Pressure-Gelated Insulating Part for High Voltage Switches
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Solution Overview
Problem
Existing insulating parts for high voltage switches in metal-enclosed circuit breaker systems face challenges in meeting mechanical, electrical, and thermal requirements while being cost-effective and easy to manufacture, particularly in complex designs that require precise features like through-holes and collars for supporting movable contacts and terminal blocks.
Innovation Solution
A pressure-gelated casting of a polymeric composite material, such as an outdoor epoxy system filled with anorganic powders like quartz or alumina flour, is used to create an insulating part with a complex design that includes a base-plate with through-holes and collars, enabling mechanical stability, high voltage resistance, and gastight sealing, which can be manufactured with low costs and high precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If insulating parts are milled from hard paper plates, then manufacturing is possible with conventional methods, but manufacturing precision and mechanical stability are insufficient for complex designs
Solution Approach 1:
The patent changes the manufacturing method from mechanical milling to pressure-gelated casting, fundamentally altering the production parameters. This casting process allows complex geometries including through-holes and collars to be formed directly in one step, achieving high precision without complex machining operations.
Solution Approach 2:
The patent employs composite materials consisting of polymeric base materials reinforced with inorganic fillers (such as alumina or quartz flour). This composite structure provides both the mechanical strength required for high voltage applications and the dimensional stability needed for precise casting, resolving the contradiction between manufacturing precision and ease of manufacture.
2Reliability
If insulating parts are made with complex design features, then mechanical stability and electrical performance improve, but manufacturing cost and complexity increase
Solution Approach 1:
The patent merges multiple design features (through-holes, collars, mounting surfaces, and insulating structures) into a single monoblock component manufactured by pressure-gelated casting. This integration eliminates the need for separate manufacturing and assembly steps for each feature, reducing overall device complexity while maintaining mechanical stability and electrical performance.
Solution Approach 2:
The insulating part is designed as a multi-functional component that simultaneously provides mechanical support, electrical insulation, precise alignment features (through-holes and collars), and mounting capabilities. This universal design approach achieves high reliability without proportionally increasing complexity, as all functions are integrated into one cast component.
3Ease of manufacture
If insulating parts are made from hard paper plates, then manufacturing is simple, but resistance to tracking and thermal stability are insufficient
Solution Approach 1:
The patent replaces hard paper plates with composite materials comprising polymeric matrices filled with inorganic substances such as alumina or quartz flour. These composites provide superior resistance to electrical tracking and enhanced thermal stability while maintaining ease of manufacture through the pressure-gelated casting process.
Solution Approach 2:
The patent changes the material composition parameters from organic paper-based materials to inorganic-filled polymeric composites. This material substitution fundamentally improves resistance to tracking and thermal stability while the casting method maintains manufacturing simplicity, resolving the contradiction between reliability and ease of manufacture.
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
The solution provides improved mechanical stability, high resistance to tracking, breakdown strength, and thermal stability, reducing manufacturing and maintenance costs while ensuring reliable operation under extreme conditions and long-term storage without significant moisture absorption.
Implementation Method 1
The insulating part according to the invention is executed as a pressure-gelated casting on the base of a polymeric composite material
Implementation Method 2
A base-plate of the insulating part has a centrally arranged large through-hole for receiving a stationary current terminal block of the high voltage switch and small through-holes for receiving fastening screws
Data Source
AI summary
An insulating part (20) is provided for a high voltage switch of a metal-enclosed circuit-breaker system and is executed as a pressure-gelated casting on the base of a polymeric composite material. It comprises a base-plate (21) with a centrally arranged large through-hole (23) for receiving a current terminal lead of the high voltage switch and with small through-holes (24, 25) for receiving fastening screws. The insulating part further comprises two bearing blocks (22) for receiving a shaft of a movable contact of a contact arrangement of the switch and at least a first collar (26) which surrounds the large through-hole (23).For reason of the execution as a pressure-gelated casting the insulating part (20) can be manufactured easily with low costs but with high precision. In general a finish-maching of the casting is not required. The integration of the large through-hole (23) and of the small through-holes (24, 25) as well as of the two bearing blocks (22) and the first collar (26) into the insulating part (20) during pressure gelation of the polymeric composite material result in a complex design which fulfills all required mechanical, electrical and thermal functions during operation of the system.