摘要:
An arc-control chamber gear for contact electrodes, the gear possessing openings in collars of an electrode centering cap so as to break the confinement of the electrodes and allow them to be ventilated by gas convection between the inside volume heated by the flow of current and the cooler outside volume.
摘要:
A switching device has a first contact side with a first nominal current contact piece and a first electric arc contact piece, and a second contact side with a second electric arc contact piece and a second nominal current contact piece. In order to generate a relative movement between the first and second contact sides, the first electric arc contact piece and the first nominal current contact piece as well as the second electric arc contact piece and the second nominal current contact piece are driven. For switching, the first contact piece is moved by a movement profile and the first nominal current contact piece is moved by a movement profile that differs from the movement profile of the first electric arc contact piece. A movement profile of the second electric arc contact piece and the second nominal current contact piece deviate from each other.
摘要:
An electrical power distribution assembly for an airplane, the assembly including an electric switch device for placing in a Karman fairing of the airplane.
摘要:
A gas-insulated substation having an enclosure filled with dielectric gas under pressure, comprising one electrical conductor (1) designed to be live that is of longitudinal axis (X) and placed inside the enclosure (6), and two grading shields (10, 12) surrounding in part the conductor (1), at least one of the grading shields (10) comprising a hollow electrically conductive body (14) of longitudinal axis that is substantially coaxial with the axis of the casing (6), said body (14) comprising an annular depression (22) in its outer surface and orifices (26) passing through said body (14) made in a bottom of said annular depression. Said orifices (26) ensure that the dielectric gas flows between an inside zone and a zone that is outside the grading shield (10) by convection exchange.
摘要:
Circuit breakers with a cam follower having an upper post with the cam follower held by a cross bar to prevent cam/arm misalignment during high interruption shot on the breaker. Related cam followers have an upwardly extending post located on one side edge portion and cooperates with a shunt to provide shunt separation during high interruption breaker shots.
摘要:
A switching device has a first contact side with a first nominal current contact piece and a first electric arc contact piece, and a second contact side with a second electric arc contact piece and a second nominal current contact piece. In order to generate a relative movement between the first and second contact sides, the first electric arc contact piece and the first nominal current contact piece as well as the second electric arc contact piece and the second nominal current contact piece are driven. For switching, the first contact piece is moved by a movement profile and the first nominal current contact piece is moved by a movement profile that differs from the movement profile of the first electric arc contact piece. A movement profile of the second electric arc contact piece and the second nominal current contact piece deviate from each other.
摘要:
A motor drive unit including an enclosure, a bus bar supported by the enclosure, at least one modular power unit, and a flexible connector for electrically coupling the modular power unit with the bus bar. The flexible connector includes mating male and female connector portions each mounted to a respective one of the bus bar and the modular power unit, the connector portion mounted to the modular power unit being supported by a housing mounted to the modular power unit for movement relative thereto.
摘要:
Gas insulated electrical equipment includes: a metal enclosure having an insulating gas introduced therein; a conductor that is accommodated inside the metal enclosure and to which voltage is applied; and an insulating and supporting member insulating and supporting the conductor relative to the metal enclosure. The conductor is circumferentially covered with a dielectric film, and furthermore, a nonlinear resistance film provided on the dielectric film and having a nonlinear volume resistivity decreasing when the nonlinear resistance film is acted on by an electric field higher than a critical value.
摘要:
An electric power switch suitable as a capacitor, line and load switch for transmission and distribution voltages includes an external actuator controlled by current transformers (CTs) mounted on live tanks comprising insulators forming dielectric containers that house the contactors of the switch. The CTs are located on the outside of the insulators in the regions of the insulators overlying the internal contactors between the upper and lower high voltage line taps. The actuator and controller may also be located outside the dielectric container, as desired. This configuration minimizes the size of the dielectric container and removes the severe size constraint inherent in design conventional “live tank” switch designs, while also avoiding the need for separate line-mounted CTs. This design also avoids the need for a separate grounded “dead tank” to house the CTs, which are more conveniently located in the outside of the insulators.
摘要:
The present invention relates to a vacuum switch assembly for interrupting and isolating fault current. The vacuum switch assembly includes first and second dc lines that, in use, are electrically connected to the dc output terminals of a primary dc power source and a dc network. Each dc line includes at least one vacuum switch having contacts that are opened and closed under the control of a vacuum switch controller. A passive dc power supply unit is electrically connected to the first and second dc lines and includes a secondary dc power source that provides a substantially ripple-free sensing voltage. The vacuum switch controller is adapted to open the vacuum switch contacts when a fault condition (e.g. a fault current or other fault) or an operator request has been identified and when the current flowing between the vacuum switch contacts is below a chopping current associated with the vacuum switches.