Grounded High-Voltage Switch With Polymer Insulation Instead of SF6
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Solution Overview
Problem
Existing high voltage circuit breakers rely on pressurized vessels and insulating gases like sulfur hexafluoride (SF6), which pose environmental hazards and maintenance challenges due to gas leakage, and alternative vacuum interrupters with air insulation are costly and inefficient.
Innovation Solution
A high voltage switch utilizing a grounded housing with solid polymer insulation, eliminating the need for pressurized vessels and gas monitoring, by using a vacuum interrupter encapsulated in a conductive housing with polymer insulating material to manage electric fields effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SF6 gas is used for insulation and arc interruption, then high dielectric strength and arc extinguishing capability are achieved, but gas leakage and environmental hazards occur
Solution Approach 1:
The patent extracts and eliminates the SF6 gas from the system by using a vacuum interrupter instead. The vacuum environment provides the necessary insulation and arc interruption capabilities without requiring harmful gas, directly resolving the contradiction between dielectric strength and gas leakage hazards
Solution Approach 2:
The patent employs a vacuum environment (inert atmosphere without gas molecules) within the interrupter chamber to provide insulation and arc extinguishing properties. This vacuum environment replaces SF6 gas while eliminating the associated leakage and environmental problems
2Reliability
If pressurized vessels and gas monitoring systems are used, then gas containment and safety monitoring are improved, but device complexity and maintenance requirements increase
Solution Approach 1:
The patent removes the entire gas containment system (pressurized vessels, monitoring systems, rupture discs) by eliminating the need for SF6 gas through vacuum technology. This extraction of the gas-based system directly reduces device complexity while maintaining safety and reliability
Solution Approach 2:
The vacuum interrupter is inherently sealed and maintains its vacuum environment without requiring external monitoring or containment systems. The vacuum itself serves as both the insulating medium and the sealed environment, eliminating the need for complex gas management infrastructure
3Reliability
If solid polymer insulation is used instead of gas insulation, then void-free insulation and reduced electric field strength are achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses solid polymer insulation material that combines excellent dielectric properties with void-free structural characteristics. The polymer material inherently prevents void formation while providing reliable insulation, balancing manufacturing feasibility with performance requirements
Solution Approach 2:
The patent changes the physical state of the insulation medium from gas to solid polymer. This parameter change eliminates void-related issues and provides more consistent electric field distribution, though it requires precise molding processes to achieve the desired insulation quality
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 a cost-effective and environmentally friendly high voltage switch that maintains performance without gas leaks, reducing operational costs and environmental impact while ensuring reliable operation under high voltage conditions.
Implementation Method 1
high voltage vacuum switch
Implementation Method 2
polymer insulating material can surround the switch within the housing
Data Source
AI summary
Devices, systems, and methods are provided for a high voltage switch. The device can include a first housing, a switch, and a polymer insulating material. The housing can be at ground potential. The switch can be located within the housing and can include a current-breaking component and a moving contact. The current-breaking component can include a fixed contact and an opening contact. The fixed contact can be coupled to a first power lead. The opening contact can be configured to receive a moving contact. The moving contact can be coupled to a second power lead and can be controlled by an actuating mechanism. The polymer insulating material can surround the switch within the housing.