Circuit Breaker Cutoff Structure for Rapid Arc Extinction
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Solution Overview
Problem
Existing electric circuit breakers struggle to quickly extinguish arcs that form when cutting a conductor piece, leading to incomplete circuit interruption.
Innovation Solution
An electric circuit breaker device with a projectile system comprising a first projectile to cut off a conductor piece and a second projectile to press the cutoff portion into an arc-extinguishing region containing a coolant material, ensuring rapid arc extinction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single projectile is used to cut the conductor piece, then the device structure is simple, but the arc cannot be quickly extinguished
Solution Approach 1:
The projectile system is segmented into a first projectile for cutting the conductor and a second projectile for pressing the cutoff portion into the arc-extinguishing region. This segmentation allows each projectile to be optimized for its specific function, with the first projectile having a cutting edge and the second projectile having a pressing surface, thereby quickly extinguishing the arc while maintaining reasonable structural complexity
Solution Approach 2:
The first and second projectiles are combined into a single integrated projectile assembly that is propelled together by the igniter. The two projectiles work in sequence within the same accommodating space, merging the cutting and arc-extinguishing functions into a coordinated single-action system, which maintains operational simplicity while achieving reliable arc extinction
2Reliability
If the second projectile is larger in size, then it can more effectively press the cutoff portion, but the accommodating space requirements increase
Solution Approach 1:
The second projectile is designed with a specific local quality - a pressing surface oriented toward the arc-extinguishing region. Rather than requiring a uniformly large size, the projectile concentrates its pressing function in the specific area needed to push the cutoff portion into the coolant material, achieving effective arc extinction with minimized volume
Solution Approach 2:
The second projectile is positioned coaxially with the first projectile, utilizing the axial dimension of the accommodating space. This dimensional arrangement allows the second projectile to follow the first projectile's path and press the cutoff portion effectively without requiring excessive transverse space, optimizing the use of the accommodating space volume
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 device effectively and quickly extinguishes arcs by utilizing a two-projectile system to cut and cool the arc, enhancing circuit interruption efficiency.
Implementation Method 1
a projectile to be projected along an accommodating space formed in a housing by energy received from an igniter
Implementation Method 2
a first projectile configured to cut off a cutoff portion from a conductor piece by being projected by the energy received from the igniter
Implementation Method 3
a second projectile configured to press, into an arc-extinguishing region of the accommodating space in which a coolant material is disposed, the cutoff portion cut off by the first projectile
Implementation Method 4
an arc-extinguishing region that is provided in the accommodating space and in which a coolant material is disposed, the arc-extinguishing region being configured to receive the cutoff portion after being cut off
Data Source
AI summary
An electric circuit breaker device includes: an igniter provided to a housing; a projectile disposed in an accommodating space formed in the housing, the projectile being to be projected along the accommodating space by energy received from the igniter; a conductor piece that is provided to the housing, forms a portion of an electric circuit, and includes in a portion thereof a cutoff portion disposed crossing the accommodating space and to be cut off by the projectile; and an arc-extinguishing region that is provided in the accommodating space and in which a coolant material is disposed, the arc-extinguishing region being configured to receive the cutoff portion after being cut off. The projectile includes a first projectile configured to cut off the cutoff portion from the conductor piece by being projected by the energy received from the igniter, and a second projectile configured to press, into the arc-extinguishing region, the cutoff portion cut off by the first projectile.