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Low current transformer utilizing Co-based amorphous alloys

Abstrakt

Metal oxide surge arresters have been widely used for protection of power system networks against overvoltages due to atmospheric discharges or malfunction of devices connected to the network. During its operation a surge arrester structure is degradated, what can be observed as an increase of a surge arrester leakage current. Paper presents an implementation of a new, high-permeability, Co64Fe4Ni1Si15B14 amorphous alloy as a current transformer for monitoring of a leakage current in low voltage surge arresters. The characteristics of the current transformer for different loads have been measured in the system using very sensitive current-voltage converter. Experimental results confirmed that low current transformer utilizing Co64Fe4Ni1Si15B14amorphous alloy in annealed state gives a possibility to measure a leakage current about several A with operating frequency 50Hz. Moreover, the results indicate, that the leakage current waveforms have a different shape than a pure sine wave voltage applied to the surge arrester enabling an evaluation of the device nonlinearity as a measure of its degradation by means of a resistive component of the leakage current.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
IEEE TRANSACTIONS ON MAGNETICS nr 48, strony 1493 - 1496,
ISSN: 0018-9464
Język:
angielski
Rok wydania:
2011
Opis bibliograficzny:
Salach J., Hasse L., Szewczyk R., Smulko J., Bieńkowski A., Frydrychowicz P., Kolano-Burian A.: Low current transformer utilizing Co-based amorphous alloys// IEEE TRANSACTIONS ON MAGNETICS. -Vol. 48, nr. No. 4 (2011), s.1493-1496
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1109/tmag.2011.2172589
Weryfikacja:
Politechnika Gdańska

wyświetlono 12 razy

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