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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">pribor</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Приборостроение</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of Instrument Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3454</issn><issn pub-type="epub">2500-0381</issn><publisher><publisher-name>Национальный исследовательский университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/0021-3454-2023-66-3-223-233</article-id><article-id custom-type="elpub" pub-id-type="custom">pribor-94</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>ПРИБОРЫ И МЕТОДЫ КОНТРОЛЯ ПРИРОДНОЙ СРЕДЫ, ВЕЩЕСТВ, МАТЕРИАЛОВ И ИЗДЕЛИЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INSTRUMENTS AND METHODS FOR MONITORING THE NATURAL ENVIRONMENT, SUBSTANCES, MATERIALS AND PRODUCTS</subject></subj-group></article-categories><title-group><article-title>Модификация влагомера для усовершенствования электрохимического метода определения содержания воды в трансформаторном масле</article-title><trans-title-group xml:lang="en"><trans-title>Modification of the Moisture Meter to Improve the Electrochemical Method for Determining the Water Content in Transformer Oil</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лютикова</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyutikova</surname><given-names>М. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марина Николаевна Лютикова - канд. хим. наук, доцент; кафедра безопасности труда </p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Marina N. Lyutikova - PhD, Associate Professor; Department of Labor Safety</p><p>Novosibirsk</p></bio><email xlink:type="simple">m.lyutikova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ридель</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ridel</surname><given-names>А. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Викторович Ридель - канд. техн. наук, ст. научный сотрудник; кафедра безопасности труда</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Alexander V. Ridel - PhD, Senior Researcher; Department of Labor Safety; Senior Researcher</p><p>Novosibirsk</p></bio><email xlink:type="simple">ridel@corp.nstu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Новосибирский государственный технический университет</institution></aff><aff xml:lang="en"><institution>Novosibirsk State Technical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>26</day><month>11</month><year>2024</year></pub-date><volume>66</volume><issue>3</issue><fpage>223</fpage><lpage>233</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Национальный исследовательский университет ИТМО, 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Национальный исследовательский университет ИТМО</copyright-holder><copyright-holder xml:lang="en">Национальный исследовательский университет ИТМО</copyright-holder><license xlink:href="https://pribor.ifmo.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://pribor.ifmo.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://pribor.ifmo.ru/jour/article/view/94">https://pribor.ifmo.ru/jour/article/view/94</self-uri><abstract><p>Цель работы — модификация известного влагомера трансформаторного масла путем монтирования термостата на десорбционную колонку с возможностью подъема температуры и изучение степени полноты извлечения воды из матрицы масла. Принцип работы влагомера основан на электрохимическом методе, который включает в себя несколько последовательных этапов: извлечение молекул воды из матрицы масла сухим газом в десорбционной колонке при повышенной температуре, перенос парогазовой фазы сухим газом на чувствительный элемент и последующий электролиз воды. Мерой содержания воды в масле является сила тока, необходимая для электрического разложения воды, поглощенной в единицу времени. Модифицированный влагомер (десорбционная колонка с термостатом), в отличие от стандартного исполнения прибора (десорбционная колонка без термостата), позволяет измерять массовую долю воды в старых окисленных маслах из действующих высоковольтных трансформаторов с более высокой точностью. Результаты исследований показали, что нагрев пробы жидкого диэлектрика до 80 °С приводит к снижению вязкости трансформаторного масла. Данный факт способствует наиболее полному извлечению воды из матрицы изоляционной жидкости. Достоверное измерение массовой доли воды в жидком диэлектрике является одной из важных задач при диагностировании состояния изоляционной системы дорогостоящих высоковольтных трансформаторов.</p></abstract><trans-abstract xml:lang="en"><p>The purpose of the work is to modify the known transformer oil moisture meter by mounting a thermostat on the desorption column with the possibility of raising the temperature and to study the degree of completeness of water extraction from the oil matrix. The principle of operation of the moisture meter is based on the electrochemical method, which includes several successive stages: extraction of water molecules from the oil matrix by dry gas in a desorption column at elevated temperature, transfer of the vapor-gas phase by dry gas to a sensitive element, and subsequent electrolysis of water. A measure of the water content in oil is the current strength required for the electrical decomposition of water absorbed per unit time. The modified moisture meter (desorption column with thermostat), in contrast to the standard version of the device (desorption column without thermostat), allows one to measure the mass fraction of water in old oxidized oils from existing high-voltage transformers with higher accuracy. Results of performed research show that heating a liquid dielectric sample to 80 °C leads to a decrease in the viscosity of transformer oil. This fact contributes to the most complete extraction of water from the matrix of the insulating liquid. Reliable measurement of the mass fraction of water in a liquid dielectric is one of the important tasks in diagnosing the state of the insulation system of expensive high-voltage transformers.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>минеральное изоляционное масло</kwd><kwd>метод Карла Фишера</kwd><kwd>влагосодержание</kwd><kwd>электрохимический метод определения воды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mineral insulating oil</kwd><kwd>Karl Fischer method</kwd><kwd>moisture content</kwd><kwd>electrochemical method for water determination</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">исследование выполнено при поддержке Российского научного фонда, грант № 22-79-10198 (https://rscf.ru/project/22-79-10198/)</funding-statement><funding-statement xml:lang="en">the study was supported by the Russian Science Foundation, grant No. 22-79-10198 (https://rscf.ru/project/22-79-10198/)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Arakelian V. 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