Device for monitoring a predetermined current strength in at least one electrical conductor

摘要

In a device for monitoring a predetermined current strength in at least one electrical conductor (16), a transformer (4) is provided with a soft magnetic toroidal core (15), which is surrounded by the conductor (16; 19, 20) to be monitored with at least so many windings that it is magnetically saturated at the predetermined current strength. In order to be able to determine whether the current strength in the electrical conductor (16) overshoots or undershoots a predetermined value, the primary coil (3) of the transformer (4) is connected to an alternating voltage generator (1) and the secondary coil (8) of the transformer (4) is connected to an evaluation unit (14). <IMAGE>