Portable devices for high voltage testing of power cable lines RECORDER distance to the fault INSULATION

摘要

The invention relates to an electric apparatus and may be used to determine the distance to the electrical breakdown of the cable line insulation weakened during diagnosis increased DC voltage using a form of electromagnetic wave voltage at the beginning of the line.; A portable device for high-voltage testing power cable lines with the registrar distance to fault isolation, consisting of a measuring element: analog-to-digital converter, an information processing unit, the digital display of distance and visualization unit traces, combined with a high voltage source, consisting of a controlled inverter, the transformer step-up , the high-voltage rectifier and a protective resistance. Joint operation of which is provided attachment unit consisting of a voltage divider, the test voltage down to a safe value needed to operate the analog-to-digital converter and control operation of the unit test parameters terminating resistors therein grounded free cable conductor. Relay protection ensures safe operation of the unit and staff disconnecting it in case of breakdown of insulation during the test. The information processing unit in the measuring body of work provides digital display of distance and the imaging unit waveform.