An electric switch includes a first and a second connection terminal for connecting the switch to an external circuit; a first switch assembly, which includes two or more electric breaker elements connected in series to one another and to the first and the second connection terminal; a second switch assembly, which includes at least one delayed electric breaker element connected in parallel to the first switch assembly. A moving actuator is made of insulating material and is associated with the first and the second switch assembly to open or close them. The moving actuator is movable between a closed switch position in which electrical continuity is established between the first and the second connection terminal, and an open position in which current flow between said terminals is prevented.

An electric switch includes a first and a second connection terminal for connecting the switch to an external circuit; a first switch assembly, which includes two or more electric breaker elements connected in series to one another and to the first and the second connection terminal; a second switch assembly, which includes at least one delayed electric breaker element connected in parallel to the first switch assembly. A moving actuator is made of insulating material and is associated with the first and the second switch assembly to open or close them. The moving actuator is movable between a closed switch position in which electrical continuity is established between the first and the second connection terminal, and an open position in which current flow between said terminals is prevented.

A switch operation mechanism includes: a knob configured to be rotatable about a first rotation axis; a rotor configured to be rotatable about a second rotation axis; a first transmission mechanism configured to transmit rotation of the knob to the rotor and including a slide mechanism configured to allow displacement of the knob in a first direction intersecting with the second rotation axis; and a second transmission mechanism configured to convert the displacement of the knob in the first direction into an operation of a switch.

A switch operation mechanism includes: a knob configured to be rotatable about a first rotation axis; a rotor configured to be rotatable about a second rotation axis; a first transmission mechanism configured to transmit rotation of the knob to the rotor and including a slide mechanism configured to allow displacement of the knob in a first direction intersecting with the second rotation axis; and a second transmission mechanism configured to convert the displacement of the knob in the first direction into an operation of a switch.

This application discloses a motor drive of electrical apparatuses which drives medium and high voltage switch disconnectors, circuit breakers, disconnectors, and earthing switches. The disclosed drive includes a system of reduction transmissions including a worm transmission and a cycloidal transmission located in a common housing. The axis of the output shaft of the drive is situated centrically on the axis of a wormwheel of the worm transmission, in the axis of the output gear of the cycloidal transmission and in the axis of a revolving eccentric bush. The wormwheel of the worm transmission is mounted immovably on the revolving eccentric bush on which there is mounted rotatably a gear wheel of the cycloidal transmission whose output gear is coupled with a slidable bush of a disengaging coupling mounted on the free end of the output shaft of the drive.

A tapping arrangement for a transformer, the arrangement comprising a plurality of fixed contacts, a movable rotary contact, a transition rotor with pairs of transition contacts, an interrupter coupling assembly and driving motor(s) are compacted into a single vacuum chamber.

A subassembly includes an intermediate knob serving as a first knob rotatably fitted to and supported by a middle serving as a fixing portion, a first spring and a first ball for giving a detent feeling upon a rotary movement between the middle serving as the fixing portion and the intermediate knob, a distal end knob serving as a second knob rotatably fitted to and supported by the middle serving as the fixing portion, and a second spring and a second ball for giving a detent feeling upon a rotary movement between the middle serving as the fixing portion and the distal end knob. In such a subassembly, the intermediate knob, the first spring and the first ball, and the distal end knob, the second spring and the second ball are integrally assembled as a subassembly.

A subassembly includes an intermediate knob serving as a first knob rotatably fitted to and supported by a middle serving as a fixing portion, a first spring and a first ball for giving a detent feeling upon a rotary movement between the middle serving as the fixing portion and the intermediate knob, a distal end knob serving as a second knob rotatably fitted to and supported by the middle serving as the fixing portion, and a second spring and a second ball for giving a detent feeling upon a rotary movement between the middle serving as the fixing portion and the distal end knob. In such a subassembly, the intermediate knob, the first spring and the first ball, and the distal end knob, the second spring and the second ball are integrally assembled as a subassembly.

A rotary sensor assembly comprises an indicator member adapted to rotate and having first and second axial positions, input means adapted to be actuated by movement of the indicator member, and a processor adapted to receive input from the input means. The indicator member comprises a plurality of actuator structures, and the input means comprises one or more switches adapted to be actuated by an actuator structure. Zero or more switches is/are actuated when the indicator member is moved from the first to the second axial position, this corresponding to a first switch pattern, and zero or more switches is/are actuated when the indicator member is moved from the second to the second axial position, this corresponding to a second switch pattern. Based on input from one or more switches corresponding to the first and second switch patterns, the processor is adapted to determine rotational movement of the indicator member.

The present invention relates to an electric switch comprising a first switch assembly (1) with several electric breaker elements (2a, 2b, 2c) connected in series between two connection terminals (5, 6), and a second switch assembly (4) with a electric breaker element (3) connected in parallel to the first switch assembly (1). The second switch assembly (4) has less electrical resistance than the first switch assembly (1). The switch is configured so that the second switch assembly (4) closes in a delayed manner with respect to the closing of the first switch (1). Current interruption operations are performed with the first switch assembly (1) to facilitate arc quenching, whereas in permanent working of the switch, current flows through the low electrical resistance second breaker element (4) to reduce losses due to heating. The invention also relates to a method for controlling current flow.