FIELD: electrical engineering. SUBSTANCE: for generator state diagnosis and trouble kind determining generator exiting winding is fed by alternating current and generator output signal is compared with standard one by Lissajous figure picture examining by oscilloscope. Device has oscilloscope with signal and timebase amplifiers, variable and load resistors connected in such a manner that timebase amplifier is connected to transformer secondary winding by variable resistor but load resistor is connected to output terminals of generator under diagnosis. EFFECT: simpler method of alternating current generator diagnosis. 2 cl, 2 dwg
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