| 摘要 |
FIELD: electric engineering. ^ SUBSTANCE: device is intended for usage at railroads for finding distance to point of single-phase ground in three-phase electric power lines of block system. Device has test power source, one single-phase and two three-phase commutation apparatuses, three current detectors and measuring module connected to current detectors. According to one version of the design, measuring unit has two adders, maxi-selector, divider, multiplier, and constant value preset unit and scale member. According to the other version, device has additional, fourth current detector and measuring module has adder, maxi-selector, divider, multiplier, constant value preset unit and scale unit. ^ EFFECT: simplification in design; improved precision of finding point of ground. ^ 7 cl, 2 dwg |
