Abstract
The article considers the partial discharges impact on busbars of voltage class 20 kV. The composition of a new type insulation includes a dusty inert material, which contributes to an increase in electrical strength. As a result of the tests carried out, the amplitude of partial discharges was recorded. It did not exceed the standard values. Also, areas of partial discharges high-amplitude values were recorded less than busbars without filler.
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