Eccentric Contact Element Surge Arrester Bushing Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surge arresters have limited design flexibility due to fixed positions and arrangements of discharge columns determined by the geometry of high-voltage contacts, making them inflexible for adaptation to different bushing arrangements without requiring constructive changes to other components.
Innovation Solution
A surge arrester design featuring a fluid-tight housing with an eccentrically arranged contact element and an adjustable eccentric disk, allowing the contact element to rotate and move parallel to the longitudinal axis, enabling the discharge element to be positioned independently of the high-voltage contact and adapted to various bushing arrangements without altering other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the position of discharge columns is determined by the geometry of high-voltage contacts, then the electrical connection is ensured, but the design flexibility is reduced
Solution Approach 1:
The patent introduces an adjustable contact element that can be positioned at different locations on the bushing, transforming a static design into a dynamic one. This allows the surge arrester to adapt to different bushing arrangements without requiring constructive changes to the housing or discharge element arrangement, thereby improving design flexibility while maintaining electrical connection reliability
Solution Approach 2:
The contact element is separated from the fixed housing structure and made independently adjustable. This segmentation allows the contact element to be modified or repositioned without affecting other components, enabling adaptation to different configurations while keeping the overall device structure intact
2Adaptability or versatility
If the housing is designed for specific discharge element arrangement, then structural integrity is maintained, but adaptability to different bushing arrangements is reduced
Solution Approach 1:
The contact element is extracted from the fixed housing structure and made independently adjustable on the bushing. This allows the housing to maintain its original structural integrity while the contact element can be repositioned to accommodate different bushing arrangements, achieving adaptability without compromising structural stability
3Ease of operation
If fixed contact positions are used, then manufacturing is simplified, but assembly flexibility is reduced
Solution Approach 1:
The contact element is designed with adjustability, allowing it to be positioned at different locations during assembly. This dynamic feature provides assembly flexibility for different configurations while the adjustment mechanism itself can be manufactured using standard processes, balancing manufacturing complexity with operational flexibility
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 design provides greater flexibility in positioning the discharge element and bushing, allowing the surge arrester to be easily adapted to different high-voltage contact arrangements without affecting the structural integrity of the isolating device, simplifying assembly and reducing production and storage complexities.
Implementation Method 1
Varistor elements are characterized by a voltage-dependent resistance. At low voltages, these act as insulators. Above a certain threshold voltage, which depends on the material, they show good conductivity.
Implementation Method 2
The housing is filled with a fluid, usually sulfur hexafluoride, to increase the dielectric strength.
Implementation Method 3
the varistor column must be held together under pressure. This can be done by tensioning tension elements, for example ropes or rods preferably made of glass fiber reinforced plastic, in the end fittings under tension.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a surge arrester (1) with a fluid-tight housing (2), an arrester element (5) which is arranged in the fluid-tight housing (2) and which has a longitudinal axis (40), a high-voltage contact (4) which electrically connects the interior of the housing (2) to the exterior of the housing, and a contact element (9) by means of which an electric connection between the arrester element (5) and the high-voltage contact (4) can be established. According to the invention, the contact element (9) is arranged eccentrically to the longitudinal axis (40), and the position of the contact element (9) can be adjusted on a plane perpendicular to the longitudinal axis (40). Advantageously, the arrester element (5) can thus be positioned largely independently of the high-voltage contact (4).