A high-frequency relay with excellent shielding performance includes a magnetic circuit part, a base part, and movable contact part. The base part includes an upper and a lower ground shield pieces, at least two static contact pieces, and a plastic body combining the lower grounding shield piece and the static contact pieces into an integrated structure through an injection molding; each of the static contact pieces has a contact for contacting with the movable contact part, a top surface of the contact is higher than an upper surface of the lower grounding shield piece; the upper grounding shield piece is mounted on the plastic body and is higher than the top surface of the contact and is grounded through the lower grounding shield piece; a shielding space that is grounded above and below at the portion for transmitting signals inside the relay.

The electromagnetic relay includes a contact unit, an electromagnet, an armature unit, and a base. The contact unit includes a fixed contact and a movable spring including a movable contact. The armature unit is movable in accordance with excitation of the electromagnet to allow the movable contact to move between a closed position in contact with the fixed contact and an open position away from the fixed contact. The base holds the contact unit and the electromagnet on a certain surface side. The movable contact is placed between the base and the fixed contact in an arrangement direction in which the base and the electromagnet are arranged. The armature unit includes a press part which causes movement of the movable contact by applying a pressing force to a certain surface facing the fixed contact, of the movable spring.

Disclosed in the present invention are a magnetic circuit part having an enhanced initial electromagnetic attraction force, and a high-voltage direct-current relay. The magnetic circuit part comprises a coil, a movable magnetic conductor and a static magnetic conductor, wherein the coil, the movable magnetic conductor and the static magnetic conductor are respectively mounted at suitable positions, such that a magnetic pole surface of the movable magnetic conductor and a magnetic pole surface of the static magnetic conductor are in opposite positions with a preset magnetic gap; and one of the two magnetic pole surfaces is provided with a protrusion that protrudes toward the other magnetic pole surface, and the other magnetic pole surface is provided, at a position corresponding to the protrusion, with a recess in which the protrusion of one of the magnetic pole surfaces can be embedded when the movable magnetic conductor and the static magnetic conductor attract each other. According to the present invention, the initial electromagnetic attraction force can be enhanced under the same volume and power consumption of the coil; or under the same initial electromagnetic attraction force, the volume of the coil is reduced, and the power consumption of the coil is decreased.

A polar relay is provided including: an insulation housing, an armature assembly, and a coil assembly. The armature assembly is pivotably mounted within the insulation housing. The armature assembly is rotatable between a first position and a second position, with one end of the iron core in contact with one armature of the pair of armatures while the other end of the iron core is spaced apart from and thus out of contact with the pair of armatures by corresponding gaps therebetween. The gaps are provided without providing a magnetic isolation plate between or applying an isolation layer onto contact layers of the armature and the iron core. The armature assembly is rotatable around a vertical pivot axis, avoiding changing a position of the pivot point during the movement of the iron core, stabilizing the action of the armature assembly, and ensuring the continuity of the action of the product.

In a particular embodiment, a method of assembling an electromechanical switching device is disclosed that includes partially inserting a lower static core into a core cavity of a coil assembly having a plurality of components including a plunger assembly enclosure and a coil enclosure. In this embodiment, the core cavity is formed by the plunger assembly enclosure and the coil enclosure. The method also includes positioning the coil assembly within a coil yoke and pushing the coil assembly into the coil yoke such that the lower static core is fully inserted in the core cavity.

Fault breaking contactors are disclosed. In an embodiment, an electromechanical switching device includes one or more terminals; a moveable contact; and an actuator assembly for moving the moveable contact between a closed position in which the moveable contact contacts the one or more terminals and an open position in which an air gap is maintained between the moveable contact and the one or more terminals; and a dynamic air gap mechanism configured to increase the air gap beyond that of the closed position in response to a fault current.

An electromagnetic driving unit includes a bobbin having an inner hole; a coil wound on the bobbin; a movable attraction member disposed in the inner hole; and a static attraction member disposed at an end of the inner hole and opposite to the movable attraction member. A plane perpendicular to an axial direction of the inner hole is a projection plane; an orthographic projection area of the movable attraction member on the projection plane is a first projection area; an orthographic projection area of the static attraction member on the projection plane is a second projection area; and the second projection area is larger than the first projection area.

A relay includes a contact container having a contact chamber; a pair of static lead-out terminals fixedly disposed relative to the contact container; a first magnetizer movably disposed within the contact chamber, and having a first and a second positions; a movable member including a movable contact piece and a second magnetizer, the first and second magnetizers are disposed at an opposite sides of the movable contact piece; the first distance between the first magnetizer and the second magnetizer in the first position is greater than the second distance between the first magnetizer and the second magnetizer in the second position; and a tripping assembly. Wherein the first magnetizer is connected to the contact container through the tripping assembly, and the tripping assembly is configured to release the first magnetizer when a magnetic attraction force between the first magnetizer and the second magnetizer exceeds a threshold.