Omicron Electronics Gmbh

Omicron Energy Solutions Gmbh

Mtronix Precision Measuring Instruments Gmbh

Harald Emanuel

Caspar Steineke

Ulrich Klapper

Ronald Plath

Andreas Cobet

Jan Möller

Vincent Boschet

David Kühling

Ole Kessler

Hendrik Schleifer

A method includes detecting a first time, at which a specific partial discharge pulse is detected in an energy transmission cable at a first point at one cable end; detecting a second time, at which the pulse is detected in the cable at a second point at the other cable end; determining a fault location along the in accordance with the first and the second times; determining third and fourth points located in the cable, the third and fourth points delimiting a portion of the cable, including the fault location and none of the other points; detecting a third time, at which a further specific partial discharge pulse is detected in the cable at the third point; detecting a fourth time, at which the further pulse is detected in the cable at the fourth point; correcting the determined fault location in accordance with the third and fourth times.

Testing an energy transmission network and localizing a fault location in an energy transmission cable

This invention concerns methods and devices for calibrating a partial discharge measuring device and for locating faults on cables. In the method, calibration signals, which can include a band-limited white noise, are used with a periodically repeated signal course. By averaging over a predetermined period duration (T) of the calibration signal, it is possible, in the case of a partial discharge measurement, to recalibrate the measuring device continuously during the measurement, and additionally on cables to determine the fault location with great precision.

Method of locating faults on a cable

Method and device for monitoring the status of a sheath voltage arrester of a cable system, a verification signal being supplied to a measuring loop which comprises the sheath voltage arrester and a measurement signal which is subsequently produced in accordance with the frequency-dependent impedance of the sheath voltage arrester being measured at the measuring loop in order to establish the status of the sheath voltage arrester by evaluating the measurement signal.

Method and device for monitoring a sheath voltage arrester of a cable system

The present invention relates to a method for determining partial discharges at an electrical component (). In the case of the method, an electrical signal that comprises partial discharge pulses due to the partial discharges at the electrical component () is detected. Through filtering of the electrical signal by means of n filters (-) having n differing filter characteristics, n filtered partial discharge signals are generated. Respectively one of the filtered partial discharge signals is assigned, respectively, to one of the n filters (-), n being greater than or equal to two. Finally, the partial discharges are determined by linking the n filtered partial discharge signals.

Device and method for determining partial discharges at an electrical component

This invention concerns a method and devices for calibrating a partial discharge measuring device and for locating faults on cables. In the method, calibration signals, which can include a band-limited white noise, are used with a periodically repeated signal course. By averaging over a predetermined period duration (T) of the calibration signal, it is possible, in the case of a partial discharge measurement, to recalibrate the measuring device continuously during the measurement, and additionally on cables to determine the fault location with great precision.

Method of calibrating a partial discharge measuring device

A calibrator apparatus for calibrating the performance of partial discharge measurements at electrical components, such as high voltage cables or transformators, comprises a housing () and an external electrode () to be mounted at the housing (). A control unit () generates a defined charge pulse (Q) depending on a stray capacitance (C) of the external electrode () against ground, which is supplied to the electrical component.

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Berlin, Germany

Harald Emanuel