Leakage Current Limiting Device for Power Transmission Lines
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Solution Overview
Problem
Existing technologies fail to effectively minimize leakage current from power transmission lines, which poses a risk of electric shock to humans, as they do not adequately address the reduction of leakage current to safe levels.
Innovation Solution
A leakage current limiting device with a non-conductor of rectangular parallelepiped shape, featuring conductors with varying sectional areas connected between phase, neutral, and ground lines, which redirects leakage current away from humans to the ground, thereby reducing the risk of electric shock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional power transmission lines are used without special conductor configuration, then the structure is simple and installation is easy, but leakage current flows to ground through human body causing electric shock risk
Solution Approach 1:
The patent applies local quality by making the neutral conductor have a larger cross-sectional area than the phase conductors. This localized difference in conductor properties creates a preferential path for leakage current through the neutral conductor to ground, protecting humans without requiring complete system redesign.
Solution Approach 2:
The neutral conductor acts as an intermediary element that provides a controlled path for leakage current. By designing the neutral conductor with larger cross-sectional area, it serves as a mediator that safely channels leakage current away from human contact points to the ground.
2Object-affected harmful factors
If conductors with equal cross-sectional areas are used, then the manufacturing and installation is simpler, but leakage current cannot be effectively limited to safe levels
Solution Approach 1:
The patent implements local quality by specifying different cross-sectional areas for different conductors. The neutral conductor has a larger cross-sectional area (at least twice, preferably four times) than phase conductors, creating a localized property difference that effectively limits leakage current while maintaining relatively simple manufacturing.
3Object-affected harmful factors
If the neutral conductor has larger cross-sectional area than phase conductors, then leakage current is effectively limited, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality by making the neutral conductor have a larger cross-sectional area than the phase conductors. This localized difference in conductor properties creates a preferential path for leakage current through the neutral conductor to ground, protecting humans without requiring complete system redesign.
Solution Approach 2:
The patent changes the physical parameter of conductor cross-sectional area to control leakage current. By setting the neutral conductor area to be at least twice (preferably four times) the phase conductor area, the patent modifies this parameter to achieve effective leakage current limitation while maintaining practical manufacturability.
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 device efficiently limits leakage current by utilizing conductors with larger sectional areas to divert current away from humans, reducing the risk of electric shock and ensuring safety by redirecting it to the ground, thus preventing harm.
Implementation Method 1
a first conductor (141) installed on the first surface of the non-conductor (110) having a rectangular parallelepiped shape and connected between the first input terminal (121) and the first output terminal (131); a second conductor (142) which is installed on the second surface of the non-conductor (110) having a rectangular parallelepiped shape and connected between the second input terminal (122) and the second output terminal (132)
Data Source
Figure 1
Figure 2
Figure 3(a)~3(c)
AI summary
The present disclosure relates to a leakage current limiting device for a power transmission line in which a leakage current leaking to the outside through the power transmission line may be limited using the leakage current limiting device for a power transmission line which is simple in structure and easy to install, so that a risk of electric shock may be reduced.