Vacuum Switching Unit With Integrated Sleeve Capacitor Electrodes
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Solution Overview
Problem
Vacuum circuit breakers face challenges in controlling voltage with conventional control capacitors, which require large installation spaces due to low dielectric strength of compressed air, necessitating increased insulation distances.
Innovation Solution
Integration of capacitor electrodes into an insulating sleeve surrounding the vacuum switching tube, reducing the need for separate control capacitors and minimizing installation space by distributing capacitance uniformly around the tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional control capacitors are used for voltage control, then voltage control function is achieved, but installation space increases due to large insulation distances required
Solution Approach 1:
The patent combines the control capacitor functionality with the insulating sleeve structure by integrating capacitor electrodes directly into the insulating sleeve. This merging eliminates the need for separate control capacitors and reduces insulation distances, thereby solving the space consumption problem while maintaining voltage control functionality.
Solution Approach 2:
The insulating sleeve is given multiple functions: it provides electrical insulation and simultaneously houses the capacitor electrodes for voltage control. This multi-functionality allows the same component to serve both insulation and voltage control purposes, reducing the overall space required.
2Reliability
If large insulation distances are maintained for compressed air insulation, then dielectric strength is ensured, but installation space increases
Solution Approach 1:
The patent uses a composite structure combining solid insulating material (insulating sleeve) with compressed air insulation. The solid insulating sleeve provides primary insulation with high dielectric strength, allowing reduced insulation distances for the compressed air, thereby maintaining dielectric strength while reducing installation space.
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 configuration reduces insulation distances and saves space, enhancing the insulating effect of compressed air while maintaining effective voltage control.
Implementation Method 1
an insulating sleeve (5) that surrounds the vacuum switching tube (3), extends in a tubular manner around a longitudinal axis (37) of the vacuum switching tube (3) and is made of an insulating material
Implementation Method 2
a plurality of capacitor electrodes (7, 8) integrated into the insulating sleeve (5)
Implementation Method 3
purified and dehumidified compressed air as an insulating medium surrounding the vacuum switching tubes
Data Source
AI summary
A vacuum switching unit of a vacuum circuit breaker has a vacuum interrupter, an insulating sleeve which surrounds the vacuum interrupter, extends tubularly about a longitudinal axis of the vacuum interrupter and is made of an insulating material. A plurality of capacitor electrodes are integrated into the insulating sleeve.