Electromagnetically operable switch for DC-bus, has magnetic device provided for producing magnetic field, where magnetisation direction of field is inclined to switch releasing direction at angle less than specified degrees

摘要

The switch has an electric arc extinguishing device for extinguishing an arc developed between main contact units (3, 4). The device has an extinguishing contact unit that is arranged in an area of the unit (3) for coupling the arc to the device. A magnetic device (11) produces a magnetic field (M), where the magnetization direction of the field is inclined to a switch releasing direction (1.1) at an angle less than 45 degrees.