Abstract: A method of producing a power electronic assembly and a power electronic assembly including a power electronic module incorporating multiple of semiconductor power electronic switch components, the power electronic module including a base plate with a bottom surface, the power electronic assembly includes further a cooling arrangement for cooling the power electronic module, the cooling arrangement including a cooling surface adapted to be attached against the bottom surface of the base plate of the power electronic module, wherein the power electronic assembly includes further a thermal interface material arranged between the bottom surface of the base plate of the power electronic module and the cooling surface of the cooling arrangement to transfer heat from the power electronic module to the cooling arrangement, the thermal interface material includes a metal foil and a solid lubricant coating.

Abstract: A dielectric insulation medium. The insulation medium is characterized in that it comprises a fluoroketone having from 4 to 12 carbon atoms.

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 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 exemplary apparatus and method are provided in which the apparatus is provided with encoding configuration information as an optical code. The optical code is displayed on a display of the apparatus. The optical code can be read from the display and configuration information derived from the optical code is sent to a database of configured apparatuses.

Abstract: A converter system comprises two phase modules, each phase module comprising a first converter leg and a second converter leg interconnected with a DC link, and a charging transformer for charging the DC link. The DC link comprises two capacitors connected in series between a positive point, a middle point and a negative point, each converter leg adapted for interconnecting an output with the positive point, the middle point or the negative point of the DC link. The phase modules are connected in series via outputs of the converter legs, such that a second converter leg of a lower phase module is connected with a first converter leg of a higher phase module. The charging transformer is connected to the middle point of the DC link of a highest phase module, which provides a phase output of the converter system with an output of a second converter leg. The converter system includes two converter phases, each converter phase comprising at least two series connected phase modules.

Abstract: A corrosion resistant conduit system that protects against corrosion and against electrical shortage. The corrosion resistant conduit system includes: a multilayer conduit having a metal layer disposed between two polymeric layers, a conduit fitting having an electrically conductive component and a body having one or more layers of polymeric material, and means for conductively coupling the metallic layer of the multilayer tube to the electrically conductive component of the fitting, which provides a continuous electrical path throughout the corrosion resistant conduit system.

Abstract: A user interface of frequency converter over a wireless connection is disclosed. The frequency converter can be connected to a mobile communications device over a short range wireless connection. The mobile communications device can be connected to a wide area network to a service center maintaining information associated with frequency converters. Operational information of the frequency converter can be relayed to the service center over the wide area network as a view of the frequency converter user interface. The frequency converter can be controlled by control commands from the mobile communications device, the control commands being determined based on selections received from the service center, in response to the view conveyed to the service center.

Abstract: There is described an electrical energy conversion system comprising: at least a first inverter (1) and at least a second inverter (2), whose outputs are connected in parallel; at least a first DC voltage source (PV1) connected to the input of the first inverter (1) and a second DC voltage source (PV2) connected to the input of the second inverter (2); a ground connection of the first inverter (1) and a ground connection of the second inverter (2). The ground connection of said inverters comprises a ground connection branch (1G; 2G) with a current sensor (5/1; 5/2) which supplies a signal proportional to a leakage grounding current (Ileak) measured in said ground connection branch (1G; 2G). Through the signal proportional to the leakage current measured a feedback signal is generated to control the leakage current (Ileak).

Abstract: A method is disclosed in one embodiment for discharging DC link capacitors. In one form the method includes switching a first half bridge of a first converter unit to a positive state, in which its AC output is connected with its positive DC output, and simultaneously switching a second half bridge of a second converter unit to a negative state, in which its AC output is connected with its negative DC output, such that a DC link capacitor of the first converter unit and a DC link capacitor of the second converter unit are interconnected oppositely to each other and discharged via the electrical filter.

Abstract: An automated power conversion device obtains information on an operational status of the automated power conversion device. Based on the obtaining, the automated power conversion device causes wireless transmission of advertising messages by using a non-connected signalling mode, such that the advertising messages comprise the information on the operational status of the automated power conversion device and are receivable by at least one terminal device of a communications system when the terminal device is located within the listening range of the connectionless signalling mode. The terminal device receives from the automated power conversion device, at least one of said advertising messages when the terminal device is located within the listening range of the connectionless signalling mode. Based on the receiving the terminal device informs the user of the terminal device on the operational status of the automated power conversion device.

Abstract: An earthing switch is disclosed that includes a base for mounting the earthing switch, a first contact element that is mounted on the base via a first insulating element, a shaft mounted in the base, a second contact element, mounted on the shaft, that can swivel relative to the first contact element, so that the second contact element can move between a closed and an open position, a locking and/or monitoring apparatus for locking the shaft and/or for monitoring the position of the shaft, wherein the locking and/or monitoring apparatus is fitted to the base next to the first contact element, wherein a second insulating element held between the base and the first insulating element has an insulating plate that protrudes from the base and that is arranged between the first contact element and the locking and/or monitoring apparatus.

Abstract: The invention relates to an apparatus (1) comprising a generator (5), an evaporator (6), an absorber (8) and a condenser (9) circulating a refrigerant (R), an inert (I) and an absorbent (A) in a diffusion-absorption cycle. The generator (5) and the evaporator (6) are arranged in an electric cabinet (2) to receive a heat load from primary electric components (3) and secondary electric components (4). The absorber (8) and the condenser (9) are arranged outside of the electric cabinet (2) and at a higher level than the evaporator (6) to receive fluid from the generator (5) and the evaporator (6) and for dissipating heat from the received fluid to the surrounding environment. The inert (I) and refrigerant (R) are selected such that the inert (I) is heavier than the refrigerant (R) in order to obtain fluid circulation where the inert (I) exiting the absorber (8) flows downwards to the evaporator (6) and the inert (I) exiting the evaporator (6) flows upwards to the absorber (8).