Ground fault current protective device

A ground fault current protective device comprising a molded case ground fault trip unit (12) having a first (36) and a second (38) face, a molded case breaking unit (10,42) capable of being coupled to the trip unit and having breaking contacts (22) and a first and a second face, said breaking unit (10,42) having, aligned on said first face, external terminals (14) and on said second face internal connection terminals (18) in which said breaking contacts (22) of the breaking unit are inserted, said ground fault trip unit (12) comprising a differential transformer (24) having primary windings constituted by several active conductors (26,32) passing through the transformer and controlling the opening of the breaking contacts when a ground fault occurs, wherein the ground fault trip unit (12) comprises four active conductors (26,32) each having a first end and a second end, the first end of three active conductors (26) being connected to three aligned external terminals (28) of the ground fault trip unit (12), the second end of said three active conductors (26) being aligned on said first face (36) of the ground fault trip unit (12) to enable connection to be made to said internal terminals (18) of the breaking unit (10,42) and the first and second ends of the fourth conductor (32) being connected to terminals (34) located on said second face (38) of the ground fault trip unit (12).