Abstract: A rotor is disclosed for a synchronous reluctance machine which includes an axis, which is supported by bearings to rotate inside a stator, and to which axis a rotor frame has been attached. The frame can be made of magnetically non-conductive material, having arranged magnetically conductive bar-shaped objects which extend through the rotor frame from the outer surface of the magnetic pole of the rotor to the outer surface of the pole. The whole length of each bar-shaped object inside the rotor frame can be surrounded by non-magnetic material.

Abstract: A high voltage bushing including a hollow insulator and a conductor extending through the hollow insulator and including a hollow conductor fixed at the ends of the hollow insulator. The conductor includes a supporting part arranged inside the hollow conductor, the supporting part extends in the longitudinal direction of the hollow conductor and the supporting part is adapted to support the hollow conductor in order to increase the stiffness of the conductor and thereby decrease the static deflection of the conductor in the hollow insulator.

Abstract: A method is described for the transmission of data among devices (D1, D2, . . . Di, . . . Dn) connected to a communication channel (1) through sequences containing at least two symbols, one dominant (“0”) and one recessive (“1”). According to this transmission method, one (DTSG) of the devices connected to the communication channel (1) has the function of time slot generator and it transmits on the communication channel (1) with a transmission frequency (f) a sequence of symbols, each defining a time slot in a sequence of time slots. The sequence of symbols comprises at least a series of recessive symbols (“1”). When one of the devices (Di) has to transmit on the communication channel (1), it generates a sequence of symbols, synchronized with the sequence of time slots generated by the time slot generator device (DTSG) and comprising at least one dominant symbol (“0”).

Abstract: A method provides a radial drop winding for an open wound transformer. A plurality of non-electrically conductive posts are arranged to define an interior space. Each post is of generally L-shape having a main body and a leg extending from a bottom end of the main body. During an open winding process, conductive wire is dropped to build up lengthwise along the posts to define at least one generally cylindrical winding segment supported by the legs of the posts.

Abstract: A single- or multi-phase dry-type transformer includes at least two coils. A barrier between phases made of an electrically insulating material is arranged in the intermediate space between the individual coils.

Abstract: A computer-implemented method provides a job performance plan for a plurality of jobs to be performed at geographical locations. The computer receives job data that represent job requirements for specified locations and processes the job data with the data-structure to provide an initial job performance plan. The computer receives updated job data and identifies a sub-set of the data structure. The computer processes the updated job data with the sub-set to provide an updated job performance plan, wherein some of the routes are re-assigned to specified job performers. The sub-set is selected under consideration of location clusters. Step repetitions with different clusters are provided to increase accuracy.

Abstract: A computer system for executing a method for improving route assignment performance. A route data structure is provided with a labeling algorithm. The route data structure has one or more route vectors representing a set of route options for a plurality of available resources to fulfill a plurality of job orders at respective physical locations. A linear program is solved to obtain a route assignment solution for the set of route options in the route data structure. If the solution is non-fractional, then the solution is provided as the route assignment solution for the set of route options. If the solution is fractional, then route options having solution variables with a non-fractional route-is-assigned value are identified as assigned routes and a subset of the fractional solution variables are rounded to the route-is-assigned value.

Abstract: A high voltage DC breaker apparatus configured to break a fault current occurring in a high voltage DC conductor includes a current limiting arrangement having at least one section with at least one semiconductor device of turn-off type and at least one arrester connected in parallel therewith, and a mechanical DC breaker connected in series with the current limiting arrangement and including a mechanical switch. The mechanical DC breaker is configured to enable breaking of a fault current in said DC conductor once said semiconductor devices of said arrangement have been turned off.

Abstract: In one aspect of the teachings herein, a self-commutated current source converter is operated in a manner that compensates for the reactive power consumption and/or harmonics generation of a line-commutated current source converter used in the transfer of electrical power between an AC power system and a DC power system. In this regard, the line-commutated current source converter is operated as a first converter in a hybrid converter apparatus and the self-commutated current source converter is operated as a second converter in the hybrid arrangement. According to one example, the first and second converters are stacked, such that each shares a portion of the DC voltage on the DC side of the hybrid converter apparatus, while in another example, the second converter is not used for power conversion and instead is used solely for compensation with respect to the first converter.

Abstract: At least two winding modules nested hollow-cylindrically one inside the other and extending around a common winding axis, wherein said winding modules are spaced radially apart from one another within at least one hollow-cylindrical cooling channel arranged therebetween by means of insulation strips, wherein the insulation strips have a cross-sectional form which avoid a surface profile radially with respect to the winding axis, the insulation strips including one of a fiber-reinforced epoxy, polyester resin, or from an unreinforced thermoplastic material.

Abstract: Exemplary methods for inspecting electrical equipment in a power distribution network can include the steps of recording, by a mobile device, a photograph with a view of the object, transmitting recording information of the mobile device and the photograph to a computer server hosting a power network description database; generating, from a model stored in the power network description database of a candidate object and based on the recording information of the mobile device, a representation of the candidate object, and comparing the transmitted photograph and the generated representation to identify and characterize the object in the photograph as the candidate object.

Abstract: A sample injection system for a field-mountable gas chromatograph is described. The system has a sample injection chamber and a vaporization chamber. An analyzer valve is connected to both the vaporization chamber and the gas chromatograph to provide the liquid sample having a dew point above 60° C. and 15 psig to the gas chromatograph. The system and associated valves can be mounted on a panel that is connected to the gas chromatograph, the source of carrier gas and a calibration cylinder. Also described are the purging, sample collection and sample analysis techniques.

Abstract: A voltage sensor is disclosed for high and medium voltage use, wherein a voltage divider is arranged in a housing with external creepage distance enlarging ribs. To implement structures for creepage path enlargement to a sensor housing in a very effective and easy way, the voltage divider is arranged in a housing or in housing modules which is or are covered at least partly by at least one shrinking tube of insulating material such that the shrinking creepage enlarging structures are implemented at least at outer surface of the shrinking tube.

Abstract: An electrical test switch has an integral energized circuit indicator. The energized circuit indicator is integrated into the front and/or rear covers of the test switch. The energized circuit indicator is passive and senses properties of the at least one conductor of the device being tested by being placed in proximity of the device. The voltage display provides personnel a visual indication of whether the electrical device being tested is energized without requiring a physical test or direct connection to the at least one conductor of the device being measured.

Abstract: A method and a device are disclosed for managing and configuring field devices in an automation installation with a configuration tool which is designed to physically detect a field device in the automation installation, to logically incorporate the field device in the automation installation and to configure the field device in the automation installation, the configuration tool including a predefined first field-device-specific information packet which at least partially describes the functions and data of the field device. For repeated performance of actions for devices and displays which are already being used, a permanent device overview includes all devices which are already being used, and a temporary display overview includes all displays which are already being used for a device, the temporary display overview being displayed on an individual-device basis in each case when a device is selected from the permanent device overview.

Abstract: A method and a device are disclosed for managing and configuring field devices in an automation installation with a configuration tool which is designed to physically detect a field device in the automation installation, to logically incorporate the field device into the automation installation, and to configure the field in the automation installation, the configuration tool including a predefined first field-device-specific information packet which at least partially describes the functions and data of the field device. The field devices can be represented in each case by identical screen elements in the configuration tool, which screen elements have a same construction and same functions independently of a location of a device selection.

Abstract: An encapsulated switchgear that includes a housing defining, an insulating space, and an electrical active part arranged in the insulating space, the insulating space with an insulation medium. The switchgear is characterized in that the insulation medium with a dielectric compound having a boiling point of above ?5° C.

Abstract: A transformer winding device, a method and a transformer are disclosed. The transformer winding winding device includes a rotary device configured to extend along an axis of rotation and configured to receive a transformer winding to be wound, at least one device configured to provide a plurality of insulation strips, and a comb-like guide device. The comb-like device is configured to deflect the plurality of insulation strips into at least one common winding plane and fed parallel to one another, at an angle to an axis of rotation, to the transformer winding to be wound. The comb-like guide device can include at least a first guide device element for a first group of insulation strips and a second guide device element for a second group of insulation strips, wherein the first and second guide device elements are offset with respect to one another in terms of axial length.

Abstract: A vacuum interrupter arrangement for a circuit breaker includes a first cylindrical shaped vacuum insert within which a pair of corresponding electrical contacts is coaxially arranged. The electrical contacts include a fixed electrical contact which is attached to the first vacuum insert and an axially movable electrical contact which is operated by a pushrod. A second cylindrical shaped vacuum insert is coaxially arranged to the first cylindrical shaped vacuum insert. Both vacuum inserts are coaxially surrounded by an outer vacuum container in order to form a double contact gap version.

Abstract: An impedance matching element is disclosed which can be used for voltage and/or current sensing or indicating devices used in medium voltage systems in order to improve signal integrity of output signals in comparison with known sensing devices. To enhance sensing accuracy and provide higher output signal immunity against interferences and impedance mismatches, the electric field sensor and/or the magnetic field sensor can be connected to the impedance matching element which allows connection to an independent analogue measuring device and is powered from an energy harvester, with an impedance matching electronic board.