Patent ID: 6188559
Filing Date: 2001-02-13
Classification: H01T

Abstract:
A line-protection device with integrated cutoff, the device comprising:a three-pole lightning arrester provided with two line electrodes and one ground electrode;conductor means which define two line input terminals, two line output terminals, and a ground terminal, and which provide respective links between interconnection terminals of the line electrodes of the lightning arrester and respective ones of the input terminals, between an interconnection terminal of the ground electrode of the lightning arrester and the ground terminal, and between the line input terminals and the line output terminals;switch means having conductive blades in which each blade connects one of the input terminals to a respective one of the output terminals when it is in a first position, and is resiliently returned against a grounding piece connected to the ground terminal when it is in a second position, whereupon it interrupts the link hitherto established between an input terminal and an output terminal; andtrigger means comprising a trigger fuse piece which is thermally connected to the lightning arrester and which maintains the blades in their first position until a heating limit temperature is reached above which the piece is transformed and enables the blades to be resiliently returned to their second position;wherein the trigger means are constituted by a trigger piece which is made up of a recessed central body bearing against the lightning arrester, and of blade-retaining members positioned on either side of the central body so as to secure the blades to the trigger piece.