A high-voltage power switch, preferably with a dead tank design, contains: a switching unit that has a switching device and an actuation element that is axially movable in relation to a longitudinal axis of the switching device to actuate the switching device and a closing resistor unit that has a closing resistor arrangement and an adjusting element that is axially movable in relation to a longitudinal axis of this closing resistor arrangement to actuate the closing resistor arrangement. The actuation element is coupled to the adjusting element in order to move the latter. Accordingly, the longitudinal axis of the switching unit and the longitudinal axis of the closing resistor unit are spaced apart, and the actuation and adjusting elements are coupled by a coupling device of the high-voltage power switch.

An electrical switch gear assembly is provided. The assembly includes two or more insulators, a frame, and a single pivot axis. The two or more insulators are connected to the frame. The frame has a first beam and a second beam with the single pivot axis securing the first and second beams to one another so that the first and second beams can move in a scissors action between a folded state and an unfolded state about the single pivot axis.

A socket structure includes a base; a slot, disposed on one end of the base and to be connected to one plug having one row of terminals; a tongue disposed on a front end of the base and within the slot so that chambers of the slot on two sides of the tongue may be normally and oppositely inserted and positioned into the slot; one row of first contacts separately arranged on one surface of the tongue, wherein each first contact is electrically connected to a first pin extending out of the base; and one row of second contacts separately arranged on the other surface of the tongue. Each second contact is electrically connected to a second pin extending out of the base. When the plug is inserted into the slot, the row of terminals of the plug are electrically connected to the row of first or second contacts.

The invention relates to a single-phase, equipotential, self-powered recloser with a load life of more than 20 years, for installing in 15 KV medium-voltage networks, directly on Matthews-type fuse bases, using hooksticks, and without requiring the interruption of the energy supply. Said recloser uses a bistable electromagnetic actuator that controls a vacuum bulb for interrupting the current in the event of a fault. It stores energy in ultracapacitor banks which receive the first charge by means of an induction coil.

The invention relates to a single-phase, equipotential, self-powered recloser with a load life of more than 20 years, for installing in 15 KV medium-voltage networks, directly on Matthews-type fuse bases, using hooksticks, and without requiring the interruption of the energy supply. Said recloser uses a bistable electromagnetic actuator that controls a vacuum bulb for interrupting the current in the event of a fault. It stores energy in ultracapacitor banks which receive the first charge by means of an induction coil.

The present invention discloses a system for limiting a peak current of short-circuit current, which comprises a first a first high-frequency branch configured to provide a first high-frequency current to a first switch (1SKa) of a first phase branch of a three-phase AC when the first phase branch occurs a short-circuit, wherein the first high-frequency current is configured to cause a zero-crossing point of a short-circuit current to appear before a zero-crossing point of the three-phase AC; a second high-frequency branch configured to provide a second high-frequency current to a second switch (1SKc) of a second phase branch of the three-phase AC when the second phase branch occurs a short-circuit, wherein the second high-frequency current is configured to cause a zero-crossing point of a short-circuit current to appear before a zero-crossing point of the three-phase AC, a third phase branch of the three-phase AC connected in parallel with the first phase branch and the second phase branch and configured to always supply power. The present invention superimposes the high-frequency current on the original short-circuit current of the switch, thereby the total time from the arc generation to extinction at the zero-crossing point and then to the judgement by the control system is shorter than the time that the short-circuit current peak appears. Therefore, it can effectively lower the damage of the short-circuit current peak to the dynamic stability of the switch and lower the impact on system equipment.

A switch for medium voltage applications is provided. The switch comprises a vacuum interrupter having a fixed contact, a movable contact movable in a first direction to and away from the fixed contact between a closed position and an open position, and a drive rod arranged to the movable contact for moving the contact between the closed position and the open position. The switch further comprises a changeover switch having a first terminal body, a second terminal body, an elongated pole body, and an operating rod. The elongate pole body is hinged with a first end to the first terminal body and rotatable between a connected position in which the second end of the pole body is in direct electrical contact with the second terminal body and a disconnected position in which the second end is disconnected from the second terminal body.

A circuit breaker includes a vacuum interrupter. The interrupter includes a first movable electrode to which a first contact is connected and a second movable electrode to which a second contact is connected. The interrupter is operable between an open state and a closed state. In the open state, the first contact and the second contact are separated by a contact gap distance. In the closed state, the first contact and the second contact touch each other. The circuit breaker includes an ultrafast actuator operatively connected to each of the first and second movable electrodes. The ultrafast actuator is configured to change the vacuum interrupter from the closed state to the open state by simultaneously moving the first contact in a first direction along a first distance portion of the contact gap, and the second contact in a second direction along a second distance portion of the contact gap.

A circuit breaker includes a vacuum interrupter. The interrupter includes a first movable electrode to which a first contact is connected and a second movable electrode to which a second contact is connected. The interrupter is operable between an open state and a closed state. In the open state, the first contact and the second contact are separated by a contact gap distance. In the closed state, the first contact and the second contact touch each other. The circuit breaker includes an ultrafast actuator operatively connected to each of the first and second movable electrodes. The ultrafast actuator is configured to change the vacuum interrupter from the closed state to the open state by simultaneously moving the first contact in a first direction along a first distance portion of the contact gap, and the second contact in a second direction along a second distance portion of the contact gap.

An actuator, which is a part of a combination that includes a pair of circuit interrupters, advantageously employs a plurality of Thomson coils that are electrically connected in parallel and that interact with a corresponding set of Thomson plates of a rotatable armature in order to perform useful work in a rapid fashion. In one embodiment, the useful work is to commutate current from one circuit interrupter to the other.