Electric Meter Gas Sensor for Arc Detection
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Solution Overview
Problem
The challenge is to automatically and promptly detect electrical arcs in electric meter sockets, which can lead to overheating, loss of connection, and potential fires, posing a financial risk to both utility companies and end-users due to the inability to promptly identify and mitigate arcing issues.
Innovation Solution
An electric meter equipped with a gas sensor positioned near the blades to detect gaseous compounds resulting from arc discharges, generating an output signal when concentrations exceed a threshold, triggering an alert signal to be sent to the advanced metering infrastructure, allowing for prompt corrective action such as retightening contacts or disconnecting the meter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas sensor is added to detect arc discharges, then arc detection capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical/electrical inspection methods with a gas sensor-based detection system. The gas sensor detects gaseous byproducts of arc discharges (such as nitrogen oxides) chemically, substituting complex electrical monitoring mechanisms with a simpler gas detection approach that provides reliable arc detection.
Solution Approach 2:
The patent introduces gaseous byproducts as an intermediary indicator between the arc discharge and the detection system. Instead of directly detecting the complex electrical arc phenomenon, the system detects the chemical byproducts (nitrogen oxides) that result from arc discharges, providing a simpler and more reliable detection mechanism.
2Measurement precision
If manual inspection of meter sockets is performed, then detection accuracy is improved, but time consumption increases
Solution Approach 1:
The patent enables the meter socket system to self-diagnose arc discharges through continuous gas sensing. The system automatically detects gaseous byproducts and triggers alerts without requiring manual inspection, allowing the system to monitor itself continuously and reduce both time consumption and potential safety risks associated with manual handling of hot sockets.
Solution Approach 2:
The gas sensor provides continuous monitoring of the meter socket environment, continuously detecting gaseous byproducts of arc discharges. This continuous detection capability eliminates the intermittent nature of manual inspections, ensuring that arcs are detected as soon as they occur without time loss.
3Reliability
If manual inspection of hot sockets is performed, then detection capability is improved, but safety risks increase
Solution Approach 1:
The patent uses gaseous byproducts as an intermediary indicator to detect arc discharges safely. Instead of directly exposing inspectors to hot sockets and potential arc discharges, the system detects the chemical byproducts (nitrogen oxides) that result from arcs, providing detection capability while eliminating the safety risks associated with manual inspection of hot components.
Solution Approach 2:
The patent replaces manual mechanical inspection with an automated gas sensing system. The gas sensor continuously monitors for arc byproducts without requiring human presence near hot sockets, eliminating safety risks while maintaining reliable detection capability through continuous chemical monitoring.
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
Enables early detection and mitigation of arcing, preventing overheating and potential fires by automatically alerting utility companies to take corrective measures, thereby reducing financial risks and ensuring safer electrical connections.
Implementation Method 1
A gas sensor is positioned in a location proximate to the blades for sensing at least one gaseous compound product resulting from an arc discharge across the air involving the blades
Implementation Method 2
If sufficient energy is supplied to the gas, its atoms or molecules can break apart (ionize) into charged particles
Implementation Method 3
The heat resulting from an arc can create sufficient heat to in some cases where there is an adjacent flammable material to lead to a fire at the premises
Data Source
AI summary
An electric meter includes a meter shell configured to be within an outer utility box. A meter socket and blades are for coupling to openings of the socket. The openings include utility-side and premises-side openings for the blades to extend into. A meter processor is coupled to measurement circuitry, and to a communications unit including a transceiver. A gas sensor is positioned proximate to the blades for sensing ≥1 gaseous compound product resulting from an arc discharge across air involving the blades. During operation of the electric meter, responsive sensing a presence of the gaseous compound product, the gas sensor generates an output signal. Responsive to the output signal being above a predetermined threshold level, the electric meter triggers an alert signal that is transmitted to an advanced metering infrastructure (AMI) which indicates an identity of the electric meter and that the electric meter had experienced the arc discharge.