Insuring the Reliability of Heavy-Current Electrical Equipment

Some particular methods must be used in the investigation and insurance of the reliability of the complex small-production systems; like in the heavy-current electrical industry of Romania, which is more and more diversified. Theoretically, the scarcity of data leads to erroneous predictions of wearout, or to very large confidence intervals. Therefore, the use of statistical techniques in these situations is limited. The author presents his experience in utilizing both the physics of failure approach (analytical method); and the laboratory/field tests (experimental method), on both the systems and parts. Models of appropriate inquiry-sheets for the analysis of electric machines running performances, used by the author are presented; and some Romanian equipment is exemplified. The original organization of the reliability activity in a modern Romanian electric plant is graphically illustrated.