A plug-in contact assembly suitable for automatic transfer switches includes a contact holder, two moving contact pieces disposed apart from each other, a moving contact piece bracket and a biasing spring; the contact holder holds the moving contact piece bracket and the biasing spring therein; and the two moving contact pieces disposed apart from each other are held in place relative to the contact holder under the joint action of the biasing spring and the moving contact piece bracket; characterized in that, two ends of each moving contact piece are each provided with a moving contact thereon by means of welding.

A switch, a power conversion apparatus, and a power supply system. The power supply system includes a control unit, a switch, a direct current source, and a power conversion unit. The switch is electrically connected between the direct current source and the power conversion unit, and the control unit is configured to send a switch-off signal to the switch when a fault occurs on the direct current source or the power conversion unit. The switch includes a contact component, a trip-free structure, and a knob that are sequentially disposed in a stacked manner in a first direction. A trip unit of the trip-free structure is configured to receive the switch-off signal, to unlock the trip unit from the cradle. The cradle drives the connecting rod structure to move, to separate the moving contact from the fixed contact.

A disconnector for use in a switchgear structured to electrically connect between a power source and a load includes a pair of disconnector blades spaced apart by a distance and having a first end structured to selectively receive and form an electrical connection with a busbar contact and a second end structured to electrically couple to the load, and a pair of magnetic plates mechanically connected to inner surfaces of the pair of disconnector blades and structured to bias the pair of disconnector blades toward each other.

A connection unit for connecting at least one connection element includes: a housing; a first contact element; a second contact element arranged on an opposite side to the first contact element, at least one receiving space being formed between the first contact element and the second contact element for clamping the at least one connection element between the first contact element and the second contact element; and at least one finger guard element which covers at least some regions of the first contact element and the second contact element in a region of the at least one receiving space. The first contact element, the second contact element, and the finger guard element are borne in the housing in a floating manner.

An electrical switch including a frame, a first stationary contact, a second stationary contact, a roll element and a movable contact mounted to the roll element. The roll element is rotatable around a rotation axis between a first position and a second position relative to the frame. The movable contact includes a first contact portion and a second contact portion. In the first position of the roll element, the movable contact electrically conductively connects the first stationary contact to the second stationary contact, and in the second position of the roll element the first stationary contact is electrically disconnected from the second stationary contact. The first in contact portion and the second contact portion are located on opposite sides of a centre plane perpendicular to the rotation axis.

An electric contact pair includes a first electric contact, and a second electric contact to be brought into electrical contact with the first electric contact. The first electric contact includes a first plating film made of Ag or a Ag alloy on its outermost surface, and the second electric contact includes a second plating film made of Rh or a Rh alloy on its outermost surface. The first plating film maybe layered on a first conductive base material, the second plating film maybe layered on a second conductive base material, and the first conductive base material and the second conductive base material are made of copper or a copper alloy, or aluminum or an aluminum alloy. A connector terminal pair includes a first terminal including the first electric contact, and a second terminal including the second electric contact.

A switch includes a switch body, for containing switch components, at least two terminal contacts, protruding from the switch body, at least one movable contact, which is movable from an operative position, wherein the movable contact is electrically coupled between the at least two terminal contacts, and a disconnecting position, wherein the movable contact is electrically uncoupled between the at least two terminal contacts. The switch also includes a moving mechanism including an electric motor and a support sliding element for the movable contact, driven by the moving mechanism and the electric motor, to move the movable contact between the operative condition and the disconnecting position.

A switch includes connection elements, connectable via a switching contact whose movable contact area is formed on a movable contact element which bears against the stationary contact area in the closed position. In order to achieve a design with improved positional accuracy, an embodiment of the invention proposes that the two connection elements and the movable contact element each have a planar flat side and all flat sides lie in a common plane. In an embodiment, the connection elements are arranged on one side of the common plane and the movable contact element is arranged on the other side; a subarea of the flat side of one connection element forms the stationary contact area; a subarea of the flat side of the other connection element forms a planar bearing area; and the movable contact element with its flat side bears movably against the bearing area.

A switch includes connection elements, connectable via a switching contact whose movable contact area is formed on a movable contact element which bears against the stationary contact area in the closed position. In order to achieve a design with improved positional accuracy, an embodiment of the invention proposes that the two connection elements and the movable contact element each have a planar flat side and all flat sides lie in a common plane. In an embodiment, the connection elements are arranged on one side of the common plane and the movable contact element is arranged on the other side; a subarea of the flat side of one connection element forms the stationary contact area; a subarea of the flat side of the other connection element forms a planar bearing area; and the movable contact element with its flat side bears movably against the bearing area.

Contact unit for a tap changer including a contact ring having a central axis, a plurality of fixed contacts arranged at a distance from the contact ring in different radial directions, and a moving contact arranged rotatable about the central axis of the contact ring and adapted to electrically connect the fixed contacts one at a time with the contact ring. The moving contact includes two elongated contact elements. Each of the contact elements includes a first contact area for providing electrical contact with the fixed contacts and a second contact area for providing electrical contact with the contact ring. The moving contact is designed so an electric path is formed between the first and second contact area. The first and second contact areas are positioned on opposite sides of a plane orthogonal to a longitudinal axis of the moving contact and including the central axis of the contact ring.