Abb Technology Ag

Asea Brown Boveri Ab

Abb Technology Ltd

Ulf Akesson

Dag Andersson

Leif Skold

Yngve Petersson

A circuit breaker is disclosed. The circuit breaker includes a first current path section and a second current path section. At least one of the first and second current path section includes a first current path section member and at least one second current path section member. The at least one second current path section member is arranged in spaced relation to a surface of the first current path section member. The at least one second current path section member is electrically coupled with the first current path section member via at least a first coupling surface portion of the surface of the first current path section member.

Dual current path for high rated currents

A circuit breaker for high voltage applications, including: at least one breaking unit, a supporting insulator having one end on ground potential and the other end on high voltage potential, and the end on high voltage potential is mechanically connected to the breaking unit, and a fiber optic sensor for sensing the current through the breaking unit. The supporting insulator is removably connected to the breaking unit. The sensor has an optic fiber coil arranged in the high voltage end of the supporting insulator, and the circuit breaker includes a mechanism for conducting current from the breaking unit to the sensor so that the current passes through the sensor coil.

Circuit breaker

In connection with synchronous closing or opening of three-pole circuit breakers, the desired time shift between the instants of contact make or contact break in the different phases can be achieved mechanically by a suitable choise of arms and links in the mechanical system interconnecting the contacts and the operating device. The necessary time difference between the instants of switching, with retained positions of open and closed contacts, can be achieved in mechanism with a toggle joint (4, 51) which is extended to a greater or smaller extent in the three poles.

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Ludvika, Sweden

Ulf Akesson