APA 6th Edition Levi, R., Milojević, G. i Osmanbašić, E. (2017). Reactor-type tap changers testing. Transformers Magazine, 4 (1), 82-88. Preuzeto s https://hrcak.srce.hr/202379
MLA 8th Edition Levi, Raka, et al. "Reactor-type tap changers testing." Transformers Magazine, vol. 4, br. 1, 2017, str. 82-88. https://hrcak.srce.hr/202379. Citirano 28.11.2020.
Chicago 17th Edition Levi, Raka, Goran Milojević i Edis Osmanbašić. "Reactor-type tap changers testing." Transformers Magazine 4, br. 1 (2017): 82-88. https://hrcak.srce.hr/202379
Harvard Levi, R., Milojević, G., i Osmanbašić, E. (2017). 'Reactor-type tap changers testing', Transformers Magazine, 4(1), str. 82-88. Preuzeto s: https://hrcak.srce.hr/202379 (Datum pristupa: 28.11.2020.)
Vancouver Levi R, Milojević G, Osmanbašić E. Reactor-type tap changers testing. Transformers Magazine [Internet]. 2017 [pristupljeno 28.11.2020.];4(1):82-88. Dostupno na: https://hrcak.srce.hr/202379
IEEE R. Levi, G. Milojević i E. Osmanbašić, "Reactor-type tap changers testing", Transformers Magazine, vol.4, br. 1, str. 82-88, 2017. [Online]. Dostupno na: https://hrcak.srce.hr/202379. [Citirano: 28.11.2020.]
Sažetak This paper discusses DVtest or Dynamic Resistance Measurement, a new diagnostic method used in detecting on load tap changer (OLTC) operational problems, as applied to reactor-type tap changers. Several cases of tap changer problems are presented, which were detected using the DVtest method – a high speed recording of a DC test current as the OLTC goes from tap to tap. The focus of the article is on the reactor-type tap changers. These reactor OLTC constructions apply Preventive Autotransformers (PA) for current control instead of resistors. Specific features in the current traces due to this particularity are explained. Finally, the article presents a discussion of the principles, DVtest features and defect cases for tap changers in a series transformer/booster arrangement.