Modular Circuit Breaker Sub-Poles Arc Management
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Solution Overview
Problem
Circuit breakers face limitations in current carrying capability, particularly in high current situations, due to electrodynamic repulsion forces and arc quenching, which affect their performance in protecting equipment from overcurrent conditions.
Innovation Solution
The implementation of a modular circuit breaker system with sub poles enclosed in individual chambers, each equipped with arc chutes to manage and quench arcs, allowing for increased current carrying capacity and improved arc management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit breaker is designed to withstand high currents, then the current carrying capability is improved, but the electrodynamic repulsion forces increase
Solution Approach 1:
The circuit breaker is divided into multiple independent sub-poles (first sub-pole, second sub-pole, third sub-pole, fourth sub-pole), each handling a portion of the total current. This segmentation reduces the electrodynamic repulsion forces on each individual pole while maintaining the overall high current carrying capability of the system.
2Reliability
If the circuit breaker handles high currents, then the current capability is improved, but arc quenching becomes more difficult
Solution Approach 1:
Each sub-pole is equipped with its own arc chute assembly, dividing the arc management function into separate units. This allows each arc chute to handle the arc generated by its corresponding sub-pole independently, making arc quenching more effective even at high current levels.
Solution Approach 2:
Arc chutes are introduced as intermediary components between the contacts and the external environment. These arc chutes provide a controlled path for arc discharge and facilitate arc quenching through multiple arcs and heat dissipation, effectively managing the harmful arc effects during high current operation.
3Device complexity
If multiple poles are arranged in a compact multipole configuration, then the device complexity is reduced, but the current carrying capability is limited
Solution Approach 1:
The multipole circuit breaker is segmented into four independent sub-poles, each capable of withstanding significant current. This segmentation allows the compact multipole configuration to achieve higher overall current carrying capability while maintaining structural compactness and manageable complexity.
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
This configuration enhances the circuit breaker's ability to handle high currents by effectively managing arcs and reducing the impact of electrodynamic forces, thereby increasing its current carrying capability and reliability in fault conditions.
Implementation Method 1
a plurality of arc chutes, each installed on one of the chambers enclosing the circuit breaker sub poles
Implementation Method 2
effectively managing arcs and reducing the impact of electrodynamic forces
Implementation Method 3
be able to withstand the large electrodynamic repulsion forces generated by the current flow
Data Source
AI summary
An apparatus includes an enclosure, a plurality of circuit breaker sub poles, each enclosed within a chamber of the enclosure, and a plurality of arc chutes, each installed on one of the chambers enclosing the circuit breaker sub poles.