Load-Side Voltage Sensing for Safe Remote Meter Reconnection
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Solution Overview
Problem
The remote reconnection of electrical power to a consumer's building without detecting load-side voltages can lead to damage to devices, circuits, and the electrical power meter, as well as potential electrical fires.
Innovation Solution
A load-side voltage detection module for a metrology device, which includes a voltage divider creating a reference voltage and a pulse generator to detect voltages above specific thresholds on load-side terminals, preventing the closure of the disconnect switch in the presence of a load-side voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If remote reconnection of electrical power is performed without load-side voltage detection, then utility restoration efficiency is improved and physical inspection is eliminated, but damage to electrical power meter and associated devices may occur
Solution Approach 1:
The system performs load-side voltage detection before allowing disconnect switch closure to restore power. The detection module checks for voltages above thresholds on load-side terminals, and only permits switch closure when no dangerous voltages are present, preventing damage while enabling remote operation
Solution Approach 2:
A load-side voltage detection module is introduced as an intermediary between the remote control system and the disconnect switch. This module detects load-side voltages and provides safety verification, allowing remote reconnection while preventing damage from undetected alternative power sources
2Reliability
If technician physical inspection is required to detect load-side voltages, then safety is improved by preventing damage to equipment, but operational complexity and time consumption increase
Solution Approach 1:
The electrical power meter performs self-inspection through an integrated load-side voltage detection module. The system automatically detects voltages on load-side terminals and determines whether disconnect switch closure is safe, eliminating the need for external technician inspection while maintaining safety
Solution Approach 2:
The manual physical inspection process by technicians is replaced with an automated electrical detection system. The detection module uses electrical measurements of load-side voltages to determine safety, substituting mechanical/physical inspection with electronic automation
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
The load-side voltage detection module ensures safe operation by preventing damage to utility meters and associated devices, reducing the risk of electrical incidents and accidents, and allowing for remote management of electrical power without physical inspection.
Implementation Method 1
a voltage divider creating a reference voltage
Data Source
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AI summary
A load-side voltage detection module for a metrology device includes a plurality of first resistors electrically coupled to a first load-side terminal, the first resistors being in series, a plurality of second resistors electrically coupled to a second load-side terminal, the second resistors being in series, a voltage divider electrically coupled between a first line-side terminal and a second line-side terminal, the voltage divider creating a reference voltage for the load-side voltage detection module, and a pulse generator to generate a pulse based on detection of voltage, the pulse indicating a voltage on at least one of the first load-side terminal or the second load-side terminal, above at least one threshold.