| 摘要 |
FIELD: measurement technology. ^ SUBSTANCE: proposed device that can be used for computer-aided measurement of short-circuit impedance in star-connected windings of grounded-neutral power transformer has three-channel common-input variable ac voltage supply and three-phase impedance meter incorporating three common-output voltage channels and three current channels. Three-phase impedance meter has analog-digital unit, nonvolatile memory unit, computing unit, record triggering unit, liquid-crystal display, and computer communication port. ^ EFFECT: enhanced measurement accuracy. ^ 4 cl, 2 dwg |
