A transformer arrangement

H - Electricity – 02 – H

Patent

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Details

H02H 9/08 (2006.01) H02J 3/00 (2006.01)

Patent

CA 2680051

A transformer arrangement comprising a transformer having a neutral and formed as a symmetrical transformer, in particular a cage transformer and having a reactor coil connected to the neutral of the transformer is provided. The transformer can be of any type having a neutral such as a Y-n/Y-n, Z-n/Z-n, Y-n/Z-n or a Z-n/Y-n transformer. By providing a transformer having symmetrical phases connected to a reactor coil a transformer arrangement having less weight is obtained. The lower weight is obtained because in comparison to using an E core for the transformer all phases will be symmetrical so that if a ground fault occurs in one of then phases there is no need for any compensatory windings regardless of which phase suffers the ground fault.

L'invention concerne un agencement de transformateur comprenant un transformateur ayant un neutre, et formé sous la forme d'un transformateur symétrique, en particulier un transformateur à cage et ayant une bobine de réacteur connectée au neutre du transformateur. Le transformateur peut être d'un type quelconque ayant un neutre comme un transformateur Y-n/Y-n, Z-n/Z-n, Y-n/Z-n ou Z-n/Y-n. En fournissant un transformateur ayant des phases symétriques connectées à une bobine de réacteur, un agencement de transformateur ayant un poids moindre est obtenu. Le poids inférieur est obtenu parce qu'en comparaison à l'utilisation un noyau E pour le transformateur, toutes les phases vont être symétriques, de sorte que si un défaut de masse survient dans une de ces phases, il n'y a pas besoin de quelconques enroulements de compensation quelle que soit la phase qui souffre du défaut de masse.

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