Solid Insulated Disconnection Switch for Compact Eco-Friendly Switchgear

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Solution Overview

Problem

Conventional gas-insulated switchgear using SF6 gas faces limitations in size reduction, environmental concerns, and complex manufacturing and maintenance due to non-standardized components and lack of modularity, which hinders spatial efficiency and eco-friendliness.

Innovation Solution

A solid-insulated disconnection switch and switchgear utilizing a solid insulating method with standardized components, featuring a base frame, insulating shaft, stationary and movable contactors, and a power transferring assembly, which reduces size and eliminates the need for SF6 gas, enabling modular design and simplified maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If gas insulation (SF6) is used, then insulation effectiveness is improved, but device size cannot be reduced and environmental harm increases

Engineering Contradiction:

Improveinsulation effectivenessVSAvoiddevice size

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent changes the physical state of the insulating material from gas (SF6) to solid material. This parameter change enables more effective use of insulation space, allowing the device to achieve the same insulation effectiveness with a more compact structure, thus resolving the contradiction between insulation effectiveness and device size.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite insulating structures combining multiple solid materials (epoxy resin, polyimide, air gaps) to achieve superior insulation performance. This composite approach allows for optimized space utilization and enhanced insulation effectiveness while maintaining a compact device footprint.

Inventive Principle:

Principle #40Composite materials

2Reliability

If gas insulation (SF6) is used, then insulation effectiveness is improved, but environmental harm increases

Engineering Contradiction:

Improveinsulation effectivenessVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent eliminates SF6 gas, a substance harmful to the environment, and replaces it with environmentally benign solid insulating materials. This substitution converts the harmful effect into a beneficial outcome by maintaining insulation effectiveness while removing environmental damage, thus resolving the contradiction between insulation effectiveness and environmental harm.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Adaptability or versatility

If non-standardized components are used, then design flexibility is improved, but manufacturing and maintenance complexity increases

Engineering Contradiction:

Improvedesign flexibilityVSAvoidmanufacturing and maintenance complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent divides the switchgear into standardized modular units (disconnection switches, circuit breakers, busbars) that can be configured in different arrangements. This segmentation provides design flexibility for various applications while maintaining manufacturing simplicity through standardization of individual modules, resolving the contradiction between design flexibility and manufacturing complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent designs universal standardized components that can serve multiple functions and be used in different configurations. The standardized disconnection switches and circuit breakers can be adapted to various voltage levels and application requirements, providing design flexibility while simplifying manufacturing and maintenance through component universality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Volume of stationary object

If solid insulation is applied, then device size is reduced, but manufacturing precision requirements increase

Engineering Contradiction:

Improvedevice sizeVSAvoidmanufacturing precision requirements

Core Design Contradiction:

Volume of stationary objectVSManufacturing precision

Solution Approach 1:

The patent incorporates insulation materials during the molding and assembly process itself, rather than adding them separately afterward. The insulating shafts, contactor housings, and spacers are molded with integrated insulation features, ensuring precise insulation clearances are built-in during manufacturing. This preliminary action reduces the need for post-manufacturing adjustments and maintains manufacturing feasibility despite compact dimensions.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS7589289B2Solid insulated disconnection switch and solid insulated switchgear using the same

Publication Date: 2009.09.15 LG INDUSTRIAL SYSTEMS CO LTD

AI summary

Disclosed are a solid-insulated disconnection switch and a solid-insulated switchgear using the same. The solid-insulated switchgear using the solid-insulated disconnection switch according to the present invention can have an eco-friendly characteristic and a small size by solid-insulating each unit, a disconnection switches and earth switch constituting each unit.In the solid-insulated switchgear according to the present invention, each unit and each part constituting each unit are standardized so as to be interchangeable to each other, thereby implementing a simple manufacture.Furthermore, the solid-insulated switchgear can be manufactured according to an installation environment and a user's various demands, and can have an enhanced maintenance/repair characteristic.