Compact Gas Insulated Switchgear with Orthogonal Cable Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gas insulated switchgear configurations are too large to fit in small facilities, such as tunnels, leading to increased construction costs due to their size and height, which is disproportionate to the facility dimensions.
Innovation Solution
The configuration of the gas insulated switchgear is optimized by arranging the control compartment between the operating mechanism and cable compartments, allowing for orthogonal cable connections and utilizing space efficiently, thereby reducing the overall size and height of the switchgear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cable connection places are arranged at both front and back sides of the switchgear, then cable connection flexibility is improved, but the depth dimension of the switchgear increases
Solution Approach 1:
The patent transitions from arranging cable connections only in the depth direction (front and back) to utilizing both depth and width dimensions. By providing cable connection places at the front side and lateral sides of the switchgear, it creates a three-dimensional cable access configuration that reduces the required depth while maintaining connection flexibility.
2Adaptability or versatility
If multiple cable connections are stacked in the height direction, then cable connection capacity is improved, but the height of the switchgear increases
Solution Approach 1:
Instead of stacking cable connections vertically in the height direction, the patent distributes them across multiple lateral sides in the horizontal plane. This dimensional redistribution allows multiple cables to be connected without increasing the switchgear height, making it suitable for installations with height constraints.
3Area of stationary object
If the switchgear size is reduced to fit small facilities, then installation area is reduced, but insulation distance may be compromised
Solution Approach 1:
The patent uses spatial redistribution in multiple dimensions to reduce the overall footprint while preserving critical insulation distances. By arranging cable connection places at front and lateral sides rather than stacking them, it creates more uniform space utilization that maintains necessary electrical clearances throughout the compact structure.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a switchgear in which cables are used on both of the input side and the output side for connection between a main circuit and an external main circuit in a switchgear, a circuit breaker (1) and connection conductors (29, 31) of the switchgear are stored in a box-shaped pressure tank (2) together with insulating gas; an operating mechanism (3) that performs opening and closing operation of the circuit breaker (1) and a first cable connection portion (13) that is connected to the connection conductors (29, 31) are attached to one face of the pressure tank; and a second cable connection portion (14) that is connected to the connection conductors (29, 31) is attached to the other face of the pressure tank (2), the other face being parallel with respect to a direction connecting the operating mechanism (3) and the circuit breaker (1).