Gas insulated bus

A gas insulated bus comprising:

• a first cylinder-shaped metallic container filled with an insulating gas and an axis line of whose main body extends in a first direction;
• a first main circuit conductor provided extending parallel to the first direction in the first metallic container and the outline of whose cross-section is circular;
• a second cylinder-shaped metallic container filled with the insulating gas and an axis line of whose main body extends in a second direction crossing the first direction, an end of the second metallic container being connected with an end of the first metallic container;
• a second main circuit conductor provided extending parallel to the second direction in the second metallic container and electrically connected to the first main circuit conductor inside the end of the first metallic container and the outline of whose cross-section is circular;
• an insulating spacer of a single-leg structure provided inside the end of the first metallic container and whose one end is fixed to the first metallic container and an other end of which is indirectly attached to a connection portion of the first main circuit conductor and the second main circuit conductor, the insulating spacer supporting and insulating the connection portion inside the first metallic container;
• and
• a metal-made shield attached to the other end of the insulating spacer and provided with a first opening proximate the first main circuit conductor and open in the first direction, and provided with a second opening proximate the second main circuit conductor and open in the second direction, the shield covering the connection portion, the shield being substantially in a barrel or spindle shape having an outside diameter greater than the outside diameter of the first main circuit conductor and the second main circuit conductor, wherein
• the end of the first metallic container is provided with a main-circuit branch tube to be connected with the end of the second metallic container, and
• an axis line of the main-circuit branch tube is substantially parallel to the second direction, wherein a direction of the axis line of the main-circuit branch tube is substantially orthogonal to the first direction, and wherein
• a recess is formed in part of the outer surface of the shield,
• a bottom of the recess is provided on the axis line of the main body extending in the first direction,
• the insulating spacer is provided on the axis line of the main body extending in the first direction,
• an embedded electrode on the metallic container side is embedded in the one end of the insulating spacer, and
• at least part of the embedded electrode on the metallic container side is placed outside an area defined by the inside diameter of the main-circuit branch tube in a plan view viewed in the second direction.