Control of electric field at direct voltage

The present invention relates to a device for controlling an electric field at, for example, a connection (1), a termination, or a joint of a high-voltage cable (2) for dc voltage. The essential feature in the invention is a combination of resistive field control, comprising at least one resistive layer (7) arranged along the cable (2), which layer, at one end (12), is electrically connected to an inner live conductor (3) of the cable (2), and, at its other end (13), is electrically connected to ground potential, and geometrical field control, comprising a stress cone (11) which is arranged at said other end (13) of the resistive layer (7).