Circuit Breaker Closing Resistor Sliding Support Structure

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Solution Overview

Problem

Conventional circuit breakers with closing resistors suffer from damage due to repeated opening and closing cycles, caused by unabsorbed impact and vibration, leading to structural deterioration and potential contact breakage.

Innovation Solution

A support structure is introduced that slidably supports the closing resistor unit parallel to its movement direction, using an insulation block and a support guide with a guide rod and bearing to absorb impact and vibration, reducing mechanical stress on the circuit breaker components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the closing resistor unit is rigidly fixed in the conventional circuit breaker, then the structure is simple and easy to manufacture, but impact due to opening/closing is transferred to the closing resistor unit and peripheral mechanisms, causing damage and vibration

Engineering Contradiction:

Improvedurability of closing resistor unitVSAvoidcomplexity of support structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The support structure transitions from a rigid fixed connection to a dynamic sliding connection. The closing resistor unit can slide along the guide rod within the guide groove, allowing controlled movement that absorbs impact while maintaining structural support. This dynamic capability prevents damage during opening/closing operations.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The support structure acts as an intermediary between the closing resistor unit and the circuit breaker body. It mediates the impact forces by providing a sliding interface that absorbs shock, preventing direct transmission of harmful forces to both the closing resistor unit and the main circuit breaker structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the closing resistor unit is rigidly fixed, then assembly is simple, but repeated opening and closing cycles cause unabsorbed impact and vibration leading to structural deterioration

Engineering Contradiction:

Improvestructural durabilityVSAvoidease of assembly

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The support structure provides controlled movement through sliding mechanics. The guide rod and guide groove create a defined path for the closing resistor unit to move along, absorbing impact dynamically while maintaining proper positioning. This ensures structural durability without overly complicating assembly.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The support structure is designed in advance to cushion and absorb impact before it can cause damage. The sliding mechanism is pre-configured to accommodate the expected range of motion and absorb the forces generated during normal opening and closing cycles, preventing structural deterioration.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Object-affected harmful factors

If the closing resistor unit is rigidly fixed, then the structure is stable, but impact is transferred to peripheral mechanisms causing potential contact breakage

Engineering Contradiction:

Improveimpact reductionVSAvoidstability of closing resistor unit

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The support structure introduces controlled dynamics to the previously static system. By allowing the closing resistor unit to slide along the guide rod within the guide groove, the system can dynamically respond to impact forces, absorbing them through the sliding mechanism while maintaining overall stability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The support structure converts the harmful impact forces into beneficial controlled movement. Instead of rigidly transmitting impact forces that cause damage, the sliding mechanism allows the energy to be absorbed through controlled displacement, transforming a harmful effect into a protective function.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 support structure effectively absorbs and relieves impact and vibration, enhancing the structural durability and reliability of the circuit breaker, reducing the risk of damage and improving assembly and maintenance convenience.

Implementation Method 1

a bearing may be provided between the guide groove and the guide rod

Methodology Applied

Scientific EffectRolling contact: Ball Bearing

Data Source

PatentUS9997321B2Circuit breaker having closing resistor

Publication Date: 2018.06.12 LSIS CO LTD

AI summary

Disclosed herein is a circuit breaker having a closing resistor, which is capable of preventing impact caused when the circuit breaker is opened and closed from being transferred to peripheral structures. The circuit breaker having a closing resistor includes a fixed part having a fixed contact, a movable part having a movable contact, a closing resistor unit connected to the fixed part and having a closing resistor unit contact, a closing resistor movable part connected to the movable part and having a closing resistor movable contact, and a support structure slidably coupled to the closing resistor unit in a direction parallel to a movement direction of the closing resistor movable part, thereby enabling impact and vibration applied to the closing resistor unit to be absorbed by the support structure.