Circuit arrangement for cable testing, cable testing, cable diagnosis and / or cable fault location and device with such a circuit arrangement

摘要

The invention relates to circuit arrangements for cable testing, cable testing, cable diagnostics and / or cable fault location with - a first voltage multiplier for a positive voltage and a second voltage multiplier for a negative voltage source - interconnected power sources in conjunction with the voltage multipliers for generating a test voltage across the load impedance the cable for charging and discharging the load capacity of the cable, and - a controller connected to the voltage source and the current sources, and devices having such a circuit arrangement. The circuit arrangements are characterized in particular by the fact that arbitrary voltage forms of different amplitude can be generated above the cable as an impedance as test object. For this purpose, the control device has a digital signal processor for controlling the test voltage measured via a voltage divider across the load impedance of the cable and for the setpoint specification of the voltage source. The voltage multipliers are connected either to two main transducers or to both a main converter and an auxiliary converter generating a positive and a negative auxiliary voltage.