CIRCUIT BREAKER WITH COIL FOR ARC DISPLACEMENT

摘要

A circuit breaker has first and second relatively moveable primary contacts, each including a respective contact surface, adapted to move between a closed configuration in which the contact surfaces are in physical contact with one another and an open configuration in which the contact surfaces are separated by a contact gap. The first primary contact is connected to a first current terminal via a first current path and the second primary contact is connected to a second current terminal via a second current path. The second current path includes one or more coils disposed adjacent to the primary contacts so as to generate a magnetic field transverse to the contact gap, used to help extinguish any arc crossing the contact gap. The second current path may include a pair of relatively moveable secondary contacts configured to short the coil or coils during periods of normal current flow through the circuit breaker.