Dual-rated current transformer circuit

Details Dual-rated current transformer circuit Dual-rated current transformer circuit

H - Electricity

01

F

H01F 38/00 (2006.01) H01F 38/32 (2006.01)

Patent

CA 2340775

A dual-rated current transformer circuit (10) has a fust current line (12) which delivers a first current (IA) and a second current line (14) which delivers a second current (IB). A current transformer (20) is coupled to both the first and second current lines, wherein the transformer generates a current proportional to the current of each of the first and second current lines. The circuit can be miniaturized due to the input circuit which lowers the input current to the transformer and design techniques of the transformer which allow for size reduction.

Selon cette invention, un circuit de transformation de courant à deux débits (10) comporte une première ligne de courant (12) qui fournit un premier courant (IA) et une deuxième ligne de courant (14) qui fournit un deuxième courant (IB). Un transformateur de courant (20), couplé aux première et deuxième lignes de courant, génère un courant proportionnel à celui des première et deuxième lignes. On peut miniaturiser le circuit grâce au circuit d'entrée qui abaisse le courant d'entrée à l'entrée du transformateur et grâce à des techniques de conception de transformateurs qui permettent de réduire la taille desdits transformateurs.

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