Circuit Breaker Fault Logic for Selective Load Disconnect Reset
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Solution Overview
Problem
Existing circuit interrupters, such as circuit breakers, often inefficiently handle fault conditions by tripping the entire system when a minor fault occurs, leading to unnecessary inefficiencies and inefficiencies in load management.
Innovation Solution
Implementing a smart monitoring system with nuanced fault logic that temporarily disconnects affected loads under low severity faults and automatically reconnects them if the fault resolves, while tripping the entire circuit breaker only under high severity conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic monitoring system is programmed to trip the entire circuit breaker under fault conditions, then safety and fault clearing are ensured, but system efficiency decreases due to unnecessary disconnection of all loads
Solution Approach 1:
The circuit breaker is divided into multiple independent disconnect mechanisms (main disconnect and load disconnects), allowing selective isolation of only the affected load rather than the entire system. This segmentation enables the system to maintain productivity by keeping unaffected loads connected while still ensuring reliability by isolating the fault.
2Reliability
If the circuit breaker is tripped to isolate the breaker from the power source, then fault conditions are cleared, but manual intervention is required for resetting causing loss of time
Solution Approach 1:
The load disconnect mechanisms are designed with automatic self-reset capability through spring-loaded contacts that automatically reclose after tripping. This eliminates the need for manual intervention to reset the disconnect, reducing loss of time while maintaining reliable fault clearing through the main breaker trip.
3Reliability
If the disconnect mechanisms are configured to trip the entire breaker, then comprehensive fault protection is achieved, but device complexity increases due to multiple disconnect mechanisms
Solution Approach 1:
The electronic monitoring system serves multiple functions: it monitors fault conditions, determines fault severity, controls selective disconnect tripping, and manages automatic self-reset operations. This multi-functionality allows comprehensive fault protection through a coordinated system rather than requiring separate complex mechanisms for each function.
Data Source
AI summary
A circuit breaker with at least one disconnect mechanism and a smart monitoring system implements nuanced fault logic in order to minimize disruption to operation of the circuit breaker under a fault condition, and enables the circuit breaker to address nuisance or low severity faults separately from load switching. Under low severity or nuisance fault conditions, the smart monitoring system temporarily disconnects affected loads from the power supply rather than tripping the entire circuit breaker so that the loads can be reconnected to the power supply if the fault condition resolves within a short amount of time. In addition, the disconnect mechanism(s) that are used to temporarily disconnect the load(s) are configured to be re-closed after opening without requiring manual intervention. In high severity fault conditions, the smart monitoring system actuates tripping of the entire breaker, requiring manual re-closing of the circuit breaker.