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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2026-28-1-42-53</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-3754</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭЛЕКТРОТЕХНИЧЕСКИЕ КОМПЛЕКСЫ И СИСТЕМЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ELECTROTECHNICAL COMPLEXES AND SYSTEMS</subject></subj-group></article-categories><title-group><article-title>Моделирование температуры нагрева контактов низковольтных коммутационных аппаратов с учетом режимов эксплуатации</article-title><trans-title-group xml:lang="en"><trans-title>Modeling of contact heating temperature of lowvoltage switching devices with regard to operating modes</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-4497-4807</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Петров</surname><given-names>А. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrov</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Петров Алмаз Радикович – аспирант кафедры «Электроснабжение промышленных предприятий»</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Almaz R. Petrov</p><p>Kazan</p></bio><email xlink:type="simple">petroval13@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5379-847X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Грачева</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gracheva</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Грачева Елена Ивановна – д-р техн. наук, профессор кафедры «Электроснабжение промышленных предприятий»</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Elena I. Gracheva</p><p>Kazan</p></bio><email xlink:type="simple">grachieva.i@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный энергетический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Power Engineering University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>28</day><month>03</month><year>2026</year></pub-date><volume>28</volume><issue>1</issue><fpage>42</fpage><lpage>53</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Петров А.Р., Грачева Е.И., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Петров А.Р., Грачева Е.И.</copyright-holder><copyright-holder xml:lang="en">Petrov A.R., Gracheva E.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.energyret.ru/jour/article/view/3754">https://www.energyret.ru/jour/article/view/3754</self-uri><abstract><p>АКТУАЛЬНОСТЬ. В работе представлен алгоритм оценки температуры контактов аппаратов низкого напряжения на основе регрессионного анализа.ЦЕЛЬ. Разработка регрессионных моделей для определения температуры контактов автоматических выключателей, контакторов и магнитных пускателей. МЕТОДЫ. Проверка полученных моделей была проведена критерием Кохрена и Фишера, а также была оценена значимость каждого из коэффициентов критерием Стьюдента.РЕЗУЛЬТАТЫ. Были построены графические зависимости для определения температуры нагрева контактов аппаратов для ряда значений номинальных токов при температуре окружающей среды 40°C. Также построены графики для исследуемых аппаратов при изменении температуры окружающей среды от 5°C до 40°C. Построенные графики позволяют определить значение температуры нагрева без проведения предварительных расчетов для автоматических выключателей на номинальные токи 40А, 63А, 100А, 160А, 250А и для контакторов и магнитных пускателей на номинальные токи 40А, 63А, 100А, 250А, 400А. Полученные значения температуры нагрева контактов были сопоставлены с ГОСТ 403-73.ЗАКЛЮЧЕНИЕ. Модели для определения температуры нагрева контактов позволяют учитывать техническое состояние аппарата и легко могут быть изменены при изменении условий и режимов эксплуатации.</p></abstract><trans-abstract xml:lang="en"><p>RELEVANCE. The paper presents an algorithm for measuring the temperature of minimum voltage devices based on regression analysis. THE PURPOSE. Development of regression models for determining the contact temperature of circuit breakers, contactors and magnetic starters.METHODS. The obtained models were validated by Cochran and Fisher's criterion and the significance of each of the coefficients was assessed by Student's criterion.RESULTS. Graphical dependences for determining the contact heating temperature of the apparatuses for a number of values of rated currents at an ambient temperature of 40°C were plotted. The graphs were also constructed for the investigated devices when the ambient temperature changes from 5°C to 40°C. The constructed graphs allow to determine the value of heating temperature without preliminary calculations for circuit breakers for rated currents 40A, 63A, 100A, 160A, 250A and for contactors and magnetic starters for rated currents 40A, 63A, 100A, 250A, 400A. The obtained values of contact heating temperature were compared with GOST 403-73.CONCLUSIONS. Models for determining the contact heating temperature allow the technical condition of the apparatus to be taken into account and can easily be modified when conditions and operating modes change.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>низковольтная сеть</kwd><kwd>коммутационный аппарат</kwd><kwd>контактное соединение</kwd><kwd>нагрев контактов</kwd><kwd>регрессионный анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>low-voltage network</kwd><kwd>switching device</kwd><kwd>contact connection</kwd><kwd>contact heating</kwd><kwd>regression analysis</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Абдуллазянов Э.Ю., Грачева Е.И., Альзаккар А., Низамиев М.Ф., Шумихина О.А., Valtchev S. Прогнозирование и анализ электропотребления и потерь электроэнергии на промышленных объектах // Известия высших учебных заведений. 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