BAUR Prüf-und Messtechnik GmbH has introduced “liona” - a portable device for measuring and locating partial discharges during operation. With this device, medium- and high-voltage cables and switching stations can be tested quickly for partial discharges without major expense and disconnections. Special high-frequency current sensors (HFCT, High Frequency Current Transformers) are supplied with the measuring device for performing measurements on an energized power grid. These probes detect the partial discharge signal in the cable screen.
The liona device also comes with capacitive couplers that are used for measurements on the housing of switching stations, for example. To acquire meaningful information in spite of the active mains operation, the device software differentiates between various interference signals (e.g. caused by switching operations). This differentiation is enabled by the DeCIFer algorithm from IPEC Ltd. The algorithm is the result of many years of expertise acquired by IPEC.
The device weighs only 12 kg and has the dimensions of normal cabin baggage. The impact-resistant and moisture-proof box allow the device, the accompanying analysis computer and the accessories to be transported safely.
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