S&C Electric has been granted a patent for a method to optimize the time-current characteristic (TCC) operating curve for electronic interrupting devices protecting distribution transformers. This method involves establishing a TCC curve based on stabilized transformer operation and defining an operating curve that indicates response times to overcurrent conditions. GlobalData’s report on S&C Electric gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on S&C Electric, was a key innovation area identified from patents. S&C Electric's grant share as of June 2024 was 77%. Grant share is based on the ratio of number of grants to total number of patents.
Optimized tcc operating curve for electronic interrupting devices
The patent US12046891B2 outlines a method for determining the operational response of an electronic interrupting device in a power distribution network, specifically for protecting transformers from overcurrent conditions. The method involves establishing a time-current characteristic (TCC) transformer curve that indicates the permissible operational current once the transformer is stabilized. An operating curve is then defined, which includes points along the transformer curve plus a predetermined percentage, indicating the response time for the interrupting device to activate based on current flow. The predetermined percentage can range from 0% to 50%, with specific examples provided, such as a 10% increase. The method also details response times for various current levels, ensuring that the interrupting device operates effectively without interfering during cold load inrush or magnetizing inrush currents.
Additionally, the patent describes a method for managing multiple transformers with varying power ratings. This involves categorizing transformers into groups based on their power ratings and defining operating curves for the interrupting device that correspond to the highest power rating within each group. The method allows for real-time adjustments to the operating curve based on measured load currents, ensuring that the interrupting device responds appropriately to changing conditions. The electronic interrupting devices mentioned include cut-out mounted devices, single-phase self-powered magnetically actuated reclosers, and those equipped with vacuum interrupters, all aimed at enhancing the reliability and safety of power distribution systems.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
