An electrical short-circuiting device includes a fixed contact piece and a movable contact piece. The fixed and movable contact pieces are distanced from one another in a basic position and electrically conductively connected to one another in a short-circuit position. A drive transfers the movable contact piece from the basic position into the short-circuit position, and a trigger device includes an electrically driven actuator for triggering the drive.

A switch, in particular a low-voltage circuit breaker, in plug-in technology includes a withdrawal shaft to move the switch from an operating position into a removal position; a force store including a storage spring unloaded during withdrawal; and an unlatching shaft which, as the circuit breaker is withdrawn, is configured to rotate into an unlatching position, unloading of the storage spring taking place when the unlatching shaft is in the unlatching position. To permit unloading of the force store during the withdrawal, the unlatching shaft includes a driver element, spaced radially apart from its axis of rotation and configured to rest in a sliding manner on an outer contour of a rotatably mounted cam disk. The withdrawal shaft and the cam disk are connected via a connecting element which transforms the rotation of the withdrawal shaft into a corresponding rotation of the cam disk and therefore, of the unlatching shaft.

An energy accumulator (15) for or in an on-load tap changer (10) comprises a motor (11) with an output shaft (12) and a load diverter switch (13) with an input shaft (14), comprising an elastic storage element (17); a transmission coupled to the storage element (17) and having an input hub (201) that can be rotationally fixed to the output shaft (12); an output hub (231) that can be rotationally fixed to the input shaft (14); and a variable transmission (20, 21) interposed between the input hub (201) and the storage element (17).

A triggering mechanism is for a switching device, in particular for low-voltage devices and systems, medium-voltage devices and systems, and/or high-voltage devices and systems. The triggering mechanism includes a lever, equipped with two rolls for blocking purposes.

The invention concerns a drive unit for a high and medium voltage circuit breaker comprising of a main shaft being rotatable around its main axis between a first position corresponding to a closed state of the circuit breaker and a second position corresponding to an opened state of the circuit breaker, elastic means for driving the main shaft in rotation towards the second position, and releasable means for preventing the rotation of the main shaft from the second position towards the first position, wherein the releasable means comprise retention pawl which removably engages the main shaft and which, when engaged, enables the main shaft to rotate towards the second position but prevents its rotation from the second position towards the first position.

An electric circuit breaker including a spring energy store drive having a spring and a manual winding device for manually tensioning the spring. In accordance with an embodiment, the manual winding device includes a rotatable latching disk, a latching pawl arranged next to the disk, and a manual actuating device connected to the latching pawl. The latching pawl is guidable into a latching toothed portion of the disk. The pawl is also capable of moving, owing to an actuation of the actuating device. As a result, the disk is capable of rotating along a preset desired rotation direction for tensioning the spring. The latching toothed portion is asymmetrical and a force transmission from the pawl onto the disk is possible along the desired rotation direction. The disk slides along the pawl when the disk rotates along the desired rotation direction more quickly than the pawl.

An energy accumulator (15) for or in an on-load tap changer (10) comprises a motor (11) with an output shaft (12) and a load diverter switch (13) with an input shaft (14), comprising an elastic storage element (17); a transmission coupled to the storage element (17) and having an input hub (201) that can be rotationally fixed to the output shaft (12); an output hub (231) that can be rotationally fixed to the input shaft (14); and a variable transmission (20, 21) interposed between the input hub (201) and the storage element (17).

A high energy spring drive to control a high voltage circuit breaker is described. The high energy spring drive includes a closing assembly positioned at a first end and an opening assembly positioned at a second end, a charging assembly positioned between the closing and opening assembly, and a transmission assembly. The closing and opening assembly control the closing and opening of circuit breaker. The charging assembly includes a worm wheel arrangement coupled to a motor to transfer torque to a motor shaft, to energize the closing assembly, a decoupling mechanism to decouple the worm wheel arrangement from the motor shaft on energization of the closing assembly, and a cam-follower mechanism. The transmission assembly actuated by the follower of the cam-follower mechanism is to electrically close a circuit breaker when the follower rotates in a first direction and electrically open the circuit breaker when the follower rotates a second direction.

A stored energy assembly is for an electrical switching apparatus. The electrical switching apparatus includes a housing and a mount coupled to the housing. The stored energy assembly includes: a ratchet assembly having: a first ratchet member, a second ratchet member, and a shaft extending through the first ratchet member and the second ratchet member, the shaft being structured to extend through the mount; a stored energy mechanism coupled to the shaft; at least one charging mechanism structured to charge the stored energy mechanism in order to store energy; and a clutch assembly including a link assembly cooperating with the first ratchet member and the second ratchet member in order to transmit energy from the charging mechanism to the stored energy mechanism.

The control device possesses a rigid main part combining most of the functional elements of this type of control device. It is made up of two portions of a rotary shaft, having placed between them a cam and a support arm that are connected together by a pivot that is offset relative to the axis of rotation. A toothed wheel having an inner set of teeth is placed around the support arm that is provided with a rachet system. The toothed wheel has an outer set of teeth-driven by a motor, via an intermediate gearwheel. The pivot controls the compression of the actuator spring by the assembly rotating. The device is applicable to high and medium voltage circuit breakers and switches.