The invention relates to a device for supporting and clamping two bus bar plates (2) onto each other, which device comprises: supporting elements (3) for supporting the bus bar plates; spring elements (5, 6, 7, 8) arranged opposite of the support elements (3); and an annular body (4) arranged around the support elements (3) and the spring elements (5, 6, 7, 8), wherein the annular body (4) comprises cams (13) for urging the spring elements (5, 6, 7, 8) towards the support elements (3) thereby pressing the two bus bar plates together.