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Analysis of automotive ignition systems in laboratory conditions

100%

Korenciak D. , Kubis M. , Sebok M. , Gutten M. , Kucera M.

tom R. 96, nr 9

48--51

Paper presents basic principles and diagnostic analysis of automotive ignition system for various working and adverse states in laboratory conditions. In the first part of the paper it is examined description and importance of basic diagnostics of automotive ignition system. In the second part of paper they are described on basic principles and solution of spark plug model. In the next part of paper it is focused on proposed test laboratory device for fault simulation. In the finally, specialized measurements were made on the proposed measurement system by simulating faults by applying oil and gasoline between the electrodes and failing to make the ignition contact of the driver on the spark plug.

Artykuł prezentuje laboratoryjną analizę diagnostyczną samochodowego systemu zapłonowego w różnych warunkach pracy. Dokonano przeglądu metod testowania i zaproponowano nowy system diagnostyczny. Przeprowadzono też symulację defektów.

Analysis of insulating parameters of oil transformer by time and frequency methods

100%

Gutten M. , Kucera M. , Brncal P. , Sebok M. , Korenciak D.

tom Vol. 21, No. 4

51--56

In the paper is presented experimental analysis and diagnostics of insulating system oil-paper for power transformers. In the first part of the paper is described base theory about measurement and diagnostics insulating part (oil and paper) of transformers. In the other two parts of the paper is presented experimental results of the diagnostic measurement for the transformer 22/0.4 kV at constant temperature. Specifically, in the second part is described measuring time method of insulating diagnostics - return voltage measurement (RVM). This method is used for analysis of condition of paper moisture of high-voltage equipment. In the third part is described measuring method of insulating frequency diagnostics - frequency domain spectroscopy (FDS). This method is used for analysis insulating condition of high-voltage equipment with insulating oil-paper. The both measuring methods are unique in terms of analysis of insulating system of oil power transformers. In comparison with other methods, the RVM and FDS methods it is possible comparison and evaluate the moisture state of the dielectric paper of the power transformer with high reliability and accurate. Their reliability in determining moisture in paper was shown by determining the same result (3.5%) on the same measured transformer.