Multiple Terminals Bushing Assembly for Electrical Transformers
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Solution Overview
Problem
The existing bushing assemblies for electrical transformers face challenges with limited mounting space, especially when additional high current connections are required, and are not easily adaptable to various applications due to their size and configuration.
Innovation Solution
A multiple terminals bushing assembly with two press plates serving as insulation supports, a clamping arrangement using bolts and a sealing plate to minimize space requirements and facilitate easy modifications, featuring a ring-shaped gasket for fluid leakage prevention and a two-level construction for high current applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional molded epoxy bushings or multi-piece assemblies with porcelain isolators are used, then electrical insulation is achieved, but the mounting space increases and outer dimensions of the transformer increase
Solution Approach 1:
The patent combines multiple bushing functions into a single integrated assembly where multiple connector elements are mounted on a common insulating support structure. This merging of functions reduces the overall mounting space compared to using separate traditional bushings for each connection point.
Solution Approach 2:
The insulating support structure serves multiple functions simultaneously: it provides electrical insulation, mechanical support for multiple connector elements, and a standardized mounting platform. This multi-functionality eliminates the need for separate structural and insulating components, reducing overall space requirements.
2Ease of operation
If bushings are placed on the cover of the transformer in single or multiple rows, then electrical connections are established, but the connection to the control unit grid becomes difficult and mounting space is wasted
Solution Approach 1:
The patent transitions from traditional vertical arrangement of bushings on the transformer cover to a horizontal arrangement on the side wall. This dimensional change optimizes space utilization and improves accessibility for control unit connections by distributing terminals in a more accessible pattern.
3Adaptability or versatility
If traditional bushing arrangements are used, then electrical connections are established, but adaptability to various modifications for specific applications is limited
Solution Approach 1:
The bushing assembly is segmented into modular components: a standardized insulating support structure and separate connector elements. This segmentation allows flexible configuration where connector elements can be added, removed, or repositioned based on specific application requirements without redesigning the entire assembly.
Solution Approach 2:
The patent creates a dynamic and flexible bushing assembly where the number and position of connector elements can be adapted to different applications. The standardized support structure provides a stable base while allowing dynamic reconfiguration of the electrical connections.
Data Source
Figure 1A~1B
Figure 2~3
Figure 4~5
AI summary
Multiple terminals bushing assembly for an electrical transformer, comprising: • an insulating support, comprising: • a pair of closely spaced press plates (3, 4) made of an insulating material and arranged in an opening of the transformer casing (6), whereby each of the press plates having corresponding openings (12) which are adapted for connector (2, 21) elements passing through the openings; • a ring-shaped gasket (7) arranged in each opening and in contact with each of the press plates and the curved surface area of a corresponding connector element; • a clamping arrangement (17) for squeezing the gasket.