| 摘要 |
This invention is related to a device for protecting, in an electric power plant, an object (1) against over-currents from a network (3) or another equipment comprised in the high voltage plant, the device comprising a first electric switch (4) in a line (2) between the object and the network/equipment. The line (2) between the object and the first electric switch (4) is connected to an arrangement (5) reducing over-currents towards the object (1). This arrangement is activatable for over-current reduction with the assistance of an arrangement (11-13) detecting over-current conditions within a time period substantially shorter than the breaking time of the first electric switch (4). A second electric switch (27) is arranged in the line between the object (1) and the connection of the over-current reducing arrangement (5) to the line (2). |
