DC Leakage Current Meter for Energized Power Lines
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Solution Overview
Problem
Existing technologies lack a satisfactory method for measuring Direct Current (DC) on energized DC electrical transmission and distribution power lines, as AC meters and techniques are not effective for DC high voltage power lines.
Innovation Solution
A DC meter apparatus that includes a DC current measuring device, a numerical display, an audio speaker, and optional components such as a manual or automatic DC voltage class selector switch, graphical display, and an elongate electrically insulating structure for safe measurement of DC leakage current on energized DC power lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If AC meters and techniques are used on DC high voltage power lines, then the existing measurement equipment can be utilized, but the measurement is not effective or accurate for DC current
Solution Approach 1:
The patent applies parameter changes by designing a measurement system specifically tuned for DC parameters rather than AC parameters. The meter is configured with DC-optimized circuitry including DC voltage dividers, DC current measurement circuits, and threshold detection circuits that respond to DC characteristics. This allows the equipment to accurately measure DC leakage current while maintaining adaptability to high voltage DC environments through programmable voltage range selection.
2Productivity
If workers service energized DC power lines using insulated platforms, then maintenance efficiency is improved, but the risk of electrical flashover increases without proper DC current monitoring
Solution Approach 1:
The patent implements feedback through real-time monitoring of DC leakage current through the insulated platform and providing immediate visual and audible alerts when threshold values are exceeded. The system continuously measures the current and compares it against pre-set safety thresholds, providing feedback to workers about the safety status of their operations. This allows maintenance workers to service energized lines efficiently while maintaining safety through continuous monitoring and immediate warning signals.
Solution Approach 2:
The measurement system acts as an intermediary between the workers and the hazardous electrical environment. By measuring leakage current through the insulated platform and providing safety information, the system mediates the interaction between workers and high voltage DC lines, enabling safe operation in previously hazardous conditions.
3Adaptability or versatility
If multiple measurement and display components are integrated into the DC meter, then the functionality and safety monitoring capability are improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated DC meter device. The system combines high voltage DC measurement capability, leakage current measurement through insulated platforms, multiple display outputs (visual and audible), and programmable threshold detection all within one portable device. This integration reduces the need for multiple separate instruments while providing comprehensive safety monitoring functionality.
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 apparatus effectively measures DC leakage current on energized DC power lines, providing visual, auditory, and graphical feedback to ensure safe working conditions and prevent electrical flashovers.
Implementation Method 1
a DC current measuring device to measure a DC leakage current from the energized DC electrical power line
Data Source
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AI summary
An apparatus and method measures and analyzes DC current passing through a substantially insulating member or dielectric material that is electrically connected to, or otherwise conductive, between an energized DC electrical transmission line and an Earth potential or ground. An apparatus may utilize a DC current measuring device, a DC voltage level selection switch, a DC display, a graphical display of momentary leakage current, and an audio speaker. A process may entail extending a substantially insulating member or dielectric material between an energized DC electrical transmission line and an Earth potential, detecting a DC momentary leakage current, using a DC momentary leakage current meter to measure DC current through the member or material, and a computer to analyze and compare the DC current, and deliver results or a warning that the DC current has reached a threshold value.