Isolating bus enclosure arrangements for switchgear

A switchgear assembly comprising

• a plurality of gas insulated switches in respective first and second rows;
• a bus containment structure comprising first and second rows of enclosures configured to receive ambient air from outside of the enclosures and arranged in parallel such that each enclosure in the first row of enclosures is separated from an adjacent enclosure in the second row of enclosures by an air gap;
• a first bus assembly providing a first phase of a multiphase service, comprising interconnected bus sections comprising an inner conductor covered by at least one insulation layer and at least one shield conductor, disposed in the first row of enclosures and exposed to the ambient air;
• and
• a second bus assembly providing a second phase of the multiphase service electrically isolated from the first phase, comprising interconnected bus sections covered by at least one insulation layer, disposed in the second row of enclosures and exposed to the ambient air, wherein the first and second bus assemblies each comprise bus sections comprising an inner conductor, an inner insulation layer surrounding the inner conductor, an outer shield conductor surrounding the inner insulation layer and the inner conductor, and an outer insulation layer surrounding the outer shield conductor, the inner insulation layer and the inner conductor.

A switchgear assembly comprising:

• a plurality of gas insulated switches arranged in first and second parallel rows;
• first and second tubular enclosures extending parallel to respective ones of the first and second rows of switches and configured to receive ambient air from outside of the enclosures;
• and
• first and second bus assemblies providing respective first and second phases of the same multiphase service electrically isolated from one another, each comprising interconnected bus sections comprising an inner conductor covered by at least one insulation layer and at least one shield conductor, the first and second bus assemblies disposed in respective ones of the first and second tubular enclosures and exposed to the ambient air therein, wherein each of the first and second bus assemblies comprises interconnected bus sections, each comprising an inner conductor, an inner insulation layer surrounding the inner conductor, an outer shield conductor surrounding the inner insulation layer and the inner conductor, and an outer insulation layer surrounding the outer shield conductor, the inner insulation layer and the inner conductor.