Rotary Switch Integrated Clearing Contact System
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Solution Overview
Problem
Existing medium-voltage switchgear devices have a complex structure due to separate components for quenching and main contact systems, which increases space requirements and complicates the switching process.
Innovation Solution
A load-break rotary switch design with a 360° rotatable moving contact integrated with a clearing contact system, utilizing a vacuum interrupter and a cam track mechanism to simplify the switching process and reduce space requirements by integrating the clearing contact system within the moving contact, allowing for compact arrangement in a gas-filled container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are used for quenching contact system and main contact system, then the switching device can perform arc extinguishing and dielectric isolation functions, but the structure becomes complex and space requirements increase
Solution Approach 1:
The patent combines the quenching contact system and main contact system into a single integrated moving contact assembly. The vacuum interrupter (quenching contact system) is directly integrated with the rotatable moving contact (main contact system), eliminating the need for separate components and reducing structural complexity while maintaining both arc extinguishing and dielectric isolation functions.
Solution Approach 2:
The integrated moving contact assembly serves multiple functions simultaneously: it acts as both the quenching contact system (for arc extinguishing) and the main contact system (for dielectric isolation). The single rotating component performs both switching operations, making the device more versatile and compact.
2Reliability
If separate components are used for quenching contact system and main contact system, then the switching device can perform arc extinguishing and dielectric isolation functions, but space requirements increase
Solution Approach 1:
The patent merges the quenching contact system and main contact system into a single integrated moving contact assembly. The vacuum interrupter is directly coupled with the rotatable moving contact, reducing the overall volume required for both functions compared to separate component arrangements.
Solution Approach 2:
The vacuum interrupter (quenching contact system) is nested within or directly integrated with the moving contact assembly (main contact system). This nested configuration allows the quenching contacts to be housed within the same spatial envelope as the main contacts, significantly reducing the overall space requirement.
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 compact design enables efficient arc extinguishing and dielectric isolation with reduced space requirements, allowing for alternate switch-on and switch-off positions through 90° rotations, facilitating cost-effective and efficient switching operations in medium-voltage switchgear.
Implementation Method 1
a quenching contact system for extinguishing an arc in the form of a vacuum interrupter
Implementation Method 2
a main contact system for forming a dielectric isolating gap when the main contact system is in an open state
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
In order to design a switching device (1), in particular load-break switches, for medium-voltage switchgear, comprising a quench contact system for quenching an arc during a shut-down process of the switching device (1) and a primary contact system connected in series to the quench contact system for forming a dielectric isolating distance with an open state of the primary contact system and quenched arc, which switching device has a compact design, according to the invention the primary contact system comprises a first fixed contact (2) and a second fixed contact (3), which are diametrically opposed to one another, and a movable contact (4), which can be rotated by means of a rotary post insulator (5) arranged centrally between the first fixed contact (2) and the second fixed contact (3) and which has a quench contact system integrated therein.