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 July 2024 was 78%. 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 in response to specific current flows. The predetermined percentage can range from 0% to 50%, with specific examples provided, such as a 10% increase above the transformer curve.
Additionally, the patent details the conditions under which the interrupting device will not operate, such as during cold load inrush and magnetizing inrush currents, by incorporating predetermined time delays. The method also accommodates various transformer ratings, allowing for the identification of groups of transformers with different power ratings. The operating curve for the interrupting device is set based on the transformer with the highest power rating in a group, and adjustments are made based on the measured load current. The patent specifies that the interrupting device can be a cut-out mounted device, a single-phase self-powered magnetically actuated recloser, or one that includes a vacuum interrupter, ensuring flexibility in application across different transformer types and configurations.
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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.
