MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202647089158 A) filed by Hitachi Energy Ltd on July 22, 2026, for Dielectric Heating Method For Moisture Extraction From An Active Part Of A Transformer.

Inventors include Mukherjee, Pritam; Sand, Ulf; Bel Fdhila, Rebei; and Bormann, Dierk.

The application for the patent was published on July 31, 2026, under issue no. 31/2026.

Abstract: A dielectric heating method for moisture extraction from an active part (10) of a transformer (1) is provided. The method comprises a step of configuring a system including at least one an apparatus (2) configured to generate electric fields alternating at radio frequencies, wherein the electric fields penetrate at least part of regions between freely selectable electrodes (3). The method further comprises a step of operating the at least one apparatus (2) for drying at least one moist region (7) of the active part (10) of the transformer (1), wherein the at least one moist region (7) is located at least partially between the freely selectable electrodes ( 3 ), so that the at least one moist region (7) is exposed to the generated alternating electric fields, resulting in heat generation within the at least one moist region ( 7 ).

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