In a wound current transformer a primary winding which penetrates the iron core is provided with a conductive jacket. In the window of the iron core, there is a ring capacitor which abuts the secondary winding, the coatings of which which form the electrodes and are situated on different sides of the ring capacitor are provided with electrical connection lines. In this current transformer, a change of the division ratio is only possible by connecting in parallel an external capacitor, which is relatively costly. In order to be able to set the division ratio without an additional, external capacitor, there are conductive, cylindrical layers (15, 16) in the wound current transformer between the coatings (14, 19) of the ring capacitor (10), said layers extending, with coaxial alignment, at least over a part of the length of the ring capacitor (10) and being connected to the connection lines (17, 18). The transformer can be used as a combined current and voltage transformer. IMAGE
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