Measuring and Diagnostic System of Distribution Transformers in Test Room

This paper is focused on the description of the proposed and implemented diagnostic system of transformers (DST) in test room for check of repair distribution devices 22/0.4 kV for power to 1000 kVA. The introductory part of the paper describes the technical solution of the system DST in terms of its source, measuring and control part for control and analysis of repaired distribution transformers. In the next part of the paper, a description of the short-circuit measurement method using the source and measuring part of the DST system and automated control using its software program is selected. In the last part of the paper is described how it is possible to increase the reliability of short-circuit voltage measurement thanks to a highly accurate automated diagnostic measuring system DST.