Abb Oy

Lumene Oy

Vesa Virtanen

Esa Virtanen

Tapani Tiitola

Jarkko RÄTY

Mari Jaakkola

Tiina Isohanni

Marianne MÄKI

Josefin Backman

Hanna-Liisa Malinen

The invention relates to a circuit breaker, which is in a fault situation arranged to disconnect an electrical apparatus, such as a distribution transformer, from an average voltage network or a high voltage network at each terminal. At least one link-spring mechanism is arranged at a shaft of the circuit breaker for holding contacts live in connected position and for pushing them apart to the extreme disconnected position when disconnected, while the shaft is brought over the dead spot of its turning. For an initial release, the shaft is at each phase provided with a lever arm, each lever arm at each phase being arranged to turn by a trip pin of a striker of a high voltage fuse the shaft of the circuit breaker and thus the moving contacts of all phases from said connected position over the dead spot of turning said shaft.

Circuit breaker for disconnecting an electrical apparatus from electrical network

Growing community of inventors

Vaasa, Finland

Vesa Virtanen