Browsing by Author "Cuenca Morales, Wilmer Rene"

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    Implementación de un módulo de protecciones de sobrecorriente mediante el uso del relé sel 351 para el laboratorio de protecciones eléctricas de la Universidad Técnica de Cotopaxi
    (Universidad Técnica de Cotopaxi (UTC). Ciencias de la Ingeniería y Aplicadas. Electricidad, 2026-10-14) Cuenca Morales, Wilmer Rene; Freire Freire, Armando Salvador
    The primary objective of the technological proposal was to implement an overcurrent protection module using SEL-351 relay for laboratory protection at Technical University of Cotopaxi. The methodology involved applied research, based on documentary, technical, and experimental procedures; regulatory criteria and the fundamentals of ANSI 50 and ANSI 51 functions were reviewed; a nine-bus electrical system was modeled in DIgSILENT PowerFactory; load currents and CT transformation ratios were analyzed; and finally, the settings were configured and transferred to the relay using ACSELERATOR QuickSet. The results determined normal currents of 339 A, 235 A, and 260 A for loads A, B, and C. For ANSI 51, secondary settings of 5.50 A, 5.09 A, and 5.67 A were established, with margins of 29.79%, 29.96%, and 30.85% relative to normal operation, using U3-U.S. Very Inverse Tpset characteristic of 0.50. For ANSI 50, secondary settings of 28.20 A, 35.76 A, and 40.91 A were configured, with a Tset of 0.00 s. Serial communication with SEL-351 was established using ACSELERATOR QuickSet, allowing Group 1 to be read, edited, and transferred. It was concluded that the developed parameterization adequately distinguishes between normal operation, time-delayed operation, and high-current operation, and links the results obtained in PowerFactory with the relay physical configuration, providing a technical tool for electrical protection practices. Furthermore, the module enhances practical training in configuration and analysis of digital protection systems Keywords: Protection settings, ANSI 50/51, electrical loads, SEL-351 relay, overcurrent.