High voltage solid insulated capacitive-resistive divider

The capacitive voltage divider with solid dielectric material addresses environmental and safety issues of conventional CVTs, offering accurate power quality monitoring and harmonic measurement in a cost-effective, non-hazardous design.

WO2025184644A1 Publication Date: 2025-09-04HUBBELL INC
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Patent Information

Application Number
PCT/US2025/018083
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-01
Filing Date
2025-03-03
Publication Date
2025-09-04

AI Technical Summary

Technical Problem

Conventional capacitive voltage transformers (CVTs) used in electrical power grids face issues such as environmental hazards from liquid or gaseous dielectrics, flammability, explosiveness, accuracy drift due to capacitive condensers, and inability to measure harmonics without peripheral equipment.

Method used

A capacitive voltage divider using a solid dielectric material, such as solid foam or gel, which eliminates the need for hazardous dielectrics and incorporates a non-flammable, non-explosive design with integrated capacitive-resistive components to measure harmonics.

Benefits of technology

The solution provides a safe, accurate, and cost-effective means to step down high voltages while monitoring power quality, eliminating environmental risks and enhancing structural integrity with solid dielectrics that adhere to components, supporting harmonics measurement without additional equipment.

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Abstract

A capacitive voltage divider designed to step down high-voltage from an electrical power line to a lower more suitable voltage includes a hollow insulator, a primary terminal located on the hollow insulator and connected to the high-voltage power line, first and second capacitors arranged as a voltage divider circuit, one or more primary insertion resistors, and solid dry foam dielectric formed around the first capacitor and the second capacitor within the hollow insulator.
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