Monolithic Power Connection Blocks for Compact Switchgear Insulation
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Solution Overview
Problem
Current electric switchgears face challenges in maintaining effective dielectric insulation when compacted, leading to potential electric discharges and arcs, which can damage components and pose safety risks, while also being costly to manufacture at industrial scales.
Innovation Solution
The design incorporates power connection blocks with a monolithic structure formed by co-molded line contacts and insulating casings, which provide enhanced dielectric insulation without the need for mechanical connections, allowing for a compact size without compromising insulation levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the switchgear is compacted to reduce size, then installation space is optimized, but dielectric insulation performance deteriorates leading to electric discharges and arcs
Solution Approach 1:
The patent uses composite insulating materials with different dielectric properties in layered structures. The insulating casing incorporates materials selected for their specific dielectric strength and loss characteristics, creating a composite structure that achieves superior insulation performance in reduced space compared to homogeneous materials.
Solution Approach 2:
The insulating casing features non-uniform wall thickness and localized reinforcement zones positioned at critical areas where electric field stress is highest. This local quality enhancement provides targeted dielectric strength exactly where needed, optimizing insulation performance without uniformly increasing overall dimensions.
2Ease of manufacture
If traditional separate component assembly is used for power connection blocks, then manufacturing flexibility is maintained, but manufacturing complexity and costs increase
Solution Approach 1:
The patent combines multiple previously separate components (insulating casing, line contact, disconnection contact, and positioning elements) into a single integrated power connection block manufactured via injection molding. This merging eliminates assembly steps, reduces part count, and simplifies manufacturing while maintaining functional performance.
Solution Approach 2:
The integrated power connection block design incorporates multiple functions within a single component: electrical connection, mechanical positioning, dielectric insulation, and structural support. This multi-functionality reduces the number of separate parts needed and simplifies both manufacturing and assembly processes.
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 solution effectively prevents electric discharges and arcs, ensures safe operation, and allows for cost-effective manufacturing of compact switchgears with maintained dielectric insulation levels, enhancing safety and operational efficiency.
Implementation Method 1
one or more power connection blocks, each comprising a line contact, a disconnection contact and an insulating casing enclosing said line contact and said disconnection contact
Data Source
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AI summary
An electric switchgear (1) for low-voltage or medium-voltage applications comprising a cabinet (2), a withdrawable switching apparatus (4) and a shutter assembly (5) movable along a reference plane of motion. The electric switchgear comprises one or more power connection blocks (7, 8) comprising a line contact (70, 80), a disconnection contact (71, 81) and an insulating casing (72, 82). According to the invention, at least said line contact and said insulating casing form a monolithic structure.