Branch Circuit Verification Using Controlled Breaker Tripping
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Solution Overview
Problem
Conventional methods for de-energizing circuit breakers are not always reliable, leading to potential safety hazards as they may not accurately confirm the de-energization of electrical circuits, and existing techniques can be time-consuming or generate excessive heat, causing unnecessary stress on wiring and circuit breakers.
Innovation Solution
A system and method utilizing sensors and power semiconductor devices to collect and evaluate data on electrical branch circuits, ensuring the circuit breaker is safely opened by applying loads within predetermined parameters, using high power resistive elements and semiconductor devices to control fault currents and verify de-energization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional manual methods are used to clear circuit breakers, then the process is simple to operate, but the reliability of de-energization verification is insufficient
Solution Approach 1:
The patent replaces manual mechanical verification methods with an automated electronic verification system. The system uses sensors to detect electrical parameters (voltage, current) and automatically determines whether the circuit is de-energized, eliminating reliance on manual visual inspection or simple indicator lights. This substitution significantly improves verification reliability while the automated nature reduces operational complexity for the user.
Solution Approach 2:
The verification system continuously monitors electrical parameters and provides real-time feedback about the circuit state. Sensors detect voltage and current levels, and the system processes this information to provide definitive verification of de-energization status. This closed-loop feedback mechanism ensures reliable verification by continuously checking circuit conditions rather than relying on static indicators.
2Reliability
If manual loading techniques are used to clear circuit breakers, then the circuit breaker can be forced to open, but excessive heat is generated causing stress on wiring
Solution Approach 1:
The system precisely controls the loading parameters (current magnitude, duration, waveform) applied to force the circuit breaker to open. By optimizing these parameters, the system generates sufficient heat to trip the thermal element of the circuit breaker while limiting total energy input to prevent excessive temperature rise that would stress wiring. The controlled nature of parameter changes ensures reliable clearing without damaging the circuit.
Solution Approach 2:
The system applies just enough load to reliably clear the circuit breaker without excessive overloading. Rather than applying extreme currents that would guarantee breaker opening but cause damage, the system uses calculated partial loading that achieves the clearing function with minimal heat generation. This balanced approach ensures reliable operation while protecting circuit integrity.
3Productivity
If direct short circuiting is used to clear circuit breakers, then the breaker opens quickly, but sparks and fires can occur causing injury
Solution Approach 1:
The system introduces controlled resistive loading as an intermediary method between the energized circuit and the circuit breaker, rather than directly short-circuiting. This intermediary approach creates a controlled current path that generates sufficient heat to trip the breaker without the violent arcing and sparking associated with direct short circuits. The intermediary loading element dissipates energy safely, eliminating fire and injury hazards while maintaining clearing effectiveness.
4Measurement precision
If electricians manually verify each outlet location, then accuracy can be confirmed, but significant time is lost traveling between breaker panel and outlets
Solution Approach 1:
The verification system performs automatic monitoring and confirmation of de-energization status without requiring the electrician to physically visit each outlet. Sensors installed at strategic locations continuously monitor circuit conditions, and the system automatically verifies that downstream outlets are de-energized based on electrical parameter detection. This self-service capability eliminates time-consuming manual traversal while maintaining verification accuracy through automated electrical measurement.
Solution Approach 2:
The system replaces the mechanical process of physical inspection and travel with automated electrical sensing and remote verification. Instead of an electrician walking to outlets to check switches or indicators, the system uses sensors to detect electrical presence/absence and communicates verification status remotely. This substitution eliminates travel time while maintaining measurement precision through electronic detection methods.
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
Ensures accurate and safe de-energization of electrical circuits, reducing the risk of injury and preventing unnecessary heat buildup, while allowing for efficient verification and operation on electrical branch circuits.
Implementation Method 1
high power resistive elements and semiconductor devices to control fault currents
Implementation Method 2
sensors and power semiconductor devices to collect and evaluate data on electrical branch circuits
Implementation Method 3
The circuit breakers are designed to clear or switch to an open state when a fault condition occurs... an instantaneous surge current that generates a magnetic field
Data Source
AI summary
The present disclosure is directed to methods and apparatus that may collect information relating to a group of electrical power distribution wires, commonly referred to as an electrical branch circuit. Such methods can controllably cause a circuit breaker to open (clear) while keeping the branch circuit loaded within a predetermined set of parameters or specifications. Apparatus consistent with the present disclosure may use multiple high power resistive elements of different resistance values that are selectively connected to the branch circuit in a manner that provides a configurable limit to an available fault current when data relating to the branch circuit are collected and evaluated. Such methods can provide a positive indication to an electrician that allows the electrician to know that a particular electrical circuit has been de-energized before the electrician works on that particular electrical circuit.