A switching device including at least one first terminal and at least one second terminal, at least one actuation unit including an electrovalve and an actuator which is integral with a contact plate which is able to move from a first position, in which it is in contact with both the at least one first terminal and the at least one second terminal thereby bringing them into electrical contact, to a second end stroke position, in which it is offset from the at least one first terminal and at least one second terminal, where the electrovalve is arranged to command the actuator, thereby moving the contact plate between the first end stroke position and the second end stroke position, the at least one first terminal and at least one second terminal including retractable electrical contacts which are retractable within a respective housing against the action of an elastic element.

A switchgear apparatus (1) comprising a switching unit (2) comprising one or more electric poles (21), a truck assembly (4), on which said switching unit is mounted, said truck assembly being movable with respect to a supporting frame (3), actuation means (5) for moving said truck assembly, said switching unit being reversibly movable between an insertion position (A), at which said switching unit is electrically connected to an electric line, and a withdrawal position (B), at which said switching unit is electrically disconnected from said electric line and an electro-mechanical signalling arrangement (6) that is mounted on said truck assembly, said electromechanical signalling arrangement interacting with said actuation means to provide electric signals indicative of the position of the switching unit at said insertion position (A), at said withdrawal position (B) or at an intermediate position (C) that is different from said insertion position and said withdrawal position. The electro-mechanical signalling arrangement comprises an auxiliary contact device (7) of the rotational type and a first and second signalling mechanism (8, 9) to actuate said auxiliary contact device.

A switchgear apparatus (1) comprising a switching unit (2) comprising one or more electric poles (21), a truck assembly (4), on which said switching unit is mounted, said truck assembly being movable with respect to a supporting frame (3), actuation means (5) for moving said truck assembly, said switching unit being reversibly movable between an insertion position (A), at which said switching unit is electrically connected to an electric line, and a withdrawal position (B), at which said switching unit is electrically disconnected from said electric line and an electro-mechanical signalling arrangement (6) that is mounted on said truck assembly, said electromechanical signalling arrangement interacting with said actuation means to provide electric signals indicative of the position of the switching unit at said insertion position (A), at said withdrawal position (B) or at an intermediate position (C) that is different from said insertion position and said withdrawal position.

The electro-mechanical signalling arrangement comprises an auxiliary contact device (7) of the rotational type and a first and second signalling mechanism (8, 9) to actuate said auxiliary contact device.

A high voltage contact control system includes main contacts on positive and negative feeder lines and a short circuit protection system configured between the positive feeder line and the negative feeder line. The short circuit protection system is configured to be operably connected between the positive and negative feeder lines and configured to selectively provide a bypass path between the positive feeder line and the negative feeder line to divert current away from the first and second contacts. The short circuit protection system includes first and second state arc prevention elements that can operate in at least two modes. The bypass path is established by having one of the arc prevention elements in a fully on mode and another either fully on or in a linear mode.

A high voltage contact control system includes main contacts on positive and negative feeder lines and a short circuit protection system configured between the positive feeder line and the negative feeder line. The short circuit protection system is configured to be operably connected between the positive and negative feeder lines and configured to selectively provide a bypass path between the positive feeder line and the negative feeder line to divert current away from the first and second contacts. The short circuit protection system includes first and second state arc prevention elements that can operate in at least two modes. The bypass path is established by having one of the arc prevention elements in a fully on mode and another either fully on or in a linear mode.

There is provided a plug-in bypass module (40) configured to be connected between connector terminals (20, 20) of a Cisco/Scientific Atlanta back box (10), the module (40) comprising a housing (46) within which is located a power pass bar (42) and an actuation element (44), wherein the power pass bar (42) comprises a central portion (50) disposed within the housing and two end portions (52) disposed external to the housing, the power pass bar (42) moveable in response to the actuation element (44) to create an air gap between each end portion (52) and support blocks (22, 22) on which connector terminals in a Cisco/Scientific Atlanta back box (10) are mounted. Each end portion (52) is angled relative to the central portion (50).

The present disclosure discloses a high-voltage DC relay comprising a cover, a main contact leading-out terminal, a coil bobbin, an auxiliary contact leading-out terminal and a coil leading-out terminal, wherein the cover and the coil bobbin are arranged up and down; two main contact leading-out terminals and two auxiliary contact leading-out terminals are respectively fixed on a top wall of the cover and their bottom ends respectively extend into a cavity of the cover; a winding shaft of the coil bobbin is vertically arranged; the coil leading-out terminal is mounted in a flange of the coil bobbin; the high-voltage DC relay also comprises a first connecting assembly and a second connecting assembly, wherein the first connecting assembly is composed of a first plastic element and a first conductive element, the second connecting assembly is composed of a second plastic element and a second conductive element.

An electronic electrical device comprising a first electrical conductor for the input of electric current, a second electrical conductor for the output of electric current, first and second electrical control devices, and first and second actuation systems. The first electrical control device and the second electrical control device are each adapted to have two respective positions to electrically connect and disconnect the first electrical conductor and the second electrical conductor to and from each other. The first actuation system comprising a digital electronic controller and the second actuation system comprising only mechanical components, or electromechanical components, or mechanical and electromechanical components. The first actuation system is adapted to vary the position of said first electrical control device independently of said second actuation system. The second actuation means is adapted to vary the position of said second electrical control device independently of said first actuation system.

The invention relates to a switch having a switch housing, a number of module-type individual interrupter chambers which can be arranged in particular side by side in the switch housing and having at least two switching contact elements, and an actuating device which closes off the switch housing above the individual interrupter chambers. This actuating device serves to adjust a cam element for the selective establishment of an electrical connection between the switching contact elements of an individual interrupter chamber. The switching contact elements can be arranged in at least two different orientations in each individual interrupter chamber in an explosion-protected manner. Furthermore, in particular the cam element of the actuating device can be arranged differently depending on the orientation of the switching contact elements. This results in a switch with a simple adaptation option for housing installation or front-panel mounting, wherein all requirements for explosion protection are also fulfilled at the same time.

A high-voltage DC relay convenient for quick assembly includes a housing, and load leading-out terminals, coil leading-out terminals and auxiliary leading-out terminals being provided with a connecting part for electrical connection with an external component. The connecting parts are respectively exposed to the housing; the connecting part of the load leading-out terminal is arranged at a top end of the housing; and the connecting parts of the coil leading-out terminal and the auxiliary leading-out terminal is arranged at a bottom end of the housing. Each connecting part has a welding plane for electrical connection with a corresponding one of the external components through quick welding. The present disclosure can realize the rapid welding assembly of products, maximize production efficiency of assembly and welding, and has characteristics of simple structure, low manufacturing cost and reliable electrical connection.