Abb Schweiz Ag

Abb Technology Ltd

Abb Power Grids Switzerland Ag

Mattias Lundborg

Stephan Grob

Per Skarby

Martin Seeger

Martin Kriegel

Xiangyang Ye

Andreas Dahlquist

Anders Holmberg

Andreas Nohl

Bengt Asplund

Jonas Persson

Anna Brorsson

An insulator for separating two objects with different electrical potential, the insulator including an insulating body enclosing a first volume for housing a gas, the body being provided with an opening, and a sealing arrangement arranged to seal the opening in the body and including a first gas-tight sealing element for sealing the opening and provided with a first closable opening, and a second gas-tight sealing element for sealing the opening, and arranged inside the first sealing element so that the first and second sealing elements define a second volume significantly smaller than the first volume. The second sealing element is provided with a second closable opening which in cooperation with the first closable opening enable control of the gas pressure in the first volume. Methods for leakage detection of the insulator are also disclosed.

Method of testing the integrity of a second seal of an electrical insulator

The hybrid circuit breaker has at least two series-connected arcing chambers, which are operated by a commmon drive via a transmission ( ) connected upstream from it. It is intended to be possible to assemble this transmission ( ) easily in the interior of the hybrid circuit breaker. This is achieved in that the transmission ( ) is formed from at least two transmission parts which can be plugged together, with a first transmission part being firmly connected to the at least one first arcing chamber and a second transmission part being firmly connected to the at least one second arcing chamber. The transmission ( ) also has means which allow the movements of the at least two arcing chambers to be technically suitably matched to one another and to be optimized with respect to the time sequence and switching speed thereof.

Hybrid circuit breaker with a transmission

Growing community of inventors

Ludvika, Sweden

Mattias Lundborg