Patent ID: 8111502

Claim:
An arrangement related to a fully powered subsea electric power distributing AC-system, and adapted for a subsea application, said arrangement comprising: a first subsea cable, a second subsea cable adapted for a power supply to an AC-current and AC-voltage adapted power consumer operating in a full power state, a watertight casing, a main power input connection exposed by said watertight casing and adapted for a watertight co-ordination with said first subsea cable, a main power output connection exposed by said watertight casing and adapted for a watertight co-ordination with said second subsea cable, an AC-voltage a voltage regulator arranged within the watertight casing and connected to said first cable, wherein said AC-voltage regulator configured, to reduce an output AC-voltage or power towards zero, utilizing a magnetic flux adoption, a No-load switching unit connected to said second cable, and a control unit arranged within the watertight casing, wherein the control unit is configured to control the voltage regulator and is adapted, for switching of the power consumer in the full power state in the fully powered subsea electric power distribution AC-system, in a disconnecting or breaking sequence, in a first operative mode, to regulate an output AC-voltage, from or via said voltage regulator towards zero and to zero, or at least almost to zero, and in a second subsequent operative mode to bring the NO-load switching unit from an ON-position and to an OFF-position, and wherein said control unit is adapted, in a connecting sequence during a NO-voltage condition, in a third operative mode, to bring the NO-load switching unit from an OFF-position to an ON-position, and in a subsequent fourth operative mode, to regulate the output AC-voltage from said voltage regulator from zero to a predetermined AC-voltage level.