Ground Fault Circuit Breaker Remote Testing via Simulated Fault
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Solution Overview
Problem
GFCI circuit breakers often fail to be regularly tested due to remote accessibility issues, leading to potential hazards as they may be thought functional when not, despite the need for routine testing to ensure safety compliance.
Innovation Solution
A circuit interrupting device with a communication interface for remote testing and resetting, utilizing a processor to simulate faults and generate alarm signals for malfunctions, allowing for periodic automated testing and resetting without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GFCI circuit breakers are installed remotely or in confined locations, then circuit protection coverage is improved, but accessibility for routine testing deteriorates
Solution Approach 1:
The system enables self-service testing where the circuit breaker automatically performs self-diagnostics and reports its status remotely. The microcontroller periodically tests the trip mechanism and communicates results via the communication interface, eliminating the need for manual local testing while maintaining reliability.
Solution Approach 2:
The system implements feedback mechanisms where the circuit breaker continuously monitors its own operational status and communicates this information to remote locations. The communication interface transmits status signals that provide feedback on whether the breaker is functioning properly, allowing remote verification without physical access.
2Measurement precision
If manual testing procedures are required, then testing thoroughness is improved, but compliance consistency deteriorates
Solution Approach 1:
The microcontroller is programmed to perform automated testing at predetermined intervals, ensuring consistent compliance without relying on manual intervention. The system automatically initiates test sequences and records results, maintaining uniform testing standards across all installations regardless of location or user diligence.
Solution Approach 2:
The circuit breaker performs self-diagnostics automatically, testing its own trip mechanism and reporting status without requiring external verification. This self-service capability ensures that thorough testing occurs consistently according to programmed schedules, eliminating variability in compliance execution.
3Object-affected harmful factors
If remote control capability is added, then operational safety is improved, but device complexity increases
Solution Approach 1:
The communication interface and microcontroller serve multiple functions: they enable remote tripping, automated self-testing, status monitoring, and diagnostic reporting. By consolidating these diverse functions into a single integrated subsystem, the patent minimizes the increase in device complexity while maximizing operational safety and compliance capabilities.
Solution Approach 2:
The communication interface acts as an intermediary between the circuit breaker and external systems, allowing remote operation without requiring direct physical access or complex mechanical linkages. This intermediary approach enables safe remote control while keeping the internal breaker mechanism relatively simple and focused on its core tripping function.
Data Source
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AI summary
A circuit interrupting device 100 includes line and load terminals 116,118 and an interrupter 104, 106, 108 electrically coupled therebetween, the interrupter having open and closed conditions. The device also includes a fault detector 120 configured to detect a fault in an electrical signal in the load circuit. When such a fault is detected, the fault detector causes actuation of the interrupter to the open condition. A communication interface is adapted to receive a remote test command signal, and a processor generates, in response to receipt of the remote test command signal, a simulated fault in the load circuit, such that the fault detector attempts to cause actuation of the interrupter to the open condition. The processor determines whether or not the fault detector successfully caused actuation of the interrupter to the open condition in response to receipt of the remote test command signal, and if not, generates an alarm signal indicative of a malfunction.