Abstract: The present invention relates to a power capacitor for high voltage and comprises at least one capacitor element (2a-2d). The object is to achieve a capacitor with improved electrical properties and which allows simple manufacture. According to the invention, each capacitor (2a-2d) has a substantially circular-cylindrical shape. The inside of the container (1) has a corresponding shape so as to closely surround each capacitor element (2a-2d). In addition, each capacitor element (2a-2d) is oriented with the axial direction coinciding with the axial direction of the container. The invention also relates to a capacitor bank (12) comprising a plurality of power capacitors of the invented kind, and to uses of one or more of the invented power capacitors as a component in electrical installations.