Apparatus of a global Assessment of Cables Insulation

摘要

In order to secure the reliability of power supply and to reduce the cost of line maintenance, the present invention describes a cable comprehensive insulation evaluation device that can set the minimum diagnosis target suitable for the user environment and achieve the most economically. The present invention is composed of a diagnostic unit for performing insulation diagnosis by measuring the change in the deterioration time constant of the line connected to the conductor and the neutral of the cable, and an analysis and database unit for managing the database of the insulation state data transmitted from the diagnosis unit, After constructing the test circuit, the high voltage switching unit for discharging and the high voltage switching unit for the test power supply are switched, and the time constant change of the line is measured through the time constant measuring resistor to determine the insulation state. According to the present invention, the deterioration time constant can be used to automatically evaluate the insulation status of the line in use, and can manage the measurement and evaluation data and the line environment data in an integrated manner. There is an advantage in that it is possible to carry out diagnostic tests and evaluate insulation status without technical skills and training.