Abstract: A plug connector device, in particular RJ plug connector device, is proposed, with at least one wiring block which is provided for receiving at least one multi-wire data cable and comprises at least one receiving region for receiving at least one wire of the at least one data cable.

Abstract: An apparatus and method for crosstalk compensation in a jack of a modular communications connector includes a flexible printed circuit board connected to jack contacts and to connections to a network cable. The flexible printed circuit board includes conductive traces arranged as one or more couplings to provide crosstalk compensation.

Abstract: A system of unisex power cords including: a dual prong male power cord, where in the dual prong male power cord includes a first dual prong male connector at a first end and a second dual prong male connector at a second end; a female power cord, wherein the female power cord includes a first female connector at a first end and a second female connector at a second end; and a three prong male power cord, where in the three prong male power cord includes a first three prong male connector at a first end and a second three prong male connector at a second end.

Abstract: A retractable multifunctional connecting device includes a first module, a second module, and an outer casing body. The first module includes a first insulating body and a first terminal group, the first terminal group is disposed at the first insulating body. The second module includes a second insulating body and a second terminal group, the second terminal group is disposed at the second insulating body. The outer casing body houses the first module having an external portion. The outer casing body has a front end formed with an opening, a surface of the outer casing body is formed with a cleaved hole, two flanges are respectively disposed at two sides of the cleaved hole on the outer casing, the second module is limited to a position by abutting against the two flanges, and the second module moves along the two flanges.

Abstract: A connector assembly may include first and second connector bodies and a terminal splitter. The second connector body may matingly engage the first connector body. The terminal splitter may be received in at least one of the first and second connector bodies. The terminal splitter may include a body portion having first and second wires connected thereto and a blade portion extending from the body portion and including a third wire connected thereto.

Abstract: Movable end portions of cables and are fixed to a movable lead block, and fixed end portions of the cables are fixed to a fixed lead block. The movable lead block is mounted so as to be inserted into a cylindrical portion of a rotary body in a direction along a rotation center line, and the fixed lead block is mounted so as to be inserted into a lead block attachment portion of a lower housing in the direction along the rotation center line. The movable end portions and the fixed end portions of the cables are positioned at the same heights as those of the cables in a wiring space.

Abstract: A terminal reel cart that supports two reels of terminals and two terminal applicators such that the terminal applicators can be loaded with the strip of terminals and moved into position relative to a terminal station of a wire processing system. The terminal reel cart supports the reels of terminals and the terminal applicators. The reel cart includes a plurality of wheels that allow the cart to be easily moved throughout a processing facility. The reel cart includes a pair of paper take up reels that are each driven by a motor and collects the paper backing from the strip of terminals. The paper take up reels are driven by a drive motor on the wire processing system.

Abstract: A gas laser oscillation device includes a discharge part, a blower part, and a laser gas path. The discharge part excites a laser gas medium and the blower part blows the laser gas. The laser gas path forms the circulation path of the laser gas between the discharge part and the blower part. The blower part includes an impeller section, a drive section, and an intermediate chamber disposed between the impeller section and the drive section. In the impeller section, a rotating blade to be rotated by a drive section via a rotating shaft is disposed. In the intermediate chamber, a main space and a gas damper space are partially partitioned by a gas shielding member.

Abstract: A laser device provided with the function of predicting occurrence of condensation and preventing occurrence of condensation in advance. The laser device is provided with a controlling part calculating a reference temperature for judging whether a cooling water feed device may feed cooling water based on a temperature measured by a thermometer and a humidity measured by a hygrometer, and a comparing part comparing a reference temperature and a cooling water temperature. The cooling water feed device is configured to stop the feed of cooling water after a command for starting up the laser oscillator has been output and the cooling water temperature is lower than the reference temperature and to start or continue the feed of cooling water when the cooling water temperature is the reference temperature or more.

Abstract: An example device in accordance with an aspect of the present disclosure includes a ring waveguide and bus waveguide. The ring waveguide has a first coupled portion associated with a first modal index, and the bus waveguide includes a second coupled portion associated with a second modal index. The second coupled portion is evanescently coupleable to the first coupled portion. A laser outcoupling and associated lasing output of the device is variable based on varying a difference between the first modal index and the second modal index to vary coupling between the first coupled portion and the second coupled portion, without varying modal indices of non-coupled portions of the ring waveguide and bus waveguide.

Abstract: A laser including a solid state laser gain medium having a D-shaped cross section and an unstable resonator laser cavity including the solid state laser gain medium configured with a geometric magnification in a range of 1 to 5 under the intended operating conditions, including the effects of thermal lensing in the gain medium. An optical switching device in the unstable resonator laser cavity generates a pulse duration in the range of 0.05 to 100 nanoseconds. A diode-pump source is configured to inject pump light through the curved or barrel surface of the D-shaped gain medium.

Abstract: A residual light removal structure 70 is used to remove residual light in a double-clad fiber 40 having a core 60, a cladding 62 having a refractive index lower than a refractive index of the core 60, and a covering material 64 having a refractive index lower than the refractive index of the cladding 62. The residual light removal structure 70 has a fiber housing 72 that houses part of the double-clad fiber 40, a cladding exposure portion 74 in which part of the whole circumference of the cladding 62 is exposed from the covering material 64 along a longitudinal direction of the double-clad fiber 40, and a resin 76 filled within the fiber housing 72 so as to cover at least the cladding exposure portion 74. The resin 76 has a refractive index that is equal to or higher than the refractive index of the cladding 62. For example, the cladding exposure portion is formed with a range of angles less than 180° about an axis of the double-clad fiber 40 in a cross-section perpendicular to the axis.

Abstract: A leakage light removal structure 70 is used to remove leakage light in an optical fiber 140 having a core 160, a cladding 162 having a refractive index lower than the core 160, and a covering material 164 having a refractive index higher than the cladding 162. The leakage light removal structure 70 has a fiber housing 72 that houses part of the optical fiber 140, a covering material, extension portion 175 covering part of a whole circumference of the cladding 162 by extending part of the covering material 164 along a longitudinal direction of the optical fiber 140 within the fiber housing 72, and a cladding exposure portion 174 in which a portion of the whole circumference of the cladding 162 other than the covering material extension portion 175 is exposed within the fiber housing 72.

Abstract: A method for managing the broad band microwave and TeraHertz (THz) radiation in a free electron laser (FEL) having a wiggler producing power in the electromagnetic spectrum. The method includes placement of broadband microwave and TeraHertz (THz) radiation absorbers on the upstream end of the wiggler. The absorbers dampen the bounced back, broad band microwave and THz radiation returning from the surfaces outside the nose of the cookie-cutter and thus preventing broadening of the electron beam pulse's narrow longitudinal energy distribution. Broadening diminishes the ultimate laser power from the wiggler. The broadband microwave and THz radiation absorbers are placed on either side of the slot in the cookie-cutter that shapes the wake field wave of the electron pulse to the slot shape of the wiggler chamber aperture. The broad band microwave and THz radiation absorber is preferably a non-porous pyrolytic grade of graphite with small grain size.

Abstract: A laser apparatus may include a beam splitter configured to split a pulse laser beam into a first beam path and a second beam path, an optical sensor provided in the first beam path, an amplifier including an amplification region provided in the second beam path and being configured to amplify and emit the pulse laser beam incident thereon along the second beam path, a wavefront controller provided in the second beam path between the beam splitter and the amplifier, and a processor configured to receive an output signal from the optical sensor and transmit a control signal to the wavefront controller.

Abstract: An external cavity laser apparatus according to an embodiment of the invention is provided. The external cavity laser apparatus includes a plurality of beam emitters that collectively emit a plurality of emitted beams that each includes a primary component emitted beam. A first reflective element is configured to reflect the plurality of primary component emitted beams and a first polarizing optic disposed in the optical path of the plurality of primary component emitted beams is configured to rotate a polarization of each primary component emitted beam to produce a first rotated primary component beam having a first linear polarization and a second rotated primary component beam having a second linear polarization. A polarized beam splitter is configured to direct first feedback system output component beams into an output beam, and to direct second feedback system output component beams to the plurality of beam emitters as feedback beams.

Abstract: The disclosure herein generally relates to a system (10) for converting an input light (12) into an output light beam (14) that has a spatial beam quality that is greater than that of the input light (12). The system (10) comprises an optical resonator having disposed therein a Raman crystal (20). The Raman crystal (20) is for receiving the input light (12) and the optical resonator is configured to resonate a Stokes light beam (22) generated from the input light (12) by at least one nonlinear interaction within the Raman crystal (20). The at least one nonlinear interaction comprises at least one Raman interaction. The Stokes light beam (22) has a spatial beam quality that is greater than that of the input light (12). The system (10) comprises a light extractor (18) arranged to generate the output light beam (14) by extracting at least some of the Stokes light beam (22) from the optical resonator.

Abstract: An optical device includes a semiconductor element configured to emit emission light or to receive incident light, including a first fitting part including a portion having a convex shape in a first region; an optical member arranged on an optical path of the emission light emitted from the semiconductor element or the incident light entering the semiconductor element, including a second fitting part fitted to at least a part of the portion having the convex shape, the first region being opposed to the optical member; and a joint part that joins the semiconductor element and the optical member, arranged between the first fitting part and the second fitting part.

Abstract: A method for production of an optoelectronic device includes fabricating a plurality of vertical emitters on a semiconductor substrate. Respective top surfaces of the emitters are bonded to a heat sink, after which the semiconductor substrate is removed below respective bottom surfaces of the emitters. Both anode and cathode contacts are attached to the bottom surfaces so as to drive the emitters to emit light from the bottom surfaces. In another embodiment, the upper surface of a semiconductor substrate is bonded to a carrier substrate having through-holes that are aligned with respective top surfaces of the emitters, after which the semiconductor substrate is removed below respective bottom surfaces of the emitters, and the respective bottom surfaces of the emitters are bonded to a heat sink.

Abstract: A multi-wavelength laser light source includes a gain waveguide having a gain medium and a first mirror; and a waveguide wavelength filter, wherein the waveguide wavelength filter comprises: a first optical waveguide coupled to an end of the gain waveguide opposite to the first mirror,a plurality of ring resonators having input ports coupled to the first optical waveguide and having resonance wavelengths different from each other,a plurality of output waveguides coupled to respective output ports of the plurality of ring resonators, and second mirrors configured to correspondingly reflect, back to the plurality of ring resonators, at least part of light that has traveled via the output waveguides from the plurality of ring resonators.

Abstract: An integrated semiconductor laser device includes: a semiconductor laser including a first active layer; a semiconductor optical amplifier including a second active layer and configured to amplify output laser light of the semiconductor laser; and a substrate on which the semiconductor laser and the semiconductor optical amplifier are integrated. The first active layer and the second active layer each include a multiple quantum well structure, and the second active layer includes a larger number of quantum wells than the first active layer.

Abstract: A micromechanically produced optical device includes: a carrier for carrying the micromechanically produced device; a diffraction grating for diffracting light; a plate for carrying the diffraction grating; and deflectors for deflecting the plate in relation to the carrier, the deflectors comprising bearings for movably bearing the plate and a driver for moving the plate; the deflectors being configured for rotational deflection of the plate and for translational deflection of the plate.

Abstract: A circuit breaker panel board includes a housing including a door structured to open, a circuit breaker receiving area disposed in an interior area of the housing, and at least one illumination unit disposed outside the circuit breaker receiving area and including at least one light oriented to provide light in a direction of the circuit breaker receiving area.

Abstract: An automatic switching interface box for generators in residential dwellings and small commercial applications provides a breaker box transfer switch for generators powering one or more electrical loads. In power blackout situations, the breaker box transfer switch uses a power control relay to keep the load power on, which eliminates the need for a hot generator plug, because the plug in box is not powered. The generator power output cord is plugged onto the male plug of the interface box, or hard wired thereto. If the auxiliary generator had been started and is at rated voltage, the load is immediately and automatically switched from the utility connection to the generator as electrical source. The relay keeps the prongs of the male plug safely unpowered until the generator is attached since the relay coil is powered by the generator output and the plug is connected to the normally open contacts.

Abstract: Applicators and methods for applying a conductor cover to a cable, the conductor cover being tubular and split longitudinally to define a first longitudinal edge and a second longitudinal edge. The applicator comprises: a structural element; a spool connected to rotate relative to the structural element, the spool being sized to store the conductor cover in a pre-application state where the conductor cover is wrapped one or more times around the spool with the first longitudinal edge and the second longitudinal edge of the conductor cover spread open and perpendicular to a spool axis; and a lock for holding the conductor cover in the pre-application state.

Abstract: A wire gripper having a lightweight feeling and enabling attaching work to a wire-like body to be performed easily and safely, which comprises: a fixed gripping body having a wire-like body pressing-down portion; a swinging member; a movable gripping body having a wire-like body holding portion; and a connection member coupled to the swinging member by a connection member swinging shaft and allowing the swinging member to swing. A wire gripper main body is provided with an first-finger hooking portion in a connection member guiding portion for guiding the connection member when pulling the connection member and attached with a grip portion in a freely swingably movable manner, on the side toward which the connection member is pulled, so that the grip portion faces the first-finger hooking portion. The grip portion is structured so as to be able to apply tension in order to pull the connection member.

Abstract: Apparatus and method for extracting the core and surrounding insulator from an outer sheath of a length of data transmission cable is disclosed. The apparatus comprises a pump operable to generate hydraulic pressure against one end of the core and insulator, and a drawing mechanism operable to simultaneously exert a pulling force on an opposite end of the core and insulator. The arrangement being such that hydraulic pressure applied to one end, and pulling force applied to the opposite end, together displace the core and insulator relative to its outer sheath.

Abstract: A safety cover system for a household electrical switch or outlet is provided. A wall plate is provided having an aperture for an electrical device such as an outlet or switch. The wall plate has a rim with upper and lower locking lips. A cover plate is provided that is pivotally connected to the wall plate by hinges for covering the wall plate. There is provided upper, lower and side release mechanisms. Each release mechanism includes a release button with a portion of the release button exposed to an exterior of the cover plate through an aperture in the cover plate. The release also includes a latch connected with the button having an arm overlapping the wall plate rim lip to prevent the cover plate from being pivoted open from the wall plate.

Abstract: Insulator integrated framings for power lines and kits for assembling same are disclosed. The framings have retaining member assemblies configured to retain power line wires and conductors, separated from power line support structures and other retaining member assemblies by insulators.

Abstract: A utility enclosure includes a box having a plurality of walls and a central opening. An insert is positioned in the central opening and includes a plurality of connected side walls. A removable cover is connected to the insert. A removable lid is connected to the box.

Abstract: A current detection device for detecting an electric current flowing through an inverter, an overcurrent level generation device for generating an abnormality judgment reference value, an overcurrent detection device for generating an interruption signal to the inverter on the basis of an output of the current detection device and the abnormality judgment reference value, and an adjusting apparatus for correcting the abnormality judgment reference value of the overcurrent level generation device on the basis of the output at a time when a constant electric current is applied to the current detection device are provided. The overcurrent level generating device is provided with one or a plurality of resistance value adjusting sections, and generates the abnormality judgment reference value in correspondence to a resistance value of the resistance value adjusting section.

Abstract: A fuse box that is designed to prevent damage caused by arc faults and electrical overcurrent. The apparatus is configured to function as a circuit breaker. The apparatus includes a housing, a circuit breaker, an optical sensor, and an electronic controller. The housing is an enclosure that isolates the circuit breaker from light and protects the components from physical damage. The circuit breaker opens the circuit between connected electrical systems when arc fault or an electrical overcurrent is detected. The optical sensor detects arc faults and relays notifications to the electronic controller. The electronic controller enables a user to set the thresholds for arc faults, currents, and voltages that cause the circuit breaker to open.

Abstract: A direct current arc fault detector includes a first current sensor sensing an alternating current component of current flowing in a DC power circuit; a second current sensor sensing a DC component of the current; and a bandpass filter filtering the sensed AC component. A demodulating logarithmic amplifier includes an input of the filtered AC component, and an output. An integrator or minimum detector includes an input connected to the amplifier output, and an output. A processor repetitively inputs and then resets the integrator or minimum detector output, and determines an arc when, for a predetermined time: the sensed DC component being greater than a first predetermined value, and a present value of the integrator or minimum detector output being greater than or different from a previous value of such output by more than a second predetermined value, or the present value being greater than a third predetermined value.

Abstract: The invention relates to a method and to a device for shutting down an installation part provided with connected equipment in an ungrounded power supply system in case of an insulation fault in a direct-current circuit connected to the installation part to be shut down. The invention is based on first determining the insulation resistance of the IT power supply system and measuring the displacement direct voltage present in the IT power supply system and then determining by combined evaluation of the measured results if there is a risk of an disruptive influence on the operating behavior of the connected equipment due to the displacement direct voltage occurring during the duration of a predeterminable time interval. If a disruptive influence is to be expected, the installation part exhibiting the insulation fault is immediately shut down together with the direct-current circuit and the equipment connected thereto.

Abstract: In accordance with an embodiment, a circuit includes a snubber circuit configured to be coupled to outputs of n half-bridge driver circuits that are coupled to n corresponding inductive loads, such that n is an integer greater than one. The snubber circuit includes n diodes and n capacitors. Each of the n diodes are coupled between a corresponding output of the n half-bridge driver circuits and a floating common node, and each of the n capacitors coupled between a corresponding output of the n half-bridge driver circuits and the floating common node.

Abstract: Some embodiments of the present disclosure relate to a direct current circuit breaker capable of shortening a cut-off operation time and reducing a magnitude of a required reverse current. The direct current circuit breaker includes: a main circuit line which is connected between a power supply and a load, the main circuit line includes a main breaker and a first diode connected in parallel; a charging circuit line which is disposed in the rear stage of the main breaker and is connected in parallel to the load, the charging circuit line includes a first capacitor, a reactor and a second diode connected in series; and a switch line including one end connected in parallel to the front stage of the main breaker and the other end connected between the reactor and the second diode, the switch line includes a third diode and a current switch connected in series.

Abstract: A power interrupting device has: an output terminal connected to a load; interruption circuits connected in parallel between a power source and the output terminal; and a control device controlling each interruption circuit. Each interruption circuit has: a switch element connected between the power source and an intermediate node, and ON/OFF controlled by an interruption signal output from the control device; and a rectifier connected such that a forward direction thereof is from the intermediate node to the output terminal. The control device sets the interruption circuits as a diagnosis target circuit in turn. The control device sets the interruption signal output to each interruption circuit such that the switch element of the diagnosis target circuit is OFF. Moreover, the control device determines, based on a voltage of the intermediate node of the diagnosis target circuit, whether an abnormality occurs in the diagnosis target circuit.

Abstract: A method for detecting an abnormality in a relay that can detect that a module relay is inoperative is provided. In a method for detecting an abnormality in a relay in a battery pack comprising a plurality of battery modules connected in parallel to each other and comprising a main relay and module relays, the main relay is shut off if it is determined that a current is flowing in a battery module for which the module relay is not shut off and a current is flowing in a battery module for which the module relay is shut off.

Abstract: A circuit breaking arrangement is adapted to be connected to a current path in at least one transmission line arranged to carry an electrical current for controllably effecting discontinuation of flow of electrical current in the at least one transmission line. The circuit breaking arrangement includes a plurality of series connections of a plurality of power semiconductor switching elements. The plurality of series connections of power semiconductor switching elements are connected in parallel relatively to each other.

Abstract: Described herein are a protecting circuit and an integrated circuit capable of discharging electric current sufficient for an input voltage having a large time variation while suppressing power consumption. The protecting circuit includes: a first shunt circuit including a first shunt pathway connected to an input terminal, the first shunt circuit being configured to have a relatively low discharge capacity of the first shunt pathway and a relatively long response time; a second shunt circuit including a second shunt pathway connected to the input terminal, the second shunt circuit being configured to have a relatively high discharge capacity of the second shunt pathway and a relatively short response time; and a control circuit configured to enable the second shunt pathway to discharge based on a time variation of an input voltage at the input terminal.

Abstract: An inrush current suppression circuit suppresses an inrush current to flow through a load including an input capacitor connected to a power source and a pair of output terminals which are parallel-connected to the input capacitor and output an input current. The inrush current suppression circuit includes a switching element connected to the power source; at least one of a first inductor connected between the switching element and a connection point of connecting one of the pair of output terminals and one electrode of the input capacitor and a second inductor connected between an anode of the diode and a connection point of connecting the other electrode of the input capacitor and the other of the pair of output terminals; and a diode whose cathode is connected to a connection point of connecting the switching element and the first inductor.

Abstract: Apparatus and methods for electrostatic discharge (ESD) protection of radio frequency circuits are provided. In certain configurations, an integrated circuit includes a first pin, a second pin, a forward ESD protection circuit, and a reverse ESD protection circuit. The forward ESD protection circuit includes one or more P+/N-EPI diodes, one or more ESD protection devices, and one or more P-EPI/N+ diodes electrically connected in series between the first pin and the second pin. A first P+/N-EPI diode of the one or more P+/N-EPI diodes includes an anode electrically connected to the first pin. The reverse ESD protection circuit comprising one or more P+/N-EPI diodes, one or more ESD protection devices, and one or more P-EPI/N+ diodes electrically connected in series between the second pin and the first pin. A first P-EPI/N+ diode of the one or more P-EPI/N+ diodes includes a cathode electrically connected to the first pin.

Abstract: USB interface and charging port controller integrated circuits and systems are presented for interfacing USB power and data signaling with a host circuit, in which an ESD protection diode is integrated in the IC, having an anode connected to a data terminal of the IC and a cathode connected to the positive USB bus voltage terminal for directing ESD transient current from the data terminal to the USB bus voltage terminal for dissipation to an external bus capacitance connected between the USB bus voltage terminal and a USB ground node on a host system circuit board.

Abstract: The purpose of the present invention is to enable use of a solenoid-type electromagnetic valve (120) in a valve driving device (10) that performs wireless communication. A contact signal converter (110) that converts an on-off contact signal to a control signal for operating a solenoid-type electromagnetic valve (120) comprises an explosion protection barrier (115) which restricts the current of the control signal to be no more than a maximum current established for safety regarding solenoid-type electromagnetic valves (120), and a group of batteries (111), the number of which can ensure a voltage at which the voltage supplied via the explosion protection barrier (115) surpasses the operating voltage of the solenoid-type electromagnetic valve (120).

Abstract: An electrical network configured to suppress voltage transients includes a capacitor and an electrical impedance in parallel with a diode. The capacitor is in series with the parallel connected diode and electrical impedance. The electrical network is configured to suppress voltage transients occurring across the series combination of the capacitor and the parallel connected diode and electrical impedance.

Abstract: Apparatus and methods for electrostatic discharge (ESD) protection of radio frequency circuits are provided. In certain configurations, an ESD protection circuit includes two or more pairs of field effect transistors (FETs) electrically connected in series between a radio frequency signal pin and a radio frequency ground pin. Each of the two or more pairs of FETs includes a negative ESD protection FET for providing protection from negative polarity ESD events and a positive ESD protection FET for providing protection from positive polarity ESD events. The source and gate of the negative ESD protection FET are electrically connected to one another, and the source and gate of the positive ESD protection FET are electrically connected to one another. Additionally, the drains of the negative and positive ESD protection FETs are electrically connected to one another. The ESD protection circuit exhibits a relatively low capacitance and flat capacitance versus voltage characteristic.

Abstract: The disclosed embodiments provide a charging device. The charging device includes a battery, a first physical port and a management apparatus. The management apparatus determines a first type and a first state of a first load device connected to the first physical port and allocates power supplied to the first load device through the first physical port according to the first type and the first state of the first load device.

Abstract: A multi-terminal DC electrical network comprises a plurality of DC terminals, each DC terminal operatively connected to at least one other DC terminal via a respective DC power transmission medium; a plurality of converters, each converter being operatively connected to a respective one of the DC terminals, the plurality of converters including at least one designated converter; and a controller including a solver configured to use an algorithm to process a plurality of values to compute a no-load DC voltage for a first designated converter as a function of the plurality of values. The plurality of values include a first value defining an operating mode of each designated converter; a second value defining a default electrical characteristic of the multi-terminal DC electrical network or a computation parameter of the algorithm; and a third value defining an electrical measurement corresponding to a voltage or current in the multi-terminal DC electrical network.

Abstract: Techniques for managing connections within an energy generation network may be provided. Real-time data associated with network-connected energy generation devices at a location may be collected to determine communication channels between the devices. If it is determined that an inverter of the network is solar-powered, a wizard application may be launched to help a technician determine whether a meter will lose connectivity with a gateway device. The wizard application may provide instructions to power down the inverter. Once the inverter is powered down, it may be determined whether the metering device has lost its network connection with the gateway. If so, an instruction to install a repeater device during the installation may be provided.

Abstract: A device for supplying electricity to at least one secondary electric load (30) on-board a turbomachine rotor (12) including a main circuit for transmitting main electric power to at least one main on-board electrical load (16), includes a device (15) for rotatably and electrically connecting the stator and the rotor, and at least one secondary circuit for transmitting a secondary electric power including at least one secondary conductor (28) of the stator connected to a secondary electric power source (29) suitable for outputting a secondary power in the form of a power signal with a secondary frequency selected such as to enable selective, interference-free transmission of the secondary power via the rotary electric connection device (15), separately from the main power transmission.