Gec Alsthom T&d Sa

Gec Alsthom T & D, Inc.

Jean-Michel Plat

Jean-Marc Willieme

Edmond Thuries

The interlock control for a circuit breaker and a disconnector comprises a moving bar for opening or closing the circuit breaker and a displacement rod for displacing a disconnector rod to open or close the disconnector. The moving bar is driven by an arm which is secured to an outlet shaft and which is rotatable in a plane perpendicular to the outlet shaft, and the displacement rod is driven via an L-shaped piece which is movable about an axis that is substantially parallel to the outlet shaft, the arm driving the L-shaped piece during a second opening or closing stage of the circuit breaker via a wheel which is fixed to the arm and which slides in a notch of the L-shaped piece. The outlet shaft makes it possible to achieve interlocking by means of a single control, thereby providing a high level of reliability and of safety.

Interlock control for a circuit breaker and a disconnector

The generator circuit breaker includes synchronization means for separating its main contacts before its arcing contacts are separated. It has a lever which is hinged at one of its ends to a fixed contact piece and which is constrained to move firstly with the moving main contact and secondly with the moving arcing contact by means of a spring, and with a ramp having two horizontal levels interconnected by a sloping intermediate portion, the ramp serving as a sliding support for a trigger member which prevents or authorizes movement of the moving arcing contact. This organization makes it possible for the moving contacts to be synchronized mechanically in simple and single manner.

Generator circuit breaker

A circuit-breaker including main contacts and arcing contacts includes a shaft carrying a first lever connected to the moving main contact. A hub is mounted inside the shaft and carries a second lever connected to the moving arcing contact; the shaft and the hub being shaped over a certain portion into two sectors between which a spring is disposed. A single control causes the shaft to rotate so that the shaft firstly causes the hub to rotate via the spring, the shaft and the hub rotating respectively causing the moving main contact and the moving arcing contact to move, and the shaft secondly rotates to a further extent, with the hub being prevented from rotating by action from an abutment. This arrangement makes it possible to implement a simple synchronization of the main contacts opening before the arcing contacts.

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Estrablin, France

Jean-Michel Plat