Abb Management Ag

Asea Brown Boveri Ag

Abb Schweiz Ag

Ernst Berger

Franz Heil

Herbert Schifko

Piero Tecchio

This power circuit-breaker has at least one cylindrically constructed arcing chamber which is provided with a stationary contact, with a moving contact and with a quenching zone between the two contacts. A shaft of the moving contact is permanently connected to a blowout volume which is closed off on the stationary contact side by an insulating nozzle through which at least one flow channel passes. The arcing chamber has a first compression volume which is operatively connected to the blowout volume and to a second compression volume. It is intended to provide a power circuit-breaker in which the blowing-out of the arc with pure SF.sub.6 gas is made stronger. This is achieved by providing a moving auxiliary piston between the first compression volume and the second compression volume and by the auxiliary piston being connected to the moving contact via a direction-changing device.

Power circuit-breaker

A metal-encapsulated, gas-insulated switching installation is provided with at least one busbar system, the busbar system having an axis separation, and a circuit breaker, the circuit breaker being in the form of a pole and having a pole axis, the circuit breaker including at least one quenching chamber installed in a pole enclosure and at least one connection for the associated busbar system. The pole axis is arranged at a right angle to a surface of a foundation. The circuit breaker of the switching installation includes a modular circuit breaker pole. The modular circuit breaker pole includes an enclosure lower part having a first end and a second end, and at least one opening for connecting an isolator for a busbar system between the first end and the second end of the enclosure lower part, an enclosure upper part having a first end and a second end, at least one of the first end and the second end of the enclosure upper part being attachable to each of the first end and the second end of the enclosure lower part, and an enclosure cover attachable to at least one of the second end and the first end of the enclosure upper part. The enclosure lower part, the enclosure upper part, and the enclosure cover define at least part of a circuit breaker pole enclosure having a pole axis.

Metal-encapsulated, gas-insulated switching installation

A metal-enclosed, gas-filled switchgear unit has at least two busbar systems and a circuit breaker which respectively has per pole a pole axis and at least one arcing chamber built into a pole housing constructed as a metal enclosure. The pole axes are arranged perpendicular to a foundation and lie in a first plane. Furthermore, the switchgear unit respectively has an electrically conductive connection, extending along a connecting axis, between the live arcing chamber of the respective pole and each of the busbar systems. A metal-enclosed, gas-filled switchgear unit is provided in which the insulation and the fastening of the arcing chambers of the circuit breaker poles are substantially simplified and reduced in cost. The arcing chamber is connected in a force-closed fashion to the at least two current terminals and the arcing chamber is positioned by these alone in the metal enclosure.

Metal-enclosed gas-filled switchgear units

A metal-enclosed, gas-insulated switching installation includes at least two busbar systems and a circuit breaker. Each circuit breaker is in the form of a pole having a pole axis and at least one extinction chamber, installed in a pole housing. The pole axes are arranged perpendicularly to a foundation and are located in a first plane. The switching installation includes an electrically conductive connection, extending along a connecting axis, of the voltage-carrying extinction chamber of the circuit breaker to each of the busbar systems and an isolator arranged in the connection between the busbar and the circuit breaker pole.

Growing community of inventors

Mellingen, Switzerland

Ernst Berger