Modular High Voltage Sensing Unit Retrofit
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Solution Overview
Problem
Field upgrades of high voltage electrical equipment, such as overhead reclosers, are difficult and time-consuming due to the need for heavy and expensive retrofit devices that require additional support structures and complex cabling for voltage measurement and protection.
Innovation Solution
A modular high voltage sensing unit with a resistive voltage divider and connecting assembly that attaches directly to the high voltage switching device, eliminating the need for additional support brackets and simplifying the installation process by using an interface cable to connect to existing receptacles, allowing for lightweight and efficient voltage measurement and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional retrofit devices are used for high voltage equipment, then voltage measurement and protection functions are achieved, but the device weight increases and installation complexity increases
Solution Approach 1:
The sensing unit is divided into modular components: a housing containing the voltage divider, a connecting assembly with terminal, and an interface cable. This segmentation allows each component to be optimized independently and simplifies installation by eliminating the need for heavy integrated support structures.
Solution Approach 2:
The voltage sensing functionality is extracted from traditional heavy retrofit devices and implemented through a lightweight modular sensing unit that attaches directly to existing equipment terminals, removing the need for additional support brackets and complex mounting structures.
2Reliability
If traditional retrofit devices are used for high voltage equipment, then voltage measurement and protection functions are achieved, but installation time and complexity increase
Solution Approach 1:
The sensing unit is pre-assembled with the connecting assembly and interface cable integrated, allowing for quick installation by simply attaching the terminal to the equipment and plugging in the cable, eliminating time-consuming on-site assembly and configuration.
Solution Approach 2:
The modular design with standardized connecting assembly and interface cable allows the sensing unit to be universally installed on various high voltage equipment without requiring custom installation procedures, reducing installation complexity and time.
3Measurement precision
If traditional retrofit devices are used for high voltage equipment, then voltage measurement capability is provided, but device cost and structural complexity increase
Solution Approach 1:
The voltage divider is segmented into discrete resistive elements housed in a compact enclosure, with separate connecting and interface assemblies. This modular segmentation reduces structural complexity while maintaining measurement precision through standardized component interfaces.
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 rapid and cost-effective retrofitting of high voltage equipment with accurate voltage sensing capabilities, reducing installation complexity and operational costs while maintaining structural integrity and safety.
Implementation Method 1
A resistive voltage divider, including a primary resistor and a secondary resistor configured in series, may be included within the housing
Data Source
AI summary
A high voltage sensing unit includes a housing having an internal bore. A resistive voltage divider, including a primary resistor and a secondary resistor configured in series, is included within the housing. A connecting assembly is configured to attach the high voltage sensing unit to a terminal of a high voltage switching device. The connecting assembly provides an electrical connection from the high voltage switching device to the primary resistor and physically supports the high voltage sensing unit. An interface cable provides an electrical connection from the secondary resistor to a receptacle on the high voltage switching device, which can receive a voltage signal and pass the voltage signal to a controller using existing control wiring.