Removable Dielectric Shed Sleeve for High Voltage Switch
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Solution Overview
Problem
Conventional high voltage switches face issues with voltage arcing and damage due to the lack of effective insulation between the switch poles and actuating mechanisms, leading to costly replacements and potential failures.
Innovation Solution
The design incorporates removable shed sleeves made of dielectric materials like silicone or EPDM elastomer, which form a dielectric interface with the housing, providing increased creep distance and allowing for easy replacement without damaging the underlying housing, thus preventing arcing and reducing maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional switches use an outer insulating shield with radially extending fins to increase creep and flashover distance, then voltage flashover prevention is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The insulating shield is divided into multiple removable shed sleeves that can be individually attached to the housing. Each sleeve acts as an independent segment providing creep distance, while the modular structure simplifies manufacturing and assembly compared to a single complex integrated shield.
Solution Approach 2:
The shed sleeves are made from flexible dielectric materials such as silicone rubber or EPDM elastomer. These flexible shells conform to the housing surface while providing the necessary insulation and creep distance, replacing rigid fin structures with adaptable thin-walled components.
2Reliability
If the entire switch housing is replaced when shed sleeves are damaged, then reliability is maintained, but loss of substance and manufacturing cost increase
Solution Approach 1:
The housing system is segmented into the permanent housing structure and removable shed sleeves. When sleeves are damaged, only the sleeves need replacement rather than the entire housing, reducing material waste and manufacturing costs while maintaining housing integrity and reliability.
Solution Approach 2:
The shed sleeves are designed as disposable or replaceable components that can be discarded when damaged or contaminated. The permanent housing structure is recovered and reused, eliminating the need to discard functional housing material and reducing overall resource consumption.
3Ease of repair
If shed sleeves are made removable for easy replacement, then ease of repair is improved, but connection reliability between sleeves and housing may worsen
Solution Approach 1:
The flexible dielectric material of the shed sleeves allows for simple snap-on or slide-on installation without complex fastening mechanisms. The material's elasticity ensures reliable electrical and mechanical connection to the housing while maintaining ease of removal and replacement for repair operations.
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 voltage flashover, allows for cost-effective maintenance by replacing only damaged shed sleeves, and reduces material waste from molding defects, enhancing the reliability and longevity of high voltage switches.
Implementation Method 1
removable shed sleeves made of dielectric materials like silicone or EPDM elastomer, which form a dielectric interface with the housing
Data Source
AI summary
A method for assembling a housing for a high voltage electrical switch includes providing a tubular body having a top portion and a bottom portion opposite the top portion, wherein the tubular body is configured to receive a vacuum bottle assembly within the tubular body; sliding a first shed sleeve over an outside surface of the top portion without creating a permanent bond, wherein an interior surface of the first shed sleeve forms a dielectric interface between the outside surface of the top portion and the interior surface of the first shed sleeve; and sliding a second shed sleeve over an outside surface of the bottom portion without creating a permanent bond, wherein an interior surface of the second shed sleeve forms a dielectric interface between the outside surface of the bottom portion and the interior surface of the second shed sleeve.