A differential protection module with a multipole switch block with a safety coupling for coupling to the multipole switch block

摘要

In a differential protection module with safety coupling for coupling to a multipole switch block, the face of the differential module which is placed beside the multipole switch block has register pins which jointly perform the function of a key for the exclusive coupling of a differential module and a switch block which have predetermined electrical characteristics and the same number of poles; a protective cover articulated to the differential module in a captive manner has means for irreversible coupling with the switch block, the means preventing access to clamping screws of connecting terminals, the protective cover also having irreversible coupling means which engage irreversibly in a socket of the switch block for a slide for coupling with a rail, the socket being without a slide. IMAGE