Apparatus for electrically connecting a first laminated multi-phase busbar to a second laminated multi-phase busbar, wherein each of said first and second laminated multi-phase busbars (2a, 2b) includes a plurality of conducting layers and insulating layers which are arranged between said conducting layers and wherein said conducting layers of said first laminated multi-phase busbar project from said insulating layers thereof, forming a first lateral connecting portion with first contact surfaces (6a1 to 6a 4), and said conducting layers of said second laminated multi-phase busbar project from said insulating layers thereof, forming a second lateral connecting portion with second contact surfaces (6b1 to 6b4), the apparatus comprising a bridging element which includes a plurality of laminated insulating layers and conducting layers having contact surfaces which are adapted to contact associated contact surfaces (6a1 - 6a4; 6b1 - 6b4) of said first and second lateral connecting portions (4a, 4b) of said first and second busbar (2a, 2b), wherein the first and second laminated multi-phase busbar (2a,2b) and the bridging element have mating steplike end sections, and wherein the apparatus comprises a first clamping arrangement (100a; 200a; 300a) comprising clamping plates (102a1, 102a2; 202a1, 202a2; 302a1, 302a2) which are adapted to mechanically contact and urge associated opposing first outer clamping sections (10a1, 10a2) of said first busbar and said bridging element towards each other, and a second clamping arrangement (100b; 200b; 300b) comprising clamping plates (102b1, 102b2; 202b1, 202b2; 302b1, 302b2) which are adapted to mechanically contact and urge associated opposing second outer sections (10b1, 10b2) of said second busbar and said bridging element towards each other, characterized in that each of said first and second clamping arrangement (100a,100b) comprises a pressure transfer element (104a, 104b) having a first end portion (106a, 106b) to which a first clamping plate (102a1, 102b1) is pivotally connected, a second end portion (108a, 108b) to which a transversal tension bolt (110a, 110b) is pivotally connected and a third end portion (112a, 112b), to which an expansion bolt (114a, 114b) is pivotally connected, wherein said first and second pressure transfer elements (104a, 104b) are arranged on a first outer side of said bridging element at a distance to each other with the first end portions (106a, 106b) facing away from each other and the third expansion bolts (114a, 114b) being coupled and movable relative to each other by a turnbuckle nut, and wherein each of said transversal tension bolts (110a, 110b) extends through a transversal opening (118a, 118b) formed in said bridging element in a direction which is perpendicular to a longitudinal axis of the third expansion bolts (114a, 114b) and is connected to a common lateral pressure beam which extends across a second outer side of said bridging element, said common lateral pressure beam carrying a fixed clamping plate (102a2, 102b2) at each of its opposing end portions which is adapted to contact an associated clamping section (10a1, 10b1) of said first and second busbar (2a, 2b) which is arranged opposite to said clamping section (10a2, 10b2) of said bridging element. a second clamping arrangement (100b; 200b; 300b) comprising clamping plates (102b1, 102b2; 202b1, 202b2; 302b1, 302b2) which are adapted to mechanically contact and urge associated opposing second outer sections (10b1, 10b2) of said second busbar and said bridging element towards each other, characterized in that each of said first and second clamping arrangement (100a,100b) comprises a pressure transfer element (104a, 104b) having a first end portion (106a, 106b) to which a first clamping plate (102a1, 102b1) is pivotally connected, a second end portion (108a, 108b) to which a transversal tension bolt (110a, 110b) is pivotally connected and a third end portion (112a, 112b), to which an expansion bolt (114a, 114b) is pivotally connected, wherein said first and second pressure transfer elements (104a, 104b) are arranged on a first outer side of said bridging element at a distance to each other with the first end portions (106a, 106b) facing away from each other and the third expansion bolts (114a, 114b) being coupled and movable relative to each other by a turnbuckle nut, and wherein each of said transversal tension bolts (110a, 110b) extends through a transversal opening (118a, 118b) formed in said bridging element in a direction which is perpendicular to a longitudinal axis of the third expansion bolts (114a, 114b) and is connected to a common lateral pressure beam which extends across a second outer side of said bridging element, said common lateral pressure beam carrying a fixed clamping plate (102a2, 102b2) at each of its opposing end portions which is adapted to contact an associated clamping section (10a1, 10b1) of said first and second busbar (2a, 2b) which is arranged opposite to said clamping section (10a2, 10b2) of said bridging element.