Protective assembly based on electrical resistance fuse with melting element

Abstract

The purpose of the invention is to improve the efficiency of heat dissipation from the interior of either a single or two separate or mechanically connected fuses (3, 3') of a housing (1) of a protective assembly (100) adapted to receive one or two separate or mechanically connected fuses, while simultaneously preventing the negative effects of the heat generated inside the housing (1) on the material of the housing (1), namely with the aim of maintaining the long-term and effective insulation ability of the housing (1). For this purpose, the housing (1) is equipped on its side walls (12, 13) with a discontinuous section (19', 19") and with rows of equally spaced cooling slots (12', 12'', 12'''; 13', 13'', 13'''), so that the rows on one and the other side walls (12, 13) along the housing (1) are spaced apart by a predetermined distance (S).On the other hand, the side walls (24, 25) of the cover (2) rotatably connected to the housing (1) are formed by evenly spaced support strips (24', 24'', 24'''; 25', 25'', 25'''), whereby the strips (24', 24'', 24'''; 25', 25'', 25''') in one and the other wall (24, 25) in the longitudinal direction of the housing (1) are also offset from each other, so that when the cover (2) is closed, they are located in the areas between the cooling slots (12', 12'', 12'''; 13', 13'', 13''') of the side walls (12, 13) of the housing (1).