ES440317A1 - Electric circuit-breaker board safety device for the connection and the disconnection of electric circuit-breakers - Google Patents

Abstract

Improvements in protective devices of electrical panels, for the connection and disconnection of switches operated by mobile trucks to insert them into their corresponding compartments or remove them, whose protective device is made up of a pair of security doors or shutters, that is, a door main (4) and an auxiliary or secondary door (6) housed in the compartment of the electrical panel (14) and establishing a diaphragm that separates the front and the back of the compartment, both doors being movable with horizontal translation with respect to the rear vertical wall (14') of the frame (14), the first or main door (4) being provided with openings or through holes (19) intended for the connection terminals (23) with their voltage and respective insulating bushings (11), while the second or auxiliary door (6) is suitable for closing said holes (19) of said main door (4), whose improvements are characterized by providing, at least, a measurement transformer (21 or 22) of the toroidal winding type, to measure the current intensity of the main circuit, installed on said main door (4) in correspondence with one of said holes (19), more specifically on the side of said door (4) facing the front of the compartment or panel (14), said part being, when the switch (1) is removed, protected against the primary voltage existing at the rear of said compartment (14), allowing said placement of the current transformer (21 or 22) -thanks to the horizontal translation movement that said main door (4) receives -: a) the magnetic connection of said measurement transformer (21 or 22) with the line terminals (23), when the switch (1) is inserted in the box compartment (14) and is connected to the main circuit (terminals 23); b) the accessibility to said current transformer (21 or 22) -when the switch (1) is removed from the compartment (14) - still leaving the terminals (23) of the main circuit in tension. (Machine-translation by Google Translate, not legally binding)