FIELD: electric measurements. SUBSTANCE: device incorporates source of testing voltage, reference resistor, discharge resistor, output terminals, charging key, discharging key, scale voltage converter, voltmeter and two-position switch. Device is supplemented with additional resistor, two-pole switch, voltage divider, potentiometer, summing amplifiers, tracking and storage unit and indicator. EFFECT: expanded functional capabilities thanks to detection of partial discharges in insulation. 1 dwg
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