Abstract: Cell of low-voltage feed and distribution cellular switchboard, characterized in that it comprises, superimposed one above the other, horizontal metallic casings enclosing switching devices and functional units connected therewith.

Abstract: A tripping device of a circuit-breaker is detachable so as to be able to cover ranges of excess currents with a small number of calibers each represented by an interchangeable tripping device. For this purpose, the magnetic excess current detection circuits are made in two detachable parts, one fixed to the tripping device, the other installed floating on the housing of the device to be controlled whose interchangeability permits the automatic changing of the magnetic characteristics of the tripping device.

Abstract: Electrical motor-control device for electrical equipment comprising a drive mechanism including an electric motor and a movement transformation mechanism including an endless screw on which is installed a linearly displaceable nut connected with slight play to an operating member of the electrical equipment. A torque limiter is inserted between the drive mechanism and the movement transformation mechanism. The torque limiter comprises a disk made of rough material integral with a worm screw and has component parts in the form of segments of a ring connected by springs clamping the said disk made of friction material. Applications: remote control of electric circuit-breakers.

Abstract: Tripping devices, more particularly for circuit-breakers, in which a single model tripping device can be transformed by a simple operation, not requiring any dismantling, to obtain either a shunt or undervoltage type of operation. This result can be obtained by changing the relative position of a catch part of the striker, for example by rotation through 180 degrees in relation to a locking part.

Abstract: A trippiong device of a circuit-breaker is detachable so as to be able to cover ranges of excess currents with a small number of calibers each represented by an interchangeable tripping device. For this purpose, the magnetic excess current detection circuits are made in two detachable parts, one fixed to the tripping device, the other installed floating on the housing of the device to be controlled whose interchangeability permits the automatic changing of the magnetic characteristics of the tripping device.