| 摘要 |
<p>The circuitry is used in cable distribution medium voltage networks. It prevents any chance of removing the high potential from an earthing device of the supplying substation to the user and localization is made in the first currentless pause of a cable with earthing connection. According to the invention, the sheathing of each cable, going out from a supply substation (1) contains an earthing device (2) is insulated from the earthing device and between themselves, and the sheathing of cable (3), found at its other end are connected to the earthing device (4) of the first step-down substation (5) by a fault registration unit (6) of the automatic damaged cable localization circuitry. The registration unit is connected to the electronic unit of the circuitry (7), to which are coupled current transformers (8), a switching-off coil actuated by a spring actuation of the disconnector (9) and LV side of the substation (10). 2 claims, 1 figure</p> |
