A device for switching medium and/or high voltages has a spring-loaded drive for driving a kinematic chain. At least one energy storage spring and at least one damping element for generating a drive movement with specific drive characteristics are included. The at least one damping element is an active damping element. The damping is actively determined during switching or it is predetermined, in particular depending on environmental variables and/or the type of switching situation, by changing the settings of the at least one damping element.

A device for switching medium and/or high voltages has a spring-loaded drive for driving a kinematic chain. At least one energy storage spring and at least one damping element for generating a drive movement with specific drive characteristics are included. The at least one damping element is an active damping element. The damping is actively determined during switching or it is predetermined, in particular depending on environmental variables and/or the type of switching situation, by changing the settings of the at least one damping element.

An operating device includes: a lever rotatable about a rotating axis; a first torsion bar extending in a first direction along the rotating axis; a second torsion bar provided inside the first torsion bar, extending along the rotating axis, coupled to the first torsion bar at a portion located farther in the first direction than the lever, and extending from the portion of coupling with the first torsion bar toward a second direction opposite to the first direction beyond the lever; and a third torsion bar surrounding the second torsion bar, having a tubular shape, coupled to the second torsion bar at a portion located farther in the second direction than the lever, and extending from the portion of coupling with the second torsion bar in the first direction.

An operating device includes: a lever rotatable about a rotating axis; a first torsion bar extending in a first direction along the rotating axis; a second torsion bar provided inside the first torsion bar, extending along the rotating axis, coupled to the first torsion bar at a portion located farther in the first direction than the lever, and extending from the portion of coupling with the first torsion bar toward a second direction opposite to the first direction beyond the lever; and a third torsion bar surrounding the second torsion bar, having a tubular shape, coupled to the second torsion bar at a portion located farther in the second direction than the lever, and extending from the portion of coupling with the second torsion bar in the first direction.

A residual load circuit breaker (1) includes a rotary switch body (23), which includes a contact blade (24, 25, 26, 27), that is rotatable about an axis (A) and is arranged between a feed line connection (20) and a discharge line connection (21), and includes end-side contact surfaces (28, 29, 30, 31) protruding in a radial direction. The contact surfaces, in a closed rotary position (S1) of the rotary switch body (23), are in touching contact with the feed line connection (20) and with the discharge line connection (21). In an open rotary position (S2) of the rotary switch body (23), the contact surfaces are each spaced with respect to the feed line connection (20) and with the discharge line connection (21). The residual load isolating switch (1) is rotationally limited in one rotational direction for performing switching movements and can be actuated unidirectionally and cyclically.

The invention relates to an electrical switch device comprising contacts which are mobile through actuation of a first rotation shaft (10) and a control mechanism (1) for the mobile contacts which is situated in a housing and which can be rearmed via a second rotation shaft (20). The first rotation shaft (10) passes through a first wall (2, 3) of the housing and the device comprises a first rotation sensor (12) coupled with the first rotation shaft (10) outside of the housing, so as to measure the angular displacement of the first rotation shaft. The second rotation shaft (20) passes through a second wall (2, 3) of the housing and the device comprises a rearming module (25, 26) removably fixed outside of the housing against the second wall (2, 3), so as to be coupled with the second rotation shaft (20) to be able to rearm the control mechanism.

The invention relates to an electrical switch device comprising contacts which are mobile through actuation of a first rotation shaft (10) and a control mechanism (1) for the mobile contacts which is situated in a housing and which can be rearmed via a second rotation shaft (20). The first rotation shaft (10) passes through a first wall (2, 3) of the housing and the device comprises a first rotation sensor (12) coupled with the first rotation shaft (10) outside of the housing, so as to measure the angular displacement of the first rotation shaft. The second rotation shaft (20) passes through a second wall (2, 3) of the housing and the device comprises a rearming module (25, 26) removably fixed outside of the housing against the second wall (2, 3), so as to be coupled with the second rotation shaft (20) to be able to rearm the control mechanism.

An on-load tap changer is provided having a plurality of modules, each of which is operable to change taps in a transformer winding. The tap changer includes a motor connected to rotate at least one shaft. The at least one shaft is connected to the tap change modules and is operable upon rotation to cause the tap change modules to each perform a sequence of operations that effectuate a tap change. A multi-turn absolute encoder is connected to the at least one shaft. A monitoring system is connected to the encoder and is operable to determine from the position of the at least one shaft where the tap change modules are in the sequence of operations.

An on-load tap changer is provided having a plurality of modules, each of which is operable to change taps in a transformer winding. The tap changer includes a motor connected to rotate at least one shaft. The at least one shaft is connected to the tap change modules and is operable upon rotation to cause the tap change modules to each perform a sequence of operations that effectuate a tap change. A multi-turn absolute encoder is connected to the at least one shaft. A monitoring system is connected to the encoder and is operable to determine from the position of the at least one shaft where the tap change modules are in the sequence of operations.

A power transfer switch suitable as a bypass switch connecting a utility feed to a load comprises a bi-stable actuator selectively driven by a compression means charged by a handle. A latch retains the actuator until suitable power source conditions are detected to allow the transfer to proceed. The controller releases the latch and the actuator abuts breakers in sequence to effect a reliable make-before-break or break-before-make transfer.