Abstract: The invention relates to a method, a device (10) and an arrangement (1) for monitoring alternating current electric apparatuses (3), like e.g. power distribution transformers. The inventive method relies on an inductor antenna (11, 11?) suitable to detect the electromagnetic field at the frequency of the alternating current the apparatus (3) to be monitored is supplied with arranged in the vicinity of but distant to the apparatus (3) to be monitored and comprises the steps: —Detecting the electromagnetic field radiated by the electric apparatus (3) to be monitored; —Digitizing the detected electromagnetic field to obtain EMF-data; —Running a Fast-Fourier-Transformation on the digitized EMF-data to obtain FFT-transformed data; and —Monitoring the magnitudes of the FFT-transformed data at least at the frequency of the alternating current the apparatus (3) to be monitored is supplied with and its third harmonic for anomalies.

Abstract: The invention relates to a method for networked monitoring of at least one object, wherein the following steps are performed: acquiring (110) at least two different acquisition parameters (210) by a monitoring component (20) on at least one object (5), wherein the acquisition parameters (210) are specific to at least one object parameter of the object (5), outputting (130) monitoring information (240) about the acquired acquisition parameters (210) to a network (70) for transmission to a processing system (80) for evaluation (140) of the object parameter based on the monitoring information (240).

Abstract: The invention relates to a method for networked monitoring of at least one transformer (5), wherein the following steps/stages are performed: receiving (110) an electromagnetic signal (210) by a monitoring component (20) at the active transformer (5), the signal (210) being specific to at least one transformer parameter of the transformer (5), carrying out a frequency evaluation (120) based on the received signal (210) by the monitoring component (20), outputting (130) monitoring information (240) about a result of the frequency evaluation (120) to a network (70) for transmission to a processing system (80) for evaluation (140) of the transformer parameter based on the monitoring information (240).

Abstract: The invention relates to a method, a device (10) and an arrangement (1) for monitoring alternating current electric apparatuses (3), like e.g. power distribution transformers. The inventive method relies on an inductor antenna (11, 11?) suitable to detect the electromagnetic field at the frequency of the alternating current the apparatus (3) to be monitored is supplied with arranged in the vicinity of but distant to the apparatus (3) to be monitored and comprises the steps: —Detecting the electromagnetic field radiated by the electric apparatus (3) to be monitored; —Digitizing the detected electromagnetic field to obtain EMF-data; —Running a Fast-Fourier-Transformation on the digitized EMF-data to obtain FFT-transformed data; and—Monitoring the magnitudes of the FFT-transformed data at least at the frequency of the alternating current the apparatus (3) to be monitored is supplied with and its third harmonic for anomalies.