FIELD: hardware electric drives. SUBSTANCE: resistive power loss in stator and connecting line of drive is subtracted from measured active power. Device for metering active power functions each time when two connecting lines are connected at points distant from drive by pair of conductors to DC voltage source. Known resistance is introduced in one of conductors. Each of these conductors is connected on drive facing side through voltage meter to other conductor. Voltage meters are connected to evaluation unit. EFFECT: improved measurement accuracy. 2 cl, 1 dwg
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