Three-position switch integrated with current transformer core
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Solution Overview
Problem
Existing three-position switches for medium or high-voltage switchgear require significant space due to the arrangement of components on the circumference of the housing, limiting installation options and efficiency.
Innovation Solution
A three-position switch design featuring a displaceable sleeve contact part that slides on a pin-shaped or tubular connection piece, integrated within a current transformer core, allowing for compact assembly and reduced overall space requirements, with the contact part being guided on the second connection piece for enhanced reliability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If components are arranged on the circumference of the housing, then connection accessibility is improved, but the overall space requirement increases
Solution Approach 1:
The patent combines the three-position switch with the current transformer core by integrating the switch housing within the transformer core structure. This merging eliminates the need for separate circumferential component arrangements, reducing overall space while maintaining electrical connection accessibility through the integrated design
2Reliability
If the displaceable contact part is guided on the second connection piece, then functional reliability is improved, but construction complexity increases
Solution Approach 1:
The second connection piece serves multiple functions: it acts as both a structural support element and a guide for the displaceable contact part. This multi-functionality ensures reliable contact guidance while avoiding the need for separate guiding components, thereby reducing construction complexity
3Area of stationary object
If the three-position switch is integrated within the current transformer core, then space requirement is reduced, but manufacturing complexity increases
Solution Approach 1:
The integrated assembly is divided into modular segments: the current transformer core, the switch housing, and the connection pieces are designed as separable modules that can be manufactured independently and then assembled. This segmentation reduces manufacturing complexity while maintaining the space-saving integrated configuration
Data Source
Figure 1~3
AI summary
The switch has an electrically earthed housing (13) comprising two front sides (S1, S2), and two connection pieces (24, 34). A contact part is displaceable along an axis (A) and provided for electrically connecting one of the connection pieces with the housing. The front sides are arranged transverse to the axis, and the connection pieces are connected with an electrical conductor at the respective front sides. A current transformer core is arranged at the circumference of the housing.