Toroidal Spring Resistor Insertion Circuit Breaker
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High and very high voltage current interrupting and breaking devices face challenges with high manufacturing costs and complex mechanical systems due to the use of multiple components and unlocking mechanisms, particularly in resistor insertion systems for overvoltage limitation during reclosing operations.
Innovation Solution
A medium or high voltage electrical switch with a mechanical device featuring a control rod, a movable contact secured by a flexible toroidal coil spring, and an energy accumulation system, allowing for the parallel insertion of a resistor during closing maneuvers using two insertion contacts, a return spring, and an elastic element for temporary connection, eliminating the need for retractable parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional resistor insertion systems are used with multiple components and unlocking mechanisms, then the resistor insertion function is achieved, but the manufacturing cost increases and the mechanical system becomes complex
Solution Approach 1:
The patent combines the resistor insertion contact and the control rod into a single integrated component. The control rod directly serves as the movable contact that inserts the resistor during closing operations, eliminating the need for separate insertion mechanisms and reducing mechanical complexity while maintaining the required functionality.
Solution Approach 2:
The control rod performs multiple functions: it controls the opening/closing of the main contacts and simultaneously serves as the movable contact for resistor insertion. This multi-functionality reduces the number of components needed and simplifies the overall mechanical system structure.
2Reliability
If traditional resistor insertion systems with multiple components are used, then the resistor insertion function is achieved, but the manufacturing cost increases
Solution Approach 1:
By merging the control rod and movable contact into one component, the number of parts requiring manufacturing, assembly, and quality control is reduced, directly lowering manufacturing costs while maintaining the resistor insertion function.
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate components from the traditional system, keeping only the essential control rod that performs both control and resistor insertion functions, thereby reducing manufacturing complexity and cost.
3Ease of operation
If retractable parts are used in the resistor insertion system, then the insertion mechanism is achieved, but the mechanical design becomes more complex
Solution Approach 1:
The control rod is designed as a single non-retractable component that directly performs the insertion motion during the normal closing operation, eliminating the need for separate retractable mechanisms and simplifying the mechanical design.
Solution Approach 2:
Instead of using a retractable mechanism that pulls the resistor in, the system uses the natural closing motion of the control rod to push the resistor into position, inverting the traditional approach and eliminating retractable parts.
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 solution simplifies the mechanical design, reduces manufacturing costs, and ensures efficient resistor insertion and return, effectively managing overvoltages during closing operations without interfering with the switch or circuit breaker's opening cycle.
Implementation Method 1
a flexible toroidal coil spring placed in a groove of the control rod and an energy accumulation system resting on the movable rod which is intended to be loaded up to a certain value. determined for which the flexible toroidal coil spring deforms under the force and allows the removal of the movable contact
Implementation Method 2
a flexible toroidal coil spring placed in a groove of the control rod
Implementation Method 3
at least one return spring constituting the energy accumulation system, which makes it possible to return the movable resistance insertion contact to its initial position and which is placed between the contact carrier, which is tubular, and the movable contact resistance insertion which is also tubular and integral with the control rod, the at least one return spring being able to serve as a conductor with respect to the resistance
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a switch that can be used, inter alia, in a resistor insertion device and does not require additional movable mechanical parts. Said switch essentially comprises a flexible toroid helical spring (8) arranged in a notch of the control rod (1) having the contact for inserting the resistor (2) and springs (4) arranged around the movable contact for inserting the resistor and intended to be compressed up to a certain value at which the flexible toroid helical spring (8) is capable of deforming under the force applied and enables the withdrawal (2) of the movable contact for inserting the resistor. The invention can be used for high and very-high voltage circuit breakers and switches.