Abstract: A test device for testing a test object, such as a high-voltage or medium-voltage cable, includes a power converter, a transformer for transforming an HF signal into a high-voltage signal, wherein the transformer comprises a primary winding, a protective earth shield for shielding the primary winding, wherein the protective earth shield is capacitively coupled to the primary winding and is electrically connected to the protective earth potential, a secondary winding, and an internal earth shield for shielding the secondary winding, wherein the internal earth shield is capacitively coupled to the secondary winding and is electrically connected to the internal earth collection point. The test device further comprises a rectifier circuit electrically connected to the high-voltage output for outputting a rectified high-voltage signal and a high-voltage circuit arrangement for generating the VLF test voltage based on the rectified high-voltage signal.

Abstract: A testing device for testing a high or medium-voltage cable comprises a circuit arrangement with a test voltage generator, which comprises a low voltage-side earthing input and a high voltage-side output and is designed to provide a variable test voltage, a test specimen connection for connecting the high voltage-side output to a conductor of the cable, a protective earth connector for connecting to protective earth, a connecting conductor which electrically connects the low-voltage-side earth input to the protective earth connector, so that the connecting conductor represents a current collection point through which a measuring current flows during the test, and a high-frequency signal pick-up at the current collection point, at which a high-frequency pre-location signal is generated based on the measuring current.

Abstract: A device for measuring the loss factor and/or measuring the phase angle between a voltage and a current and/or recording a voltage decay and/or current decay and/or recording partial discharge processes and/or measuring the propagation time on test objects that are to be tested, includes a housing in which at least one measuring circuit is arranged for measuring and/or recording purposes. A terminal adapter (12) is provided on the housing (9) to connect the test object that is to be tested directly to the housing (9).