Abstract: The subject matter herein pertains to a current transformer, comprising a secondary coil, connection contacts for establishing electrically conductive contact with the secondary coil from the outside, and a housing having a housing body and a housing head, wherein the secondary coil is accommodated in the housing body and/or is attached to the housing body, and the connection contacts of the secondary coil are provided on the housing head. According to one implementation, a connecting mechanism is provided, by means of which the housing head and the connection contacts can be mechanically or electrically conductively detachably connected to the housing body and to the secondary coil. A current transformer is therefore provided, which is cost-effective to produce and is flexible in terms of the use thereof.