Abstract: An electrical device, such as a transformer or an inductor, for connecting to a high-voltage network includes a tank which is filled with an insulating fluid and which encases a magnetizable core and at least one winding. A cooling system includes at least one radiator which is arranged outside the tank and is connected to same for circulating the insulating fluid via the radiator. The radiator has at least two heat exchange elements connected in parallel with one another. In order to cost-effectively accelerate a cold start, one of the heat exchange elements is fitted with a thermal insulation unit which reduces the heat transfer from the insulating fluid into the insulated heat exchange element to the atmosphere in comparison with a heat exchange element with no thermal insulation unit.

Abstract: An electrical device, such as a transformer, for connection to a high-voltage network, includes a tank which has an internal chamber filled with an insulating fluid and in which a magnetizable core and at least one winding are disposed. A cooling system having at least one radiator which is disposed outside the tank is connected to the tank for circulating the insulating fluid through the radiator. In order to cost-effectively accelerate a cold start, a circulation unit is disposed at least partially in the tank and is configured for circulating the insulating fluid in the tank.

Abstract: An electrical device for connecting to a high-voltage power grid has a boiler, which is filled with an insulating fluid and in which a magnetizable core and at least one winding, which surrounds a section of the core, are arranged, and a cooling system which includes at least one radiator which is arranged outside the boiler and is connected thereto via the radiator in order to circulate the insulating fluid, wherein the radiator has at least two heat exchange elements which are connected in parallel with one another. In order to enable a cold start to be accelerated and to be carried out even at relatively low temperatures only one of the heat exchange elements has a heat-conducting connection, as a heated heat exchange element, to a heat source which generates heat when the operation of the electrical device is started.

Abstract: A system for compensating one or more DC components in an electrical system includes one or more sensors for sensing the one or more DC components. The system also includes one or more DC component controllers for generating one or more reference signals from one or more signals received from the one or more sensors. In addition to this, the system also has one or more controllers for generating one or more firing pulses from the one or more reference signals received from the one or more DC component controllers and one or more valve configurations for charging one or more controllable branches to counterbalance the one or more DC components of the electrical system. A method for compensating one or more DC components in an electrical system is also provided.