A three-position disconnector switch includes: an earthing contact; a power out contact; a power in contact; a first piston; and a second piston. In a connected switch position the first piston makes an electrical connection with the power out contact and the second piston makes an electrical connection with the power out contact and the power in contact. In a disconnected switch position the first piston makes an electrical connection with the power out contact and the second piston makes an electrical connection with the power out contact. In an earthed switch position the first piston makes an electrical connection with the earthing contact and with the power out contact and the second piston makes an electrical connection with the power out contact.

The invention relates to a device for connecting and disconnecting an electrical load circuit, operated at high voltage by a voltage source, in a transportation means that is electrically driven by a drive operated at low voltage. According to the invention, a contact stud (6) is connected to the push rod (11) of a linear drive (2) and the contact stud (6) can be moved into at least two positions in a switch housing (4), wherein the switch housing (4) has, on its internal wall, at least two contact rings (5), one of which is connected to the voltage source (7) and the other is connected to the consumer circuit (8).

An apparatus for use in a power delivery system, the apparatus comprising: a DC circuit breaker having first and second terminals and configured to automatically switch from a closed state to an open state during an overcurrent condition; a disconnector switch in series with the DC circuit breaker, the disconnector switch having a first terminal for connecting to a first polarity terminal of a DC power supply, a second terminal for connecting to a second polarity terminal of the DC power supply and a common terminal connected to the first terminal of the DC circuit breaker, the disconnector switch having at least a first position in which the first terminal is connected to the common terminal and a second position in which the second terminal is connected to the common terminal; and an interlock mechanism coupled to the DC circuit breaker and the disconnector switch, the interlock mechanism configured to disable the DC circuit breaker from automatically switching from the closed state to the open state during the overcurrent condition when the disconnector switch is in the second position.

A light switch adapter with slight modification to an existing wall light switch turns the existing wall light switch into a smart device by replacing the existing screws with elongated screws. To further secure the adaptation, each of the elongated screw may contain an adapter screw head or fastener or knobbed protrusion that firmly couples the light switch adapter through an opening of the rear side of the light switch adapter. In another embodiment, the opening contains or shaped as a circlip or a C-clip that allows the adapter screw head snap into the opening securely.

A switch structure used for switching on or off an electronic system is provided. The switch structure includes a base, a switch body pivoted to the base, a first electrode connected and moved along with the switch body, a second electrode disposed on the based and corresponds to the first electrode, a torsion assembly, and a power source. The first electrode and the second electrode are electrically connected to the electronic system, respectively. The torsion assembly is connected to and drives the switch body, so as to drive the first electrode and the second electrode to switch between a conductive state and a non-conductive state. The power source is connected to the torsion assembly, and the power source provides a torsion to the switch body via the torsion assembly in an automatic state so as to switch the switch structure between the conductive state and the non-conductive state.

A remote controlled miniature circuit breaker includes a helical gear that engages with mating teeth of a slider plate coupled to main contacts of the circuit breaker, the helical gear including a flat portion to allow the sliding plate to slide past the helical gear. A unidirectional motor responds to an external signal to drive the helical gear while engaging the mating teeth of the slider plate, thereby moving the slider plate to close the main contacts. The motor is configured to respond to an external signal to resume the unidirectional rotation of the helical gear to position the flat portion of the gear to allow the slider plate to slide past the helical gear and contact a kicker lever to thereby open the main contacts. A trip lever pivotally mounted separately from the kicker lever, pushes the kicker lever to open the main contacts in a trip operation.

A switch structure used for switching on or off an electronic system is provided. The switch structure includes a base, a switch body pivoted to the base, a first electrode connected and moved along with the switch body, a second electrode disposed on the based and corresponds to the first electrode, a torsion assembly, and a power source. The first electrode and the second electrode are electrically connected to the electronic system, respectively. The torsion assembly is connected to and drives the switch body, so as to drive the first electrode and the second electrode to switch between a conductive state and a non-conductive state. The power source is connected to the torsion assembly, and the power source provides a torsion to the switch body via the torsion assembly in an automatic state so as to switch the switch structure between the conductive state and the non-conductive state.

A three-position disconnector switch includes an earthing contact, a power out contact, a power in contact, a piston, and a threaded rod. A length of the piston is such that in a first switch position an outer surface of a wall of the piston makes an electrical contact between the power out contact and the power in contact. The length of the piston is such that in a second switch position the outer surface of the wall of the piston does not make an electrical contact with either the earthing contact or the power in contact. The length of the piston is such that in a third switch position the outer surface of wall of the piston makes an electrical contact between the earthing contact and the power out contact. The piston includes an inner threaded section configured to engage with the threaded rod.

The invention discloses a smart switch panel and a smart remote control switch system. The smart switch panel includes a housing, an actuating device arranged in the housing and a microprocessor arranged in the housing to control the actuating device, and the actuating device includes a rotating rod and a driving member, the rotating rod cooperates with the driving member and pushes the driving member to move in a direction parallel to the rotating rod when the rotating rod rotates, so as to drive the switch to switch when the smart switch panel is mounted on the switch.

A switchgear which includes at least one three-position disconnector arranged in a gas-tight space of a frame. Each phase of the disconnector includes first, second, and third fixed contacts and a moving contact. The first fixed contact is directly connected to a main busbar, so that the conductive main circuit has shorter wiring, saving floor space, and conductor materials. An outer surface of the moving contact is provided with a slot extending in an axial direction to accommodate rolling elements, which guide the moving contact to move through the second fixed contact and prevent it from rotating. The moving contact is provided with grooves, which accommodate contact pieces to realize connection with the corresponding fixed contact. The moving contact of each disconnector is coupled to the same drive shaft so that it is connected to an external operating mechanism via only one sealing point on the frame.