Gas-Insulated Switchgear Compact Layout via Vertical Bus Bar Nesting
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Solution Overview
Problem
The existing gas-insulated switchgear designs, such as those described in Patent Literature 1, face challenges in reducing the installation area due to the arrangement of bus bars, which increases the longitudinal length of the circuit breaker and subsequently the installation space required.
Innovation Solution
The proposed gas-insulated switchgear configuration includes a circuit breaker with branch outlets on its side surface, a connection bus bar extending upward, disconnect switches connected to these outlets, a main bus bar arranged coaxially with the second branch outlet, and an abutment supporting the main bus bar from below, allowing for a more compact layout by reducing the distance between branch outlets and simplifying the attachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bus bar is arranged between the two branch outlets, then the connection between branch outlets is achieved, but the circuit breaker becomes longer in the longitudinal direction by the width of a bus bar tank
Solution Approach 1:
The patent transitions the bus bar arrangement from a horizontal layout (between branch outlets) to a vertical layout (above the second branch outlet). This dimensional change allows the bus bar to connect branch outlets without increasing the longitudinal length of the circuit breaker, as the connection is achieved through vertical stacking rather than horizontal extension.
Solution Approach 2:
The patent positions the bus bar vertically above the second branch outlet, nesting the connection structure within the existing circuit breaker footprint. The bus bar tank is arranged coaxially with the second branch outlet, allowing the connection components to be nested vertically rather than extending horizontally, thus reducing the overall longitudinal dimension.
2Ease of manufacture
If the bus bar is arranged between the two branch outlets, then the connection is established, but the installation area of the gas-insulated switchgear becomes larger
Solution Approach 1:
By changing the bus bar arrangement from horizontal to vertical orientation, the patent reduces the horizontal footprint required for installation. The vertical arrangement above the second branch outlet allows the same electrical connection function to be achieved with a smaller installation area, as the connection path extends in the vertical dimension rather than consuming horizontal space.
Solution Approach 2:
The patent concentrates the bus bar connection structure at a specific location (coaxially above the second branch outlet) rather than distributing it horizontally between both branch outlets. This localized vertical arrangement optimizes the use of space, reducing the overall installation area while maintaining the necessary electrical connections.
Data Source
AI summary
A gas-insulated switchgear includes: a circuit breaker; a connection bus bar; a first disconnect switch; a second disconnect switch; a line bus bar; a main bus bar; and an abutment. The circuit breaker includes first and second branch outlets provided on a side surface of a cylindrical circuit breaker tank. The connection bus bar has one end connected to the first branch outlet. The first disconnect switch is connected to the other end of the connection bus bar. The second disconnect switch is connected to the second branch outlet. The line bus bar is led out from the second disconnect switch in a horizontal direction. The main bus bar is arranged above the second disconnect switch coaxially with the second branch outlet. The abutment is fixed to a top portion of the second disconnect switch and supports the main bus bar from below.