Device for locating spark discharge in electrical equipment e.g. electrophotographic printer, for printing paper web, has evaluation unit evaluating signals to determine comparison values, where spark discharge is located based on values

The device has antennas (58, 60, 62) arranged at electrical equipment (20). An evaluation unit (64) is coupled to the antennas, and evaluates signals to determine comparison values. An electromagnetic wave is generated by spark discharge in the electrical equipment. The comparison values are representative of signal strength of the corresponding signals. The determined comparison values are compared to a predetermined threshold value. The spark discharge is located based on the comparison values when one of the comparison values is greater than the predetermined threshold value. An independent claim is also included for a method for locating spark discharge in electrical equipment. Bei einer Funkenentladung innerhalb eines elektrischen Geräts (20) entsteht eine elektromagnetische Welle. Zum Lokalisieren der Funkenentladung weist das elektrische Gerät (20) mehrere Antennen (58, 60, 62) auf. Die elektromagnetische Welle induziert Spannungen in den Antennen (58, 60, 62). Mit Hilfe eines Vergleichs von Vergleichswerten (V1, V2, V3) von Signalen (U1, U2, U3), die den Antennen (58, 60, 62) zugeordnet und von den induzierten Spannungen abhängig sind, wird die Funkenentladung lokalisiert.