Abstract: A fault current limiter arrangement for a low, medium and high voltage electricity grid, including a fault current limiter unit which is arranged in line with a circuit breaker unit including a fixed electrical contact which is connected to a lower electrical terminal and a movable electrical contact which is connected to an upper electrical terminal, in order to interrupt the current flow after the fault current limiter unit has limited the current flow in a detected fault event. The fault current limiter unit includes a movable electrical sliding contact part which is electrically arranged between the upper electrical terminal of the circuit breaker unit and the movable electrical contact of the circuit breaker unit, and which is movable between a short circuit position adjacent to the upper electrical terminal and a remote position far from the upper electrical terminal for providing a maximum electrical resistance for the current flow.

Abstract: The present application relates to a charger for electric vehicles, comprising at least two power exchange ports for vehicles, each port comprising a data communication connection for at least receiving a power request from a vehicle, and a power exchange connection for delivering power to a vehicle; at least one grid connection for receiving electric power; a data communication bus, for communicating the power request from the vehicles to a plurality of autonomously controllable power converters, each for converting power from the grid connection to a suitable level for charging a vehicle; and each of the power converters comprises a data communication device, connected to the data bus, and configured for receiving power requests from vehicles; and configured for indicating its available power via the data bus.

Abstract: A sulfur hexafluoride (SF6) insulated circuit breaker system having a controller coupled to at least two different sensor devices and operative to control a heat output of an SF6 heater based on signals from the sensor devices. An SF6 insulated circuit breaker system includes a controller coupled to a circuit breaker position indicator and operative to control an SF6 heater based on a signal from the contact position indicator sensor. An SF6 insulated circuit breaker system has a controller coupled to an SF6 density monitor and operative to control an SF6 heater based on a signal from the SF6 density monitor.

Abstract: A method and an arrangement are disclosed for determining the direction of excess currents in energy supply networks, such as in medium voltage networks. An exemplary method and arrangement render it possible to reliably isolate a point of fault caused by a short-circuit or excess current, even if switching systems of the energy supply network do not include a capacitive pickup. Exemplary arrangements include an energy supply network which connects, via a transformer, a medium voltage network to a low voltage network.

Abstract: Methods, systems, and computer readable media for monitoring and management of a power distribution system are disclosed. In one example, the method includes receiving sensory measurement data captured by a mobile inspection device during an inspection of power distribution system elements in a power distribution system. The method further includes processing the received sensory measurement data to derive fault identification data that indicates a fault condition existing in one or more of the power distribution system elements and utilizing the derived fault identification data to update a network model of the power distribution system.

Abstract: A power cable termination device for a high voltage direct current gas-insulated switchgear including: an outer housing made of an electrically conducting material, connectable to the switchgear; a terminal portion of a power cable, the power cable including an electrical conductor, a circumferential electrically insulating layer, and a circumferential conductive shield which is stripped off along a first part of the power cable; an electric field grading system including a resistive field grading material layer arranged circumferentially around the power cable to axially cover the edge of the conductive shield where the conductive shield is terminated, the resistive field grading material layer being in electrical contact therewith, and a connection device connectable to the gas-insulated switchgear and arranged to provide mechanical support and electrical contact with the gas-insulated switchgear.

Abstract: An actuator for a mechanical switch, a mechanical switch, a circuit breaker and a high voltage power transmission system including such an actuator are disclosed. The actuator includes at least one armature and a first primary coil with turns wound around a central coil axis, where the armature is movable along the central coil axis and there is a magnetic flux concentrator provided at least around the first primary coil.

Abstract: An exemplary nozzle ring has two fastening rings and a plurality of guide vanes, wherein holes are provided in one of the fastening rings for accommodating pins of the guide vanes, and openings are provided in the other fastening ring for accommodating positioning aids on the guide vanes.

Abstract: A heat exchanger for a transformer including a heat exchanger medium, which can be introduced into a heat exchanger element via a feed element, and can be evacuated from the heat exchanging element via a discharge element. A first temperature measurement device measures a temperature of a feed flow of the heat exchanger medium and a second temperature measurement device measures a temperature of a discharge flow of the heat exchanger medium. A first opening is provided in the feed element, inside of which a first temperature probe is positioned at a predetermined location inside the feed flow during operation of the heat exchanger, and a second opening is provided in the discharge element, inside of which a second temperature probe is positioned at a predetermined location in the discharge flow during operation of the heat exchanger.

Abstract: The invention relates to a cooling element (11) comprising: a fluid channel (1) providing a pulsating heat pipe, a first evaporator (14) for receiving heat from electric components (15) and for passing the heat into fluid in the fluid channel (1), and a first condenser (18) for receiving fluid from the first evaporator (14) via the fluid channel (1) and for cooling fluid in the fluid channel. In order to obtain an even temperature distribution at the first evaporator (14) an adiabatic zone where the temperature of the fluid in the fluid channel (1) remains unchanged or a cooling zone, with a second condenser (20) cooling fluid in the fluid channel (1), separates the first evaporator (14) from the loops (6) in the second end (12) of the fluid channel.

Abstract: An explosion vent mounted to seal an opening formed on a wall of a closed space comprises a cover being dimensioned to fit on said opening and having a perimeter with an edge adapted to seal the cover against the opening with a sealing element. A spring element is arranged to hold the cover in the opening and the spring element has a direction of spring action. The cover is held by opposite retaining surfaces in the opening and the cover and he retaining surfaces are acting against the spring action of element. The sealing element is positioned against the opening so that the sealing force is directed at least partially crosswise to the direction of the spring action of the spring element.

Abstract: A method is disclosed for providing a network bridge between a source and a receiving network of a communication network, wherein the network bridge includes two content-bridging nodes connected between the source and the receiving networks according to a redundancy schema defined in IEC62439-3. The method can include assigning a common source network node identifier to the two content-bridging nodes; receiving, by each of the two content-bridging nodes, network traffic within the source network; and forwarding, by each of the two content-bridging nodes using the source network identifier, the network traffic from the source to the receiving networks.

Abstract: The Invention relates to a control device (25, 28, 29) for controlling a robot system (11) with at least one robot arm (14, 18) on which a surgical instrument (15, 19) is secured that has an end effector (17, 21), wherein the control device (25, 28, 29) comprises an imaging system (25, 28) that records the control specification of at least one hand (30L, 30R), evaluates it and converts it to corresponding control commands for one or more components of the robot system (11).

Abstract: A method for deriving at least one operating parameter of a fluid-insulated electrical apparatus, in particular of gas-insulated switchgear. The operating parameter is dependent on a dielectric breakdown strength of an insulation fluid of the electrical apparatus. The insulation fluid includes at least three components that are assigned to at least a first and a second component group such that at least one component group comprises at least two components. The component groups differ in their weighted average values of the molecular masses of the components in the respective component groups. At least one quantity which is indicative of the concentration of the first component group and of the concentration of the second component group is determined from the insulation fluid, e.g. by measuring one or more measurement variables with one or more sensors. The operating parameter is then derived using the at least one quantity.

Abstract: An inverter for renewable energy applications, comprising: a meter; and a cellular card which is operatively connected to said meter and which is adapted to provide a communication with a network of a mobile network operator.

Abstract: The invention relates to a circuit breaker comprising a first and a second contact assembly, wherein one of the contact assemblies comprises contact fingers arranged in a finger cage configuration and the other contact assembly comprises a tube or rod contact. The contact fingers comprise an impact point where the tube or rod impacts the contact fingers for the first time during electrical connection establishment, and a contact zone which contacts the tube or rod when the electrical connection is established. The contact zone comprises two contact points separated from one another and arranged on a line which is perpendicular to the longitudinal axis.

Abstract: A condenser for condensing vapor to liquid for cooling a switchgear having a heat generating component inside an enclosure and tubing structure associated with the heat generating component. A working fluid is disposed within an end portion of the tubing structure. The condenser includes a hollow tubular base defining a volume and having first and second opposing opened ends. A plurality of fins extends from a periphery of the base. The fins are in spaced relation and disposed about the entire circumference of the base. A first end cap is coupled to the base so as to close the first opened end. A second end cap is coupled to the base to close the second opened end. The second end cap has port structure constructed and arranged to fluidly communicate the tubing structure with the volume.

Abstract: A method for estimating a motor parameter in a load commutated inverter arrangement, including the steps of: measuring a motor side ac-voltage; detecting commutation interval information of the measured motor side ac-voltage; estimating a motor parameter based on the detected commutation interval information; and indicating when the estimated motor parameter deviates from a monitoring parameter thereof.