Arc-suppressing apparatus for plastic-shell breaker

The utility model relates to the arc-suppressing apparatus of a low-voltage breaker. In order to improve the arc-suppressing performance of the arc-extinguishing apparatus, a fire damper is additionally installed on the top of the internal grating sheets of an air-suppressing chamber which a breaker originally has. The fire damper is made of magnetic material thin plate blocks. A plurality of thin plates are punched. The diameters of holes and the distance of the holes are made in a certain dimension. Plate blocks are folded in a certain interval. The structure and installation of a plate type can be in a long direction, or a transverse direction or an interlaced direction due to the breeds and the sizes of breakers and various types of arc-suppressing chambers. The arc-suppressing apparatus is additionally provided with the fire damper, which quickens the suppressing of electric arc and prevents the electric arc from reburning.