Abb Schweiz Ag

Abb Research Ltd.

Peter Unternaehrer

Lukas Zehnder

Martin Lakner

Thomas Schoenemann

Jean-Claude Mauroux

Patrik Reto Kaufmann

Daniel Chartouni

Leopold Ritzer

Jochen Kiefer

Tilo Buehler

Marc Mollenkopf

Gabriel Schuler

Davis Just

A cooling apparatus is provided for a switchgear. The switchgear has one or more primary contacts constructed and arranged to connect to a terminal of a circuit breaker. The cooling apparatus includes an evaporator constructed and arranged to be associated with each primary contact. A condenser is located at a higher elevation than the evaporator. Fluid conduit structure fluidly connects the evaporator with the condenser. A portion of the fluid conduit structure defines a busbar tube electrically connected with an associated primary contact and defining a busbar of the switchgear. Working fluid is in the evaporator so as to be heated to a vapor state, with the fluid conduit structure being constructed and arranged to transfer the vapor to the condenser and to passively return condensed working fluid back to the evaporator for cooling the at least one primary contact and the associated busbar tube.

Cooling apparatus for switchgear with heat pipe structure having integrated busbar tube

An exemplary isolating tube, and production method thereof, includes a mechanically load-bearing plastic tube composed of a fiber-reinforced polymer for use in a cooling element which can be loaded with high voltage, during whose operation the isolating tube forms an electrical isolation gap and in the tube interior carries an agent which flows as a liquid and/or vapor. The isolating tube can have a diffusion barrier which is held coaxially by the plastic tube. Such an isolating tube can be produced using an exemplary novel method for production.

Isolating tube for a cooling element which can be loaded with high voltage

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Wurenlos, Switzerland

Peter Unternaehrer