FIELD: electrical engineering. SUBSTANCE: invention refers to testing of high-voltage insulation of electrical equipment. Device includes trusting step-up transformer, audio generator connected to unit of amplifiers which outputs are linked to low-voltage winding of testing step-up transformer, reactive element placed in parallel to winding. Circuit of high-voltage winding of testing step-up transformer is inserted with high-voltage element equal by measurement frequency placed in parallel to tested reactive element. EFFECT: enhanced efficiency of testing. 1 dwg
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