ELECTRIC ARC EXTINCTION CHAMBER FOR AN ELECTRICAL PROTECTION DEVICE AND AN ELECTRICAL PROTECTION DEVICE COMPRISING AT LEAST ONE SUCH EXTINCTION CHAMBER

Electric arc extinction chamber for an electrical protection device and an electrical protection device comprising at least one such extinction chamber. The present invention relates to an electric arc extinction chamber comprising juxtaposed metal separation plates (1) spaced apart from each other and at least two flanges (2) arranged on either side of the plates so as to hold them in position. It further comprises at least one reinforcing part (3) arranged on the inner face (2a) of each flange (2) extending along the juxtaposed metal separation plates, each lateral side (1a) of the separation plates comprising at least one notch (10a) provided with at least one retaining element (100a) projecting out of the notch (10a), each reinforcing part being inserted into the notches and the retaining elements passing through the reinforcing part and the flange so as to reinforce the maintenance of the spacing between the plates. It also relates to an electrical protection device comprising at least one such extinction chamber.