| 摘要 |
FIELD: electric engineering. ^ SUBSTANCE: electronic drainage can be used for protecting pipelines against stray current induced by rail electric transport. Electronic drainage has circuit, which connects unit to be protected against corrosion induced by stray currents and electric transportation vehicle rail provided with differential transformer. Circuit has three parallel branches. The first one has filtering capacitor, the second one - first electronic two-sided switch and first reactor, the third branch has second two-sided electronic switch, second reactor and recuperating capacitor. Midpoint of second branch disposed between first two-sided electronic switch and first reactor is connected to midpoint of third branch through third electronic two-sided switch. Third branch is disposed between second reactor and recuperating capacitor. Both potentials, as positive and negative, can be taken from pipeline. Short time of "rail-pipeline" capacity discharge is provided. Drainage can be used widely for currents up to 1000 A. ^ EFFECT: widened area of application. ^ 1 dwg |
