end, including a plurality of terminal portions, and radially projecting from the insulation block, the second main body portion being disposed away from the first main body portion in the first axis direction;
• a third bus bar including
• a circular arc-shaped, third main body portion disposed inside the insulation block, and
• a third connection terminal configured to be connectable to the third coil end, including a plurality of terminal portions, and radially projecting from the insulation block, the third main body portion being disposed radially away from the first main body portion, the third connection terminal including at least one terminal portion that passes between the first main body portion and the second main body portion;
• and
• a fourth bus bar including
• a circular arc-shaped, fourth main body portion disposed inside the insulation block, and
• a fourth connection terminal configured to be connectable to a fourth coil end, including a plurality of terminal portions, and radially projecting from the insulation block, the fourth main body portion being disposed away from the third main body portion in the first axis direction, the fourth connection terminal including at least one terminal portion that passes between the first main body portion and the second main body portion.