Method for manufacturing cast polymer insulators

The two-stage manufacturing process for cast epoxy insulators with varying compound layers addresses insulation and mechanical weaknesses, enhancing electrical and mechanical strength while improving adaptability under varying conditions.

RU2864880C1Active Publication Date: 2026-06-30FEDERALNOE GOSUDARSTVENNOE BJUDZHETNOE OBRAZOVATELNOE UCHREZHDENIE VYSSHEGO OBRAZOVANIJA NATSIONALNYJ ISSLEDOVATELSKIJ UNIV MEHI FGBOU VO NIU MEHI
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Patent Information

Application Number
RU2026111372
Authority / Receiving Office
RU · RU
Patent Type
Patents
Current Assignee / Owner
Filing Date
2026-04-14
Publication Date
2026-06-30
Estimated Expiration
2046-04-14

AI Technical Summary

Technical Problem

Existing polymer insulators for high and ultra-high voltage applications suffer from insufficient electrical insulation, mechanical characteristics, and dielectric strength due to gas inclusions and delamination issues, limiting their reliability and adaptability under various operating conditions.

Method used

A two-stage manufacturing process for cast epoxy insulators using different epoxy compound layers with varying compositions and incomplete curing stages, combined with vacuum casting and controlled heating, ensures strong interlayer bonding and tailored electrical and mechanical properties.

Benefits of technology

The method enhances electrical and mechanical strength, reduces operating electric field strengths, and improves adaptability to diverse operating conditions by ensuring high-quality bonding between layers, thereby increasing the reliability of insulators.

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Abstract

FIELD: electrical engineering.SUBSTANCE: invention relates to a method for producing polymer insulators by casting. The method includes curing the insulating material in at least two stages. An epoxy compound is used as an insulating material, the hot curing of which is carried out sequentially with the formation of one or two intermediate layers and one finishing layer. For the intermediate and final layers, different compounds with different compositions are used, but with the same binder – epoxy resin. For each intermediate layer, the compound is partially cured at a temperature of 120 °C for 5 hours, and for the final layer, and the compound is completely cured at a temperature of 120 °C for at least 15 hours.EFFECT: reduction in the operating electric field strength in insulators, an increase in their electrical and mechanical strength, and the possibility of operation in various conditions.1 cl, 3 dwg, 3 ex
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Citation Information

Patent Citations

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    CN102543325B

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    EP2715744B1

  • Polymeric insulator manufacturing process

    RU2143147C1

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    RU2170465C1

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    RU2233492C2