Detektionsvorrichtung zum Erkennen der Remanenzlage des Kernes eines Transformators

The remanent position of the core (2) of a transformer (1) can be determined by a sensor (3) attached in the region of the transformer (1) to detect field amplitudes generated by the transformer (1). The sensor (3) is either a coil (3) to detect the electromagnetic stray field or an acoustic sensor to detect the amplitude of the magnetostrictive sound field caused by the core (2) of the transformer (1). If the output signal of the sensor (3) exceeds a preset threshold value, the primary circuit (7) of the transformer (1) can be connected to a control circuit (12) by the output signal of a comparator (19).