| 摘要 |
The monitoring device (UW) has a line section (L1), which is supplied with an actual current (IST1) and a switch (S1), which is closed in one condition. A primary current (I1) is imposed in the line section in addition to the actual current, where a voltage, conditioned by the magnitude of the actual current and by the magnitude of the primary current, is applied between two inputs of a difference amplifier (DIF1). A control unit (ST) is aligned to determine the magnitude of the actual current from the two voltages. An independent claim is included for a method for monitoring a line section of a monitoring device. |
