FIELD: electric power engineering. SUBSTANCE: method allows diagnostics and test of insulation by means of higher voltage without destruction of insulation. Method peculiarity is in that cable is periodically charged, recharged to other polarity and charged additionally to compensate for voltage losses by generation of cosine-rectangular voltage with required periodicity, for example, 10 s by means of connection of cable conductors to electrostatic machine. EFFECT: improved test results. 3 dwg
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