A make contact system for high-voltage applications includes a vacuum switching tube having two switch contacts in the form of plate contacts, of which at least one is a moving contact coupled to a drive. At least one plate contact is rotationally symmetrically surrounded by a shielding element, and the shielding element has an electric conductivity which is less than 40×10.sup.−6 S/m.

A network service and transformer safety protector on a secondary side of a network transformer tank system. The network service and transformer safety protector is positioned between the network transformer and a secondary network distribution system and is configured to connect and disconnect a transformer from the secondary network. The network service and transformer safety protector is attached to the outside of the transformer tank.

A make contact system for high-voltage applications includes a vacuum switching tube having two switch contacts in the form of plate contacts, of which at least one is a moving contact coupled to a drive. At least one plate contact is rotationally symmetrically surrounded by a shielding element, and the shielding element has an electric conductivity which is less than 40×10.sup.−6 S/m.

Various embodiments include an insulator arrangement for a high-voltage or medium-voltage assembly comprising an axially symmetrical insulating structure element having two annular base regions separated from one another by an annular blocking region. The relative permittivity of the material of the blocking region is at least twice as high as the relative permittivity of the material of the base region.

A ceramic insulator for vacuum interrupters extends along a longitudinal extent and forms a cavity in said longitudinal extent. The cavity has a first opening on a first end of the longitudinal extent and a second opening on a second end of the longitudinal extent. The openings are designed so that they can be sealed in a gas-tight manner using appropriate connections. The sealed first opening is designed to guide at least one fixed contact into the cavity, and the sealed second opening is designed to guide at least one moving contact into the cavity. The ceramic insulator has, on an inner face of the cavity, one or multiple electrically conductive discharge path interrupters extending perpendicularly to the longitudinal extent of the ceramic insulator.

A network service and transformer safety protector on a secondary side of a network transformer tank system. The network service and transformer safety protector is positioned between the network transformer and a secondary network distribution system and is configured to connect and disconnect a transformer from the secondary network. The network service and transformer safety protector is attached to the outside of the transformer tank.

Various embodiments include an insulator arrangement for a high-voltage or medium-voltage assembly comprising an axially symmetrical insulating structure element having two annular base regions separated from one another by an annular blocking region. The relative permittivity of the material of the blocking region is at least twice as high as the relative permittivity of the material of the base region.

A ceramic insulator for vacuum interrupters extends along a longitudinal extent and forms a cavity in said longitudinal extent. The cavity has a first opening on a first end of the longitudinal extent and a second opening on a second end of the longitudinal extent. The openings are designed so that they can be sealed in a gas-tight manner using appropriate connections. The sealed first opening is designed to guide at least one fixed contact into the cavity, and the sealed second opening is designed to guide at least one moving contact into the cavity. The ceramic insulator has, on an inner face of the cavity, one or multiple electrically conductive discharge path interrupters extending perpendicularly to the longitudinal extent of the ceramic insulator.

The present disclosure relates to a vacuum interrupter that is installed within a vacuum circuit breaker to break a circuit. The vacuum interrupter includes an insulated container, a seal cup, a fixing electrode, a diaphragm, and a movable electrode. The insulated container is formed in a cylindrical form. The seal cup is installed on an upper end of the insulated container. The fixing electrode includes a fixing shaft and a fixing contact member installed on the other end of the fixing shaft. The diaphragm is installed on a lower end of the insulated container. The movable electrode includes a movable shaft having one end fixed to the diaphragm and the other end disposed within the insulated container and formed to be linearly movable, and a movable contact member installed on the other end of the movable shaft to be selectively contacted to the fixing contact member.

The present disclosure relates to a vacuum interrupter that is installed within a vacuum circuit breaker to break a circuit. The vacuum interrupter includes an insulated container, a seal cup, a fixing electrode, a diaphragm, and a movable electrode. The insulated container is formed in a cylindrical form. The seal cup is installed on an upper end of the insulated container. The fixing electrode includes a fixing shaft and a fixing contact member installed on the other end of the fixing shaft. The diaphragm is installed on a lower end of the insulated container. The movable electrode includes a movable shaft having one end fixed to the diaphragm and the other end disposed within the insulated container and formed to be linearly movable, and a movable contact member installed on the other end of the movable shaft to be selectively contacted to the fixing contact member.