Removable Screen Circuit Breaker Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High voltage circuit breakers with removable screens face complexity in screen movement control, leading to increased risk of internal arcing and damage due to numerous parts, which complicates design and assembly.
Innovation Solution
A simplified screen displacement system using fewer parts, where the screen is integral in movement with contacts via elastic constraints and abutments, reducing the risk of internal ignition and weight, while maintaining optimal electric field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a removable screen is added to improve electric field distribution, then dielectric strength is improved, but device complexity increases due to additional movement control mechanisms
Solution Approach 1:
The screen is merged with the connecting rod through direct attachment, eliminating the need for separate movement control mechanisms. The screen moves automatically with the connecting rod during circuit breaker operation, simplifying the overall structure while maintaining the electric field distribution benefits
Solution Approach 2:
The connecting rod serves dual functions: it operates the circuit breaker contacts and simultaneously moves the screen. This multi-functionality reduces the number of separate components and simplifies the movement control system while maintaining effective screen positioning
2Manufacturing precision
If multiple securing means are used to control screen movement, then screen positioning precision is improved, but device complexity and number of parts increase
Solution Approach 1:
Multiple securing functions are merged into the single connecting rod structure. The connecting rod integrates the screen attachment and movement control functions, eliminating the need for separate rods, stops, and elastic constraint mechanisms while maintaining precise screen positioning throughout the circuit breaker operation
3Ease of operation
If a complex screen displacement system is implemented, then screen movement control is improved, but risk of internal arcing and damage increases
Solution Approach 1:
The problematic intermediate components (rods, stops, elastic constraint means) are extracted from the system. By directly attaching the screen to the connecting rod, the patent eliminates potential failure points and internal arcing risks associated with complex mechanical interfaces, while maintaining effective screen movement control
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 simplifies the design and assembly of high voltage circuit breakers, reduces the risk of internal ignition, and maintains effective electric field distribution, enhancing the overall performance and reliability of the circuit breaker.
Implementation Method 1
at least one means of elastic constraint
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The invention relates to a high-voltage circuit breaker (1) with a removable screen (60), the circuit breaker (1) having a closed position and an open position and comprising first and second contacts (10, 20) that are translatable relative to one other, and third and fourth contacts (30, 40) that are also translatable relative to one another. The circuit breaker (1) further comprises a screen (60) arranged to be intercalated between the first and third contacts (10, 30), at least first means for rigidly connecting in terms of movement with one of the second and third contacts (20, 30) and at least second means for rigidly connecting in terms of movement suitable for rigidly connecting the screen (60) in terms of movement with one of the first and third contacts (10, 30), said second means for rigidly connecting in terms of movement inhibiting the first rigid connecting means from a predefined position of the screen (60). The second means for rigidly connecting in terms of movement comprise at least one first stop arranged on said contact (30) and a first counter-stop arranged on the screen (60).