Radio frequency oscillation detector

#This application is the National Stage of International Application No. PCT/DE00/03318 and claims the benefit thereof. This application claims the benefit of Federal Republic of Germany Application No. 19949172.0, filed Oct. 12, 1999, both incorporated by reference herein in their entirety.

#The present invention relates to a sensor for detecting radio-frequency oscillations of the voltage in a line, with the sensor having a capacitor whose first connection can be connected to the line. A sensor such as this is used for detecting radio-frequency voltage oscillations in power stations.

#Discharges and flash-overs can occur for various reasons in power stations. These lead to radio-frequency pulses, which are transmitted to one or more lines. In order to protect a power supply with high quality, these pulses must be detected and evaluated.

#The invention will be described in more detail in the following text with reference to an exemplary embodiment which is illustrated schematically in the drawing, in which:

#FIG. 1 shows a schematically illustrated arrangement of a sensor according to the invention;

#FIG. 2 shows a schematic illustration of the circuit on which the sensor is based;

#FIG. 1 shows, schematically, a sensor 10 according to the invention, which is held in an intermediate space 13 between a live line 11 and a grounded shield 12. The sensor 10 has a contact point 14, a capacitor 15, which is held on both sides by plates 16, 17 composed of aluminum, a current transformer 18 and a bush 19. The bush 19 is arranged outside the shield 12.

#The lower plate 17 is connected to a connecting plate 20 via an insulated intermediate plate 23. The intermediate plate 23 is used for isolation of the capacitor 15. Screws, which are illustrated schematically, are used for attachment.

#The sensor 10 is attached to an insert 21 via the connecting plate 20. The insert 21 is connected to the shield 12 in a manner which is not illustrated in any more detail, for example via a welded joint. It is once again attached by means of schematically illustrated screws. One or more seals 22 is or are arranged between the connecting plate 20 and the insert 21, for shielding and for oscillation damping.