Abstract: The present invention is concerned with a method of distance protection of parallel transmission lines applicable both to series compensated and uncompensated electric power lines, using a distance relay. The method is characterized in that a pair of flags (ff1, ff2) are calculated for indication faulted and healthy circuits in parallel lines and in the same time a flag (Internal_Fault) for indication internal or external fault in parallel lines is calculated independently. Next gathering all calculated flags (ff1, ff2, Internal_Fault) an analyze of the value of these flags are performed and depending on the values of flags (ff1, ff2, Internal_Fault) and on their reciprocal relationship, a trip permission signal from the protection relay (4) is released and sent to the alarms devices or to the line breakers, or a block signal from the protection relay (4) is generated and sent to protect parallel lines before damage.

Abstract: A method, apparatus and computer program for monitoring the condition of electromechanical systems in which electrical rotating machinery is used. The method includes measuring current and/or voltage signals, measuring an angular position of a rotating shaft of interest of the electromechanical systems or estimating the value of discrete angular position of a rotating shaft, synchronizing the current and/or voltage signals to the scaled angular displacement of the rotating shaft, dividing the synchronous electrical signals into intervals corresponding to each completed rotation of the rotating shaft, averaging a number of intervals of synchronous electrical signals to obtain an average synchronous electrical signal, extracting characteristic data of the magnitude from the values of the average synchronous electrical signal, and comparing the extracted characteristic data with a threshold limit to alarm the user when the limit is exceeded.

Abstract: A system and method for energy harvesting in a data center has one or more collection devices, a thermoelectric device, and a controller for directing the operation of the thermoelectric device and other equipment in the data center. The waste heat generated by the servers in the data center is harnessed and directed into the thermoelectric device where the waste heat is converted to usable electrical energy under the direction of the controller. The recycled electrical energy is then combined with utility-input power and provided to the servers and other equipment in the data center for consumption.

Abstract: An exemplary arrangement includes blocks arranged between the inner winding, the individual barriers and the outer winding in order to maintain defined spacing's along the circumference. At least two coils are arranged axially one above the other on a common core limb. Each coil has at least two windings arranged radially one above the other and barriers are provided between the windings. The barriers of adjacent coils are radially offset with respect to one another, and the edge regions of the barriers engage one another in a comb-like manner.

Abstract: A modular converter is disclosed for a battery charging station, having at least two charging modules connected in parallel. Each of the charging modules can be configured for generating an output current I1, I2, I3 for charging a battery. Each charging module can have a local controller for controlling the charging module. Each local controller of a charging module can be configured for determining a global charging current I and for determining the output current I1, I2, I3 of the charging module.

Abstract: A high voltage DC circuit breaker includes a semiconductor switching assembly in series with a mechanical switch. When the semiconductor switching assembly is switched off due to a current fault, a residual current flowing through arresters of the semiconductor switching assembly is switched off by the mechanical switch. A capacitor arranged parallel to the mechanical switch leads to passive resonance effects, which in turn induce current zero crossings in its arc. The current zero crossings allow for reliable extinguishing of the arc. The mechanical switch can be an AC circuit breaker.

Abstract: A method and apparatus provides an Intelligent Electronic Device (IED) with new hardware modules. Hardware modules are provided that are configured for electrically connecting with connections of a first IED housing that has a first form factor. A second IED housing is provided having a second form factor that is different from the first form factor. The hardware modules are mounted in the second housing. Adaptor structure is employed to electrically connect the hardware modules with connections of the second housing. The second housing is mounted into an existing wiring and second form factor environment.

Abstract: A method for communication between nodes (UR1; UR2; UC1-UC16) of a network, interconnected by a transmission channel and each identified by a node identification number in which at least one transmitter node emits at least one message to at least one message recipient node. The message comprises a description of a path (PH) between the transmitter node which emits the message and the message recipient node. The path is defined by the node that emits the message via a sequence of node identification numbers along the path itself.

Abstract: A power and control unit for a low or medium voltage apparatus, said apparatus comprising at least a couple of electrical contacts that can be coupled/separated by means of an electro-magnetic actuator, first power storage means for supplying electric power for the operations of said apparatus and power supply means for charging first said power storage means, characterized in that it comprises: a primary control device for managing the operations of said apparatus when said power supply means are available; a secondary control device for managing the operations of said apparatus when said power supply means are not available, said secondary control device being able to receive electric power directly from said first power storage means.

Abstract: The invention concerns a method of fault location in HVDC (High Voltage Direct Current) transmission lines, especially in mixed lines, where part of the line is overhead line and part is a cable line. The fault location is based on estimation arrival times of travelling waves induced by fault in transmission line that are propagating along the line from faulted point to the measurement point, which is located at one end of the transmission line.

Abstract: A pole part of a circuit-breaker arrangement having an insulation housing for accommodating a vacuum interrupter insert containing a pair of corresponding electrical switching contacts, wherein a fixed upper electrical contact is connected to an upper electrical terminal molded in the insulation housing and a movable lower electrical contact is connected to a lower electrical terminal of the insulation housing via an electrical conductor which is operated by an adjacent pushrod. The lower electrical terminal is connected to a ring shaped heat transfer shield arranged along the inner wall or at least partly inside the wall of the insulation housing surrounding the pushrod and/or the distal end of the movable lower electrical contact.

Abstract: A circuit breaker including two contacts, a pressurization chamber, a nozzle arrangement designed to blow an arc in a quenching region, with a narrowest passage of a pressurization chamber outflow channel to be passed by outflowing quenching gas defining a pressurization chamber outflow limiting area, a narrowest passage of a nozzle channel to be passed by outflowing quenching gas defining a nozzle outflow limiting area, the smaller area of which defining an absolute outflow limiting area, with quenching gas having a global warming potential lower than the one of SF6 over an interval of 100 years; wherein a ratio of the pressurization chamber outflow limiting area to the nozzle outflow limiting area is less than 1.1:1.

Abstract: A computer-implemented system and method for operating mobile automated workstations in a workspace including a workpiece is disclosed. A computer device defines an exclusionary volume having an outer exclusionary surface at least partially surrounding a mobile workstation that is operably disposed in the workspace. The computer device receives data from at least one sensor and determines the location of the workstation and humans within the workspace based on the data. The computer device activates an indicator and alters the motion of the workstation after detection of a human breaching the exclusionary volume or exclusionary surface.

Abstract: The present invention relates to a detachable connector (1) for a junction block comprising: an insulating body (2), a connection terminal (10) having a housing (8) for an electrically conductive wire (C) intended to be inserted through a first opening (3) of the insulating body (2) along an insertion direction (D) of the electrically conductive wire (C) in the insulating body (2), a connection plug (20) comprising a socket (21) from which extend two elastic connection branches (22a, 22b) intended to ensure an electrical contact with a complementary plug of the junction block intended to pass through a second opening (4) of the insulating body (2), the detachable connector (1) being characterized in that it comprises a passageway (6) for the electrically conductive wire (C) connecting the first housing (8) of the connection terminal (10) and a second housing (9) formed in the socket (21) of the connection plug (20).

Abstract: Exemplary embodiments provide a substrate for mounting multiple power transistors. The substrate has a first metallization on which the power transistors are mountable with an associated collector or emitter, and which extends in at least one line on the substrate. A second metallization extends in an area next to the at least one line of the first metallization, for connection to the remaining ones of the emitters or collectors of the power transistors. A third metallization allows connection to gate contact pads of the power transistors. The third metallization includes a gate contact and at least two gate metallization areas, which are interconnectable. The gate metallization areas are arranged in parallel to the at least one line and spaced apart in a longitudinal direction of the at least one line. At least one gate metallization area is provided as a gate island surrounded on the substrate by the second metallization.

Abstract: A method and system for measuring an electrical quantity in an electrical network. The system is configured to obtain samples of the electrical quantity through measurements at different feeders or locations in the electrical network. The measurements are taken in turns and at different time instants, such that a value sequence is created on the basis of the measured samples.

Abstract: A method and apparatus are provided for differential protection of a three phase electric connection of an electric system. The apparatus includes means for determining a value of an operate quantity, which operate quantity is based on a difference between current quantities at a first point and a second point of the electric connection, and means for detecting a fault in the electric connection between the first point and the second point if the value of the operate quantity exceeds a value of a predetermined threshold quantity. The operate quantity is based on a difference of residual currents at the first point and the second point, or a quantity indicative thereof, and a coefficient indicative of an angle between a residual voltage of the electric connection and the difference of residual currents at the first point and the second point.

Abstract: A dry-type electrical transformer includes a coil assembly having at least one winding wound into a plurality of concentric turns, at least one cooling sector defined between adjacent concentric turns, spacers positioned inside the cooling sector and spaced from each other to allow a plurality of air ducts each defined between two adjacent spacers, and at least one electrical shield positioned in the cooling sector and arranged to electrically shield the air ducts. At least one electrical shield is positioned in the cooling sector and arranged to electrically shield the air ducts. The electrical shield include a first end edge connected to the turn at the inner side of the cooling sector, a second end edge which is free and electrically insulated from the surrounding parts, and a central portion extending between the first and second end edges and is positioned at the outer side of the spacers.

Abstract: A method for transmitting a file from a file source (101) to a plurality of electronic devices (110j) is described herein. To each electronic device are associated an encryption key and a unique identifier code. According to the method described herein, to the plurality of electronic devices are transmitted: a file encrypted by means of a session key, and a plurality of encrypted session keys, each paired with a respective electronic device, with whose encryption key the respective encrypted session key was obtained; Moreover, each electronic device decrypts its own encrypted session key using the respective encryption key to obtain the decrypted session key, and decrypts the encrypted file by means of the decrypted session key.