Multi-Pole Circuit Breaker Shared Components
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Solution Overview
Problem
The existing market lacks multi-pole circuit breaker assemblies that can efficiently protect multiple branch circuits using shared components, leading to increased costs and complexity in stocking and managing multiple single-pole or two-pole circuit breakers, particularly for residential applications.
Innovation Solution
A multi-pole circuit breaker design featuring a single main housing with integrated sensors and a signal processor to detect fault conditions across multiple branch circuits, utilizing a shared tripping mechanism and common neutral conductor to reduce component count and enhance functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple single-pole or two-pole circuit breakers are used to protect multiple branch circuits, then fault detection and protection coverage is achieved, but cost and inventory complexity increase
Solution Approach 1:
The patent combines multiple circuit breakers into a single multi-pole circuit breaker assembly, where multiple poles share common components including the housing, sensors, signal processor, and tripping mechanism. This merging reduces the number of separate units from stores and simplifies inventory management while maintaining comprehensive fault detection and protection coverage across multiple branch circuits.
Solution Approach 2:
The multi-pole circuit breaker assembly performs multiple functions within a single device: it provides overcurrent protection, ground fault detection, and arcing fault detection across multiple branch circuits simultaneously. The shared sensors and signal processor universally monitor all poles, eliminating the need for separate dedicated breakers for each function and reducing overall system complexity.
2Reliability
If multiple separate circuit breakers are used, then comprehensive protection is provided, but cost increases due to multiple units
Solution Approach 1:
By merging multiple circuit breaker functions into a single assembly with shared components, the patent reduces material costs, manufacturing complexity, and assembly operations. The common housing, sensors, and control electronics are manufactured once and serve all poles, significantly reducing the cost compared to producing and assembling multiple separate circuit breaker units.
Solution Approach 2:
The multi-pole circuit breaker provides comprehensive protection coverage across multiple branch circuits through its universal design, where a single set of sensors and processing electronics monitors and protects all poles. This multi-functionality achieves the same protection coverage as multiple separate breakers at a lower cost due to component sharing and reduced manufacturing overhead.
3Reliability
If multiple circuit breakers are deployed, then fault detection capability is achieved, but device size and component count increase
Solution Approach 1:
The patent merges multiple fault detection systems into a single integrated unit, where sensors, signal processors, and tripping mechanisms are shared across all poles. This consolidation maintains comprehensive fault detection capability for all branch circuits while significantly reducing the total device volume compared to housing multiple separate circuit breaker units.
Solution Approach 2:
The multi-pole circuit breaker achieves comprehensive fault detection capability across multiple branch circuits through universal sensors and processing electronics that monitor all poles simultaneously. This multi-functional approach provides the same detection coverage as multiple separate breakers but in a more compact, space-efficient design.
Data Source
AI summary
A multi-pole circuit breaker comprising a single main housing containing multiple circuit breakers for protecting multiple branch circuits. Each of the circuit breakers comprises a single line terminal for receiving electrical current from a utility line, a plurality of load terminals for supplying electrical current from the single line terminal to a plurality of branch circuits via load lines, and a plurality of neutral terminals for receiving electrical current returned from the branch circuits via neutral lines Line conductors inside the main housing connect the line terminal to the plurality of load terminals. Sensors inside the main housing generate signals representing characteristics of the electrical current flow in the branch circuits, and a signal processor uses the signals generated by the sensors for detecting abnormal conditions in the branch circuits and generating trip signals in response to the detection of an abnormal condition. A single tripping mechanism between the line terminal and the load terminals receives the trip signals and interrupts the flow of current to the branch circuits in response to a trip signal.