Blade Toggle Air Break Switch with Integrated Vacuum Interrupter
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Solution Overview
Problem
Conventional high voltage/high current air break switches require complex and space-consuming load interrupters to prevent arcing, increasing operational complexity and space requirements.
Innovation Solution
Integration of a load interrupter into the blade portion of the switch, utilizing a vacuum bottle with movable contacts and a bistable assembly to manage electrical engagement and disengagement, allowing for simplified operation and reduced spatial needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate load interrupter is located adjacent the switch, then arcing is prevented at terminal contacts, but space requirements and operational complexity increase
Solution Approach 1:
The load interrupter mechanism is merged with the switch blade assembly. The blade itself becomes part of the load interrupter mechanism, with the blade support housing containing the vacuum bottle and contacts. This integration eliminates the need for a separate adjacent load interrupter device, reducing operational complexity while maintaining arcing prevention functionality.
Solution Approach 2:
The blade assembly serves multiple functions: it acts as both the electrical conductor and the operating mechanism for the load interrupter. The blade support housing contains both the blade mounting structure and the vacuum bottle with load interrupter contacts, making the assembly multi-functional and eliminating separate components.
2Reliability
If a separate load interrupter is located adjacent the switch, then arcing is prevented at terminal contacts, but space needs of the frame increase
Solution Approach 1:
The load interrupter is merged into the blade support housing structure. The vacuum bottle, contacts, and blade mounting are integrated into a single compact assembly, eliminating the need for separate adjacent load interrupter equipment and reducing the overall frame space required.
Solution Approach 2:
The vacuum bottle containing the load interrupter contacts is nested within the blade support housing. The blade is mounted on the housing, creating a compact nested structure where multiple functional elements occupy overlapping spatial volumes, thereby reducing the total footprint.
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
Simplifies the construction and operation of high voltage/high current air break switches by eliminating the need for separate load interrupters, reducing complexity and space requirements while preventing arcing during electrical transitions.
Implementation Method 1
a load interrupter with contacts in a vacuum bottle
Data Source
AI summary
A high voltage/high current air break switch, the switch including a support frame and a blade pivotally supported by the support frame, so as to be pivotable relative to the support frame. The blade includes a load interrupter between a blade support and the distal end of the blade. And a method of operating an air break electrical switch with a swinging blade mounted on a support and having blade contacts brought into and out of engagement with a terminal with terminal contacts, and a load interrupter with contacts in a vacuum bottle, the method steps comprising turning the support to move the blade relative to the terminal, then turning the support to move the vacuum bottle electrical contacts and to move the blade contacts relative to the terminal contacts.