TAP-OFF FACILITIES FOR PREFABRICATED ELECTRIC BUS-BAR DUCTS

摘要

The invention relates to a tap-off facilities or shunt for prefabricated electric bus-bar ducts which comprises a box body having a frontal cover that is provided with access openings (18) designed for receiving the electric contacts of a unit or bulb socket (20) to be connect to the bus-bar conductor. The access openings (18) are associated with a same number of movable barriers (21), which are subject to movements in a perpendicular direction with respect to the frontal cover between a forward closed position and a retracted open one of said access openings. The movement of the movable barriers from the forward closed position to the retracted open position is caused by the insertion of the electric contacts of the socket unit or bulb in said access openings, whereas the movement of the movable barriers from said retracted open position to said forward closed position is triggered by return springs (23) associated with said barriers.