Анотація
Показано, что при анализе процессов появления свободной влаги в полимерной изоляции силовых кабелей целесообразно применять высокочастотную релаксационную спектроскопию. Приведены расчетные и экспериментальные частотные зависимости тангенса угла диэлектрических потерь от степени увлажнения изоляции кабелей. Выявлено, что при длительном ее увлажнении пики релаксационных потерь смещаются в область более высоких частот и возникают дополнительные максимумы, соответствующие рассеянию энергии на новых элементах изоляции. Диапазон изменения частоты релаксационных потерь зависит от концентрации свободной влаги в изоляции и ее электрофизических и морфологических свойств. Библ. 19, табл. 1, рис. 5.
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