Areva T&d Sa

Areva T&d Ag

Tour Areva

Alstom Technology Limited

Areva T & D Sas

Xavier Allaire

Philippe Manin

Jean-Pierre Dupraz

Jean-Marc Willieme

Denis Frigiere

Michel Collet

Olivier Grejon

Wolfgang Grieshaber

Ernst Suter

Alain Fanget

Georges Doummar

Nicolas Chevillot

A control apparatus for controlling electrical switchgear, the control apparatus being designed such that it is capable of performing the following in succession:

Apparatus for controlling electrical switchgear

An arrangement for synchronizing and the actuation of a set of three interrupters, tow of which are disconnectors and one is a switch, in a combined circuit breaker and disconnector for an alternator is described. This allows for fitting of an accessory shaft for actuation purposes, which is specifically dedicated to the actuation of one of the two disconnection interrupters and to set it in rotation only after a final angle of rotation of a main shaft, which is itself dedicated to the actuation of the other disconnecting interrupter and actuation of the switching interrupter.

Combined circuit breaker and disconnector for an alternator with actuation by an assembly of a main shaft and secondaries shafts

A control device for controlling electrical switchgear such as a circuit breaker or the like includes an actuating arm having a connection point suitable for being moved along a closed line including points P, Pand P. The connection point thus moves during an opening stage for opening the moving contact, under the effect of a mechanical spring from point Pto point P. It also moves during a re-cocking stage for re-cocking the mechanical spring under the effect of a motor being switched on, and while keeping the moving contact in the open position, from point Pto point P. It also moves during a closure stage for closing the moving contact, also under the effect of the motor being switched on, from point Pto P. In this manner it is possible to successively perform three distinct stages of putting the actuating arm in motion, between the instant at which the moving contact leaves its closed position and the instant at which it returns thereto after having occupied its open position. A re-cocking stage for re-cocking the mechanical spring that is distinct from the closing stage and from the opening stage for closing and opening the moving contact, is performed, with the opening stage to be performed merely by releasing the energy that has been previously accumulated by the spring.

Control device for controlling electrical switchgear

An alternator disconnector circuit-breaker of the invention includes a cylindrical cam () for optimizing the sequence for opening/closing the switch-over first switch (), the circuit-breaker second switch (), and the disconnector third switch (). The cam () has a cylindrical wall in which three slots (), and preferably three pairs of slots, of different shapes, are defined; an end element of an element driving a respective one of the switch contacts is mounted to slide in each slot.

Actuation by cylindrical CAM of a circuit-breaker for an alternator

A first switch () has a first pair of contacts () that are mounted to move relative to each other in translation. A circuit-breaker second switch () has a second pair of contacts () that are mounted to move relative to each other in translation, the second switch () being put in parallel with the first switch (). A disconnector third switch () has a third pair of contacts () that are mounted to move relative to each other. Synchronization means (') make it possible, while breaking is taking place, for the contacts of the first switch () to separate before the contacts of the second switch () separate, the contacts of the second switch themselves separating before the third contacts () separate fully. The synchronization means are actuated by a servomotor ().

Alternator disconnector circuit-breaker by a servomotor

Operating mechanism for medium and high voltage switchgear, in which a rotatable main shaft is coupled to a switch, and a rocker plate is rotatable with the main shaft, the main shaft being arranged to open and close said switch by tilting the rocker plate. The rocker plate constitutes a plurality of force transmission levers and comprises a plurality of zones distributed around the main shaft. A rotary actuator has force transmitting means for driving the rocker plate in a direction corresponding to closing of the switch, and an opening spring for driving the rocker plate in a direction corresponding to opening of the switch. Closed switch locking means are coupled to the rocker plate () and are disposed substantially in a common plane of the rocker plate.

Growing community of inventors

Chassieu, France

Xavier Allaire