HV Impedance Device Surface Leakage Proof Configuration
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Solution Overview
Problem
High voltage impedance devices experience leakage current in humid or dusty environments, leading to non-linear voltage measurements due to parasitic resistance, which limits their application and requires a bulky design to maintain linearity.
Innovation Solution
A high voltage impedance device with a surface leakage proof configuration, featuring an inner and outer insulating case with inert gas-filled interlayers, preventing leakage current and maintaining linearity while reducing the device's height and improving portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the length of HV divider is increased to prevent surface leakage current and maintain linearity, then measurement linearity is improved, but device portability and ease of movement deteriorate
Solution Approach 1:
The patent introduces an intermediary substance (inert gas) between the inner case and outer case to prevent surface leakage current. This allows the device to maintain measurement linearity without requiring increased length, as the inert gas fills the gap and eliminates the leakage path that would otherwise necessitate longer design
Solution Approach 2:
The patent creates an inert atmosphere by filling the gap between inner and outer cases with inert gas. This inert environment prevents surface leakage current on the insulator surface, allowing compact design while maintaining measurement accuracy and linearity
2Ease of operation
If the height of HV divider is reduced for compact design, then ease of movement is improved, but surface leakage current increases causing non-linear measurements
Solution Approach 1:
The inert gas acts as an intermediary that prevents surface leakage current even in compact designs. By filling the gap between cases, it eliminates the leakage path that would otherwise be present in shortened designs, allowing reduced height without sacrificing measurement linearity
3Measurement precision
If resistance of external environment is increased to prevent leakage current, then measurement linearity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of complicating the insulator structure to increase external resistance, the patent uses a simpler approach by introducing inert gas into the gap. This creates a controlled environment that prevents surface leakage without requiring complex insulator designs or additional structural elements
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 solution effectively eliminates surface leakage current, ensuring linearity of voltage measurements and reducing the device's height, making it more convenient for use and application without compromising measurement accuracy.
Implementation Method 1
the inner case and the outer case are insulators between which some interlayers with inert gas filled inside are developed and sealed for isolation
Data Source
AI summary
A high voltage impedance device with surface leakage proof configuration is applied in a divider. Aforementioned divider is assembled by a high impedance element, an inner case body and an outer case body. The high impedance element is sealed in the inner case body and a closed interlayer between the inner case body and the outer case body is filled with noble gas as an insulating layer. While the high impedance element is applied in high voltage, the closed interlayer can prevent the current-leakage from forming impedance paralleled with the high impedance element. The current-leakage is formed on the surface of insulting portion, or is formed by moisture, dust or corona effect. Therefore, the current-leakage proof divider may maintain the stability/linearity of the voltage division and then reduce the distance between two ends of the high impedance element effectively and still maintain the linearity of measuring voltage.