Abstract: An electrical circuit for connecting an electrical measurement device (16), which is used to measure partial discharges in a power grid having an operating voltage in the range of 1-69 kV, and which has an A/D converter (17) for converting a measured voltage pulse into a digital signal and has a microprocessor unit (18) for evaluating the digital signal, with a measurement output of a capacitive voltage testing system (3) of switchgear for the power grid having the operating voltage in the range of 1-69 kV. The electrical circuit (8) has a frequency response matching resistor (9) which is connected between an input line (10) for connection to the live pole of the measurement output and to ground, and has a high-pass filter (11) connected down-circuit of the frequency response matching resistor (9).

Abstract: An electrical circuit for connecting an electrical measurement device (16), which is used to measure partial discharges in a power grid having an operating voltage in the range of 1-69 kV, and which has an A/D converter (17) for converting a measured voltage pulse into a digital signal and has a microprocessor unit (18) for evaluating the digital signal, with a measurement output of a capacitive voltage testing system (3) of switchgear for the power grid having the operating voltage in the range of 1-69 kV. The electrical circuit (8) has a frequency response matching resistor (9) which is connected between an input line (10) for connection to the live pole of the measurement output and to ground, and has a high-pass filter (11) connected down-circuit of the frequency response matching resistor (9).

Abstract: A method for accurately locating a cable defect of an in-ground cable for transmitting electricity, in which a precise position is established with a mobile pinpointing device based on an approximate position of the cable defect that was established previously. A distance of the defect location of the cable from a current position of the mobile pinpointing device is determined by the mobile pinpointing device. The current position is captured by the mobile pinpointing device using a GPS receiver. Subsequently, at least one possible precise position is determined by the pinpointing device based on the captured current position of the pinpointing device, the established distance of the defect location from the current position of the pinpointing device and the extent of the cable that is stored in the pinpointing device.

Abstract: An endless transport belt made of thermoresistant synthetic filaments for transporting yarn is described, which yarn is wound around a plurality of transport belts in the form of loops, said transport belts being arranged polygonal in cross section. In order to reduce stretching of the transport belt, at least one reinforced thread is included among the synthetic filaments, which reinforced thread is preferably a steel wire or cord.