In one embodiment, a method of manufacturing a high voltage power fuse includes inserting a housing over a first assembly leg of an assembly frame, assembling a first terminal fabrication to the first assembly leg of the assembly frame, assembling a second terminal fabrication to a second assembly leg of the assembly frame, connecting a full-range fuse element assembly in a gap between the first terminal fabrication and the second terminal fabrication, sliding the housing over the connected full-range fuse element assembly, securing the housing in position to enclose the full-range fuse element assembly, and applying a silicated filler material to the assembled housing, full-range fuse element, and first and second terminals to establish a mechanical bond between the silicated filler material and the assembled housing, full-range fuse element, and first and second terminals.

A high-voltage earthing switch is disclosed. A static contact of the earthing switch is connected with the first end of a conductive copper busbar. The second end of the conductive copper busbar is connected with a transformer. The conductive copper busbar includes a first segment and a second segment connected with the first segment. The first segment is one straight segment and an end is taken as an end the first end of the conductive copper busbar. The first segment is parallel to the instantaneous action direction of the moving contact when a moving contact engages the static contact. The first segment extends from the static contact in the direction opposite to the instantaneous action direction of the moving contact when the moving contact engages the static contact. The second segment is connected with the other end of the first segment, and extends towards the side of the first segment facing away from the moving contact. The second segment is located at one side of an extended line of one end of the contacting finger connected with the moving contact when the earthing switch switching-on in the direction opposite to the instantaneous action direction at the moment when the moving contact engages the static contact. An electromotive force between the conductive copper busbar and the contacting finger of the earthing switch of the invention may have a positive effect on a switching-on.

A power distribution switchgear including a housing to which a switch is mounted, housing has an opening, the first and second electric contact connected to a first and second conductors. A rotating operating shaft of inserted into the opening, and an actuator having a first end coupled to the shaft and a second end coupled to the second contact. The actuator and shaft made of an electrically insulating material. The shaft supported in the housing by the actuator member. The interface is located at a distance D from the longitudinal axis Y of the shaft that is longer than a distance d between axis Y and a circumferential edge that delimits the opening.

The present invention discloses a horizontal-deflection prevention mechanism for an HVDC relay, comprising a moving contact assembly which comprises a moving reed and moving contacts arranged at left and right ends of the moving reed; an upper section of a pushrod is located above a yoke plate and fixed with the moving reed; a positioning plate is provided on the yoke plate; and a left return spring is connected between a left end of the moving reed and the positioning plate, and a right return spring is connected between a right end of the moving reed and the positioning plate. In the present invention, by the arrangement of a left return spring and a right return spring at the left and right ends of the moving reed at which moving contacts are provided, on one hand, a breaking force can be provided, which allows the moving contacts to quickly separate from the stationary contacts when the moving contacts and the stationary contacts are to be separated from each other, so that the relay makes a response quickly. On the other hand, the left return spring and the right return spring always provide an acting force which prevents the moving reed from rotating horizontally, so as to ensure that the moving contacts and the stationary contacts can come into contact precisely and to thus prevent the occurrence of faults due to the contact between the moving reed and other components.

The device is used for locking an access for actuating two switching devices of high-voltage switchgear with the aid of a drive shaft transmitting drive force onto the two switching devices. In order to increase the operational safety of the high-voltage switchgear with little outlay, the locking device comprises a closing disk which is fastened on the drive shaft, a rocker bar arrangement containing at least four rocker bars, and a slider. The slider can be moved, on-site, into two positions, the first of which releases an access for the actuation on-site and blocks an access for the actuation from a remote location, and the second of which blocks the access for the on-site actuation and releases the access for the remote actuation.

An object of the present disclosure is to provide a switchgear that reduces a cost of periodic replacement of a drive unit and ensures reliability. A switchgear of the present disclosure includes a fixed electrode, a movable electrode provided to face the fixed electrode, the movable electrode being contactable with and separable from the fixed electrode, a piston provided opposite to the fixed electrode to drive the movable electrode via a movable shaft connected to the movable electrode, a container to accommodate the piston, and an arc generation mechanism bridging including metal and provided in the container at a position opposite to the fixed electrode, the arc generation mechanism bridging a terminal unit connected to an external circuit, the arc generation mechanism bridging opening a circuit with the terminal unit when energized to generate an arc at an opened portion.

The present disclosure provides a conductive member for a circuit breaker high voltage portion conductor assembly, the conductive member including a body with a transfer portion and a coupling portion. The body transfer portion has an electro-thermally efficient contour. That is, the body transfer portion has an electrically efficient contour and a thermally efficient contour. The body transfer portion includes a number of slots defining fins. In this configuration, the body transfer portion distributes current generally evenly across a cross-sectional area of the conductive member body. Further, the fins provide heat dissipation via convection.

A switching device for an electrically driven vehicle, in particular a track vehicle, has a switch unit that is provided for respectively connecting and disconnecting a vehicle drive unit to and from an electrical supply line carrying high voltage and has at least two switch contacts. A drive unit is provided for driving a relative movement of the switch contacts with respect to one another. A housing unit receives the switch unit and the drive unit. The housing unit contains a support for supporting at least the switch unit. In order to provide a generic switch device for which a compact construction can be achieved, the switch unit is arranged in a lying position relative to the support.

Modular switchgear and methods for manufacturing the same. The modular switchgear includes a vacuum interrupter assembly, a source conductor assembly, and a housing assembly. The vacuum interrupter assembly includes a bushing, a fitting, and a vacuum interrupter at least partially molded within the bushing and including a movable contact and a stationary contact. The source conductor assembly includes a bushing, a fitting, and a source conductor molded within the bushing. The housing assembly includes a housing defining a chamber and a drive shaft and conductor positioned within the chamber. The housing assembly also includes a first receptacle for receiving the fitting of the vacuum interrupter assembly and a second receptacle for receiving the fitting of the source conductor assembly. The vacuum interrupter assembly, the source conductor assembly, and the housing assembly are coupled without molding the assemblies within a common housing.

A switch includes a fixed contact part including a fixed contact, a movable contact part including a movable contact, a control button, an operation part including a first end and a second end, and a lock. When the first end is pressed, the control button is pressed by the operation part, the movable contact touches the fixed contact, and the switch becomes an ON state. While the movable contact and the fixed contact are in contact with each other, a first protrusion of the lock touches an engaging part of the control button to limit movement of the control button and maintain the ON state. When the second end is pressed, the operation part touches a second protrusion of the lock and moves the lock in such a direction that the first protrusion moves away from the engaging part, and the switch becomes the OFF state.