Circuit Arrangement For Generating a Test Voltage, in Particular For Testing The Insulation of Installed Cable

Abstract

The invention relates to a circuit arrangement for generating a test voltage, in particular for testing electrical equipment, comprising an alternating voltage source or a voltage source having constant or essentially constant voltage and a circuit means connected to the voltage source for generating a preferably low-frequency alternating voltage U0. A power converter, preferably configured as a resonant converter, is connected to the alternating voltage source. A transformer device connected to the power converter is used for generating a high frequency UT, and a rectifier circuit means, in particular a cascaded and/or multistage one, is used for converting the high frequency to an amplitude that can be changed to a direct current voltage UHV. Furthermore, a switch device for charging the equipment being tested with the direct current voltage UHV and for discharging same is provided. In said circuit arrangement, the input of a converter is connected to the alternating voltage source U0 and the output of the converter is connected to the switch device for charging and discharging the equipment being tested. On the input side, the power converter is configured with (n) switch elements, and on the output side, the power converter comprises several (k) stages. The rectifier circuit means (C1 to C4, S5 to S8) is configured combined as an inverter circuit for discharging the equipment being tested, the switches of which can also be switched to valves that allow current flow in one direction only.

Dependencies are inferred from the claim text.