Modular switchgear systems are provided including at least two separate modules including components of switchgear. The at least two separate modules are independent of one another. One of the at least two separate modules is a stationary module and remaining ones of the at least two separate modules are removable such that the remaining ones of the at least two separate modules are configured to engage and/or disengage easily from the stationary module and an electrical power system. Related removable modules are also provided.

A switchgear includes: a tank having a first through hole; a fixed contact in the tank; a movable contact capable of reciprocating between a position in contact with the fixed contact and a position separated from the fixed contact; and an operating rod capable of reciprocating in a direction parallel to the direction of movement of the movable contact, and penetrating through the first through hole. The switchgear further includes: a connecting plate connecting the movable contact and the operating rod; a shielding plate disposed closer to the fixed contact than the connecting plate, having a second through hole through which the operating rod penetrates and a third through hole through which the movable contact is capable of passing formed therein; a first bearing disposed in the first through hole to support the operating rod; and a second bearing disposed in the second through hole to support the operating rod.

Provided is a gas-insulated switchgear that facilitates additional installation work and achieves reduction in working time in the case of increasing arranged boards in additional installation of open/close devices. A bus tank storing a bus is provided above a circuit breaker tank storing a circuit breaker, the bus is connected to a bus connection bushing provided at a width-direction end of the bus tank, a tank width dimension of the bus tank is smaller than an enclosure width dimension of the gas-insulated switchgear, and a space formed by a difference between the enclosure width dimension and the tank width dimension serves as a connection space for the bus when the gas-insulated switchgear is arranged in a row.

The present invention relates to a bus conductor connection structure for electric field relaxation. The bus conductor connection structure for electric field relaxation includes: an enclosure filled with an inert gas; spacers coupled to two side end portions of the enclosure in a facing contact manner and having connection conductors; conductors provided with predetermined intervals being maintained inside the enclosure; and coupling portions formed in end portions of the conductors, wherein the coupling portion is coupled to the connection conductor in a close contact manner with bolts. Accordingly, the bus conductor connection structure for electric field relaxation is allowed to simply fixing conductors and assembling bolts of a gas insulated bus and to reduce a size of the bus by shortening an insulation distance between the bus and the ground by using a shape and arrangement for electric field relaxation.

A switchgear according to the present invention includes a disconnecting unit that includes multiple switches to switch electrical paths by rotation of blades, and a switch housing having a view port, and including the switches arranged therein, wherein planes of rotation of the blades and an arrangement direction of the switches intersect, and the switches are arranged rearward from the view port.

A bushing for switchgear is composed of an outer metal ring, a current-conducting element and a disk-shaped ceramic insulating element which can be mounted in a floating manner in the outer metal ring. There is also described a switchgear with such a bushing.

A cable adapter that is operable to electrically couple an existing switchgear cable used for old switchgear to a connection location on new switchgear. The adapter includes an elbow portion that is configured to be electrically coupled to a connector for the switchgear cable and an extension portion that is electrically coupled to the elbow portion. The adapter also includes a cylindrical connection portion electrically coupled to the extension portion and being configured to be electrically coupled to the new switchgear at the proper location. In one embodiment, the elbow portion, the extension portion and the connection portion combine as a single piece member including an internal conductor, a dielectric insulation rubber layer covering the internal conductor and an outer semi-conductive rubber layer covering the insulation layer, where the rubber layers are molded over the conductor.

A gas-insulated line is provided. The gas-insulated line defines an axial direction and includes an enclosure configured to surround a nominal conductor and a pressurized insulation gas in the enclosure, wherein the enclosure includes: a first attachment point and a second attachment point, the first attachment point and the second attachment point being spaced apart from each other in the axial direction; a rope element fixed between the first attachment point and the second attachment point and loaded with a pretension; and a flexible enclosure element arranged between the first attachment point and the second attachment point.

An outer end cap for sealing a connection end of an electrical connector includes a cover section covering an end face of the connection end and a collar section attached to the connection end. The cover section has a through-hole receiving a sensor cable of a sensor. The cover section and the collar section jointly form a receptacle receiving the connection end. An interior surface of the receptacle has a semi-conductive material. A connector seal is formed on the interior surface of the receptacle and a cable seal is formed in the through-hole.

A Branch busbar device for high voltage arrangements, whereby the branch busbar device comprises a first electric line with a first electric contact area and a second electric line with a second electric contact area, whereby the first electric contact area is connected to the second electric contact area, whereby a first field limiting part is arranged at a first place adjacent to the contact areas, a second field limiting part is arranged at a second place adjacent to the contact areas, and the first field limiting part and the second field limiting part are electrically connected to the first electric line or to the second electric line or to a third electric line of the branch busbar device is provided.