Abstract:
A multiphase medium voltage vacuum contactor is disclosed which can include a mounting frame on which there are positioned: for each phase, a current interrupter having a vacuum bulb which contains a fixed contact and a corresponding movable contact; and an actuator for moving the movable contacts between a closed position where they are coupled each to a corresponding fixed contact and an open position where they are each electrically separated from the corresponding fixed contact, and an electronic unit driving the actuator. An exemplary voltage transformer for feeding the electronic unit can be mounted on the frame. One or more sacrificial fault-protection devices and/or current sensors can be operatively associated to the voltage transformer and embedded into an electrically insulating coating encasing the transformer.
Abstract:
One exemplary embodiment is a system comprising an operator input device structured to move in response to operator-applied force and to selectably output feedback force to the operator. A first computing system is structured to receive input from the operator input device and provide an output. A second computing system is structured to receive the output and provide a robot control command subject to a force constraint. An industrial robot system is in operative communication with the second computing system and comprises a robotic arm structured to move in response to the command. The second computing system is structured process the output to impose a force constraint using a dual threshold hysteresis control. The first computing system is structured to apply a feedback force to the operator input device correlated to force associated with the industrial robot system.
Abstract:
The application concerns a support structure for power electronics, comprising a holder for the insertion of at least one power electronics module and an electrically conductive external geometry which surrounds the holder and has rounded corners and edges with a radius of curvature which is greater than a predetermined minimum radius.
Abstract:
A method controls a switching device having at least one phase comprising at least one couple of contacts which can be actuated for switching between a closed condition and an open condition. The method provides control means for controlling the actuation of the at least one couple of contacts, such control means being adapted to operate using time cycles; set the time cycles with a predetermined time duration; detects a difference of a value of a parameter associated to the phase with respect a preset value.
Abstract:
A connecting-device for a switchgear apparatus, includes: tulip-cluster-portions for electrically engaging with a contact-stud-element; a mounting-end-part for the mechanical connection to a pole-terminal, and conductive-transmitting-portions for transmitting electrical current from the contact-stud-element to the pole-terminal, each of the conductive-transmitting-portions extending from the respective tulip-cluster-portion to a respective base-portion of the mounting-end-part. The tulip-cluster-portions with the respective conductive-transmitting-portions and with the respective base-portions are integral with one other so as to define respective single-piece-portions.
Abstract:
An integration system and method, for a more efficient integration of communication devices in a distributed device management system (DMS), has several FDI and OPC UA components to be applied to and/or integrated in a DMS and providing one or more processing units, in particular at least one discovery unit as well as executable data structures, to discover and determine distributed operable communication servers and/or devices, in particular independent from their location, so to say independent whether they are located within the components of the DMS like for example the FDI servers, the FDI clients, OPC UA discovery servers or stand-alone in the engineering/control/field network, as well as to a corresponding DMS comprising said system and/or performing said method.
Abstract:
A measuring device for determining the temperature of a medium in a container or a pipe has at least one temperature sensor, arranged on the outside of a container or pipe wall; an output for the temperature registered thereby; and an output for the measurement result obtained thereby. The device connects at least one first differentiator, capable of determining at least one first derivative of the progression over time of the temperature registered by the temperature sensor; at least one first multiplier for multiplying the derivative by a first factor which is a value for the time constant of the heat transfer through the wall; andat least one adder,between the output of the temperature sensor and the output of the measuring device.
Abstract:
A converter arrangement comprises first and second modular multilevel converters, Each of the modular multilevel converters comprises two converter branches. Each converter branch comprises a plurality of series-connected converter cells. Each converter cell comprises a cell capacitor and semiconductor switches for connecting and disconnecting the cell capacitor to the converter branch. At least two converter branches of the first modular multilevel converter are connected via first branch connection point and at least two converter branches of the second modular multilevel converter are connected via second branch connection point. The multilevel converters are connected in parallel via a phase connection point for connecting the converter arrangement to a load or a power source, wherein the phase connection point is connected via a first inductance with the first branch connection point and/or via a second inductance with the second branch connection point. At least one of the modular multilevel converters comprises a protection system.
Abstract:
A method to determine pressure inside a vacuum interrupter for medium or high voltage use, having at least one fixed contact piece and at least one movable contact piece arranged inside the technical vacuum of a vacuum interrupter, and wherein contact pieces are electrically connected to external electrical fixation points can implement a high accuracy pressure sensing in rough conditions inside a vacuum interrupter, without additional components internally to the vacuum interrupter, by connecting the external electrical fixation points with an external electrical energy source, and in the disconnected or open position of the vacuum interrupter, the effect of a cold cathode vacuum gauge will be used, in that the leakage current between the open contacts generates an x-ray induced ionization of the rest-gas inside the vacuum interrupter, and the resulting current is measured with high resolution, in order to determine by this current the rest-gas pressure inside the vacuum interrupter.
Abstract:
A MV switching device (100) comprising: one or more electric poles, each comprising a movable contact (16) and a fixed contact (17) adapted to be coupled or uncoupled during the switching operations of said switching device; and an electromagnetic actuator (13) operatively coupled to the movable contacts of the electric poles, said electromagnetic actuator having at least an excitation winding (152); power supply means (60) for supplying electric power to said electromagnetic actuator; a power drive circuit (1) for driving said electromagnetic actuator, said power drive circuit comprising sensing means for providing signals indicative of the currents flowing along the circuit branches of said power drive circuit and of the voltages at the terminals of said power drive circuit.