Areva T & D Sas

Uwe Ernst

Saïd Kantas

Laëtita Dalmazio

Martin Schlaug

Xavier Godechot

Rama Shanker Parashar

Pierre Newinger

A vacuum circuit-breaker wherein at least in one of the contacts at least one stud is used as a spacer, and is disposed between the mechanical connection portion and the circular plate of the contact body in such a manner as to avoid the collapse thereof during a closing operation of the vacuum circuit-breaker, and in the closed position the contacts can withstand very high compression forces, typically greater than 700 kg-force or 2 t-force.

Contact for a medium-voltage vacuum circuit-breaker with reinforced structure, and an associated circuit-breaker or vacuum circuit-breaker, such as an AC generator disconnector circuit-breaker

A vacuum circuit-breaker wherein one contact body is made with two windings implanted concentric with one another and connected electrically in parallel. The second winding is in the form of an solid part with an annular ring. The circuit-breaker increases the axial magnetic field (AMF) and distributes it uniformly over the contact surface so that arc extinction is improved for high short-circuit currents, typically greater than 63 kA.

Contact for a medium-voltage vacuum circuit-breaker with improved arc extinction, and an associated circuit-breaker or vacuum circuit-breaker, such as an AC generator disconnector circuit-breaker

Growing community of inventors

Gauting, Germany

Uwe Ernst