FIELD: measuring equipment engineering.
SUBSTANCE: device consists of current transformer, connected to stator circuit of electric engine, and measuring circuit with threshold device and rectifier. Measuring circuit additionally contains scale resistor, resistor optic pair, synchronization device, output of which is connected to outputs of light diode of resistor optic couple, and operation amplifier, into check connection circuit of which photo-resistor of optic pair is installed. Output of current transformer is connected to input of rectifier, output of which is connected directly and via scale resistor respectively to inputs of synchronization device and operational amplifier, output of which is connected to input of threshold device, output of which is the output of device.
EFFECT: increased reliability and precision of measurement.
2 dwg
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