Switch with quenching chamber

摘要

A switch for multi-pole direct current service independent of polarity includes a plurality of switching chambers. Each chamber includes a double interrupter having two separate fixed contacts with a first contact area, a movable contact piece with two second contact areas, each for creating a connection between the contact areas in an ON state and for separating the contact areas in an OFF state, and at least two quenching devices for quenching arcs occurring when the OFF state is brought about. The switch also includes magnets for exerting a magnetic field in an area of the contact areas to exert a magnetic force on the arcs and drive the arcs, independent of their current direction, in the direction of one of the erasing devices. The contact pieces are disposed with the second contact areas essentially in a line perpendicular to a direction of motion of the arcs.

主权项

1. A switch suited for multi-pole direct current service, the switch comprising:
a plurality of switching chambers, each of the switching chambers including a double breaker having two separate fixed contacts, each with a first contact area, a movable electrically conductive contact piece with two secondary contact areas, each for creating an electrically conductive connection between the first and second contact areas in an ON state of the switch and for separating the first and second contact areas in an OFF state of the switch, and at least two quenching devices for quenching arcs that can occur between the first and second contact areas when the OFF state is brought about; at least two magnets configured to generate a magnetic field at least in a region of the first and second contact areas of the switching chambers so as to exert a magnetic force on the arcs so that at least one of the arcs is driven in a direction of one of the quenching devices independently of the current direction in the arc, wherein the contact pieces of the switching chambers are placed such that the second contact areas are essentially in a line perpendicular to a direction of motion of the arcs, wherein at least two of the switching chambers are disposed in a plane and two additional quenching devices extend toward the other of the first and second contact areas, at least one of the additional quenching devices being configured as a second quenching chamber, and second arc deflector plates extending from the second quenching chamber toward the first and second contact areas.