Closing Resistor Support Structure for High Voltage Circuit Breakers
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Solution Overview
Problem
High voltage circuit breakers face challenges in maintaining linear motion and resisting impact forces during closing operations, leading to potential twisting of the moving part due to increased voltage and stronger driving forces, which weaken the coupled state between the closing resistor and the fixed part.
Innovation Solution
A supporting structure for the closing resistor, featuring a fixed part main circuit conductor, a supporting conductor with a coupling rib, a connecting conductor with a coupling groove, and additional insulating support plates, providing multi-point stabilization to resist torsional moments and maintain stability during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the rated voltage increases, then the driving force of the breaking unit becomes stronger, but the impact force applied to the fixed part upon closing becomes greater, causing the moving part to twist
Solution Approach 1:
The closing resistor support structure is divided into multiple segments: the closing resistor mounted on the moving part, the fixed part main circuit conductor, the supporting conductor, the connecting conductor, and the coupling conductor. This segmentation allows each component to bear specific loads and resist impact forces independently, preventing the moving part from twisting during closing operations.
Solution Approach 2:
The patent introduces a three-dimensional support structure with conductors extending in multiple directions (supporting conductor on upper surface, connecting conductor at one end, coupling conductor linking both). This spatial arrangement creates a rigid framework that resists torsional moments and maintains linear motion stability during high-voltage breaking operations.
2Force
If the closing resistor and closing resistor moving unit directly collide without sliding, then the impact resistance increases, but the moving part may be twisted due to rotation or coupling force
Solution Approach 1:
The coupling conductor acts as an intermediary element between the supporting conductor and the closing resistor unit. It transmits forces and moments while maintaining the coupled state, preventing direct transmission of torsional forces that would cause twisting. The coupling rib and groove mechanism provides controlled force transmission without rigid direct collision.
3Reliability
If additional components are attached to the circuit breaker, then the voltage reduction capability improves, but it becomes difficult to maintain linear motion of the moving part and fixed part
Solution Approach 1:
The patent merges the closing resistor support function with the main circuit conductor structure. The supporting conductor is mounted on the fixed part main circuit conductor, and the coupling conductor integrates the support function with the circuit conductor, creating a unified structure that maintains linear motion while providing voltage reduction capability.
Data Source
AI summary
The present invention relates to a supporting structure of a closing resistor for a high voltage circuit breaker, capable of stably supporting the closing resistor not to be twisted even by an impact applied upon a closing operation. A supporting structure of a closing resistor for a high voltage circuit breaker according to one embodiment includes a fixed part main circuit conductor, a supporting conductor installed on an upper surface of the fixed part main circuit conductor, a connecting conductor connected to one end of the supporting conductor, a closing resistor unit coupled to one side of the fixed part main circuit conductor in a spaced manner, and a coupling conductor provided to couple the supporting conductor to the closing resistor unit. The supporting conductor and the connecting conductor are provided with a coupling rib and a coupling groove, respectively, to be coupled to each other in an inserting manner.