Vacuum Interrupter Capacitive Insulator Voltage Distribution
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Solution Overview
Problem
High-voltage switching arrangements in transmission networks require complex and costly control elements to distribute voltage across individual circuit-breaker chambers, leading to increased technical and installation expenses.
Innovation Solution
Integration of capacitive and resistive elements directly onto the surface of the ceramic insulator elements within the vacuum interrupter, reducing the need for external control elements and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control elements (capacitors or capacitor-resistor series) are connected in parallel to individual power switching chambers to distribute voltage, then voltage distribution is controlled, but additional installation space is required and technical expenditure increases
Solution Approach 1:
The control element is merged with the insulator element by integrating the capacitive element directly onto the insulator surface. The insulator element serves dual purposes: electrical insulation and voltage distribution control. This eliminates the need for separate control elements and their associated installation infrastructure, thereby reducing technical expenditure and installation complexity while maintaining voltage distribution control.
Solution Approach 2:
The insulator element is designed to perform multiple functions simultaneously: providing electrical insulation between conductive parts and controlling voltage distribution across switching chambers. By embedding the capacitive element on the insulator surface, the insulator becomes a multi-functional component that eliminates the need for dedicated control elements, reducing overall device complexity.
2Reliability
If control elements are connected in parallel to individual power switching chambers to distribute voltage, then voltage distribution is controlled, but manufacturing and assembly costs increase
Solution Approach 1:
The control element is manufactured as an integrated part of the insulator element. The capacitive element is formed directly on the insulator surface during the insulator manufacturing process, eliminating separate manufacturing steps for control elements and their subsequent assembly. This integration reduces manufacturing complexity and assembly costs while ensuring precise voltage distribution control.
Solution Approach 2:
The capacitive element is pre-formed as part of the insulator element during its manufacturing process, before the insulator is installed in the switching chamber. This preliminary integration ensures that the control function is built-in from the start, eliminating the need for separate assembly operations and reducing overall manufacturing and assembly costs.
3Reliability
If separate control elements are installed in an isolated manner, then voltage distribution control is achieved, but technical and cost-intensive expenditure increases
Solution Approach 1:
The control function is merged into the insulator element structure itself. The capacitive element is integrated onto the insulator surface, eliminating the need for separate control element installations and their associated technical infrastructure. This integration significantly reduces technical expenditure while maintaining effective voltage distribution control across the switching chambers.
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 integration reduces manufacturing and assembly costs while effectively distributing voltage, minimizing technical complexity and enabling more efficient high-voltage switching arrangements.
Implementation Method 1
a capacitive element is provided with two electrodes and a dielectric material arranged between the electrodes, the capacitive element being attached to the insulator element in a form-fitting manner and having a capacitance of between 400 pF and 4000 pF
Implementation Method 2
a capacitive element is provided with two electrodes and a dielectric material arranged between the electrodes
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a vacuum interrupter (2), comprising: a housing (3) having at least one annular ceramic insulating element (4), which forms a vacuum chamber (6), a contact system (8) having two contacts (9, 10), which are movable relative to one another. The invention is characterized in that a capacitive element (12) having two electrodes (14) and having a dielectric material (16) arranged between the electrodes (14) is provided, the capacitive element (12) being interlockingly mounted on the insulating element (4) and having a capacitance between 400 pF and 4000 pF.