Gas-Insulated Switchgear Lateral Circuit Breaker Arrangement
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Solution Overview
Problem
Existing gas-insulated switchgear configurations face challenges in downsizing, leading to poor maintenance working properties and increased transportation costs due to limited height reduction and obstructive main bus placement, which complicates maintenance and on-site installation.
Innovation Solution
The gas-insulated switchgear features a laterally arranged circuit breaker with an operating mechanism and link mechanism, along with sufficient working spaces above the sealed tank and operating mechanism, allowing for easier maintenance and reduced height, while the main bus is positioned orthogonally to the circuit breaker to minimize obstruction during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the circuit breaker is vertically arranged to reduce installation area, then the height of the gas-insulated switchgear increases, but the maintenance working property deteriorates and heavy equipment is required for maintenance
Solution Approach 1:
The patent changes the arrangement dimension of the circuit breaker from vertical to horizontal. The circuit breaker is laterally arranged in the longitudinal direction and fixed to a frame, transforming the spatial configuration from height-directional occupation to length-directional occupation. This dimensional change reduces the overall height of the gas-insulated switchgear while improving maintenance accessibility, as workers can approach the horizontally arranged breaker from the side rather than needing to work in confined vertical spaces below the breaker
2Length of stationary object
If the operating mechanism is provided immediately below the circuit breaker to save space, then the height is reduced, but the maintenance of the circuit breaker and operating mechanism requires removal of these devices and heavy equipment
Solution Approach 1:
The patent provides separate working spaces for the circuit breaker and operating mechanism. The breaker section-side working space is provided above the sealed tank, and the operating mechanism-side working space is provided above the operating mechanism. This segmentation allows independent access to each component for maintenance without requiring removal of other components, eliminating the need for heavy equipment and improving maintenance efficiency
3Length of stationary object
If the main bus is doubly provided above the operating mechanism to reduce height, then the height is reduced, but the maintenance operation becomes complex and working property deteriorates
Solution Approach 1:
The patent extracts the main bus from the confined space above the operating mechanism and positions it laterally. The main bus is connected approximately orthogonally to the axial direction of the circuit breaker via a disconnector, removing it from the vertical stacking arrangement. This extraction eliminates the need for complex maintenance operations around overhead buses and provides clear access to the operating mechanism, improving both height reduction and maintenance working property
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces the overall height of the switchgear, improving maintenance accessibility and reducing transportation costs by allowing the entire system to be accommodated in a delivery container without disassembly, and enhances on-site installation efficiency.
Implementation Method 1
an operating mechanism using an elastic body as a driving source to drive the movable contact
Data Source
AI summary
A circuit breaker (33) formed with a sealed tank (4) having a breaker section and an operating mechanism (2) is laterally arranged in a lengthwise direction and is fixed to a frame (1), and above the circuit breaker, main bus containers (11, 12) are provided, substantially orthogonally to an axial direction of the circuit breaker (33). Operating mechanism-side working space (B) and breaker section-side working space (C) are provided respectively above the operating mechanism (2) and the sealed tank (4), and a hand hole (5) is provided on an upper surface of the sealed tank (4). A connecting pin (24) is provided in a link mechanism connecting the operating mechanism (2) and the movable contact (7), and an operating mechanism-side working hole for accessibility to the connecting pin (24) from the operating mechanism-side working space (B) is provided.