A system for automatically establishing a temporary electrical power connection between a first and a second electrical power distribution (12, 14), said system comprising: a first coupling member with a first electrical coupling means electrically connected to said first electrical power distribution; a second coupling member with a second electrical coupling means electrically connected to said second electrical power distribution; said first coupling member includes a sealing ring surrounding said first electrical coupling means; said second coupling member includes a sealing ring contact surface surrounding said second electrical coupling means; said sealing ring and said a sealing ring contact surface are configured for being pressed together, whereby a vacuum chamber arranged between the first coupling member and the second coupling member is hermetically sealed off with regard to the atmosphere; and wherein by generating a vacuum in said vacuum chamber, said first coupling member and said second coupling member are firmly coupled together in a mechanical coupling position in which said first electrical coupling means and said second electrical coupling means achieve an electrical coupling position for transferring electrical energy between said first and said second electrical power distribution (12, 14); characterized in that at least one vacuum conduit is connected to said vacuum chamber for establishing in said vacuum chamber a vacuum capable of firmly holding together said first coupling member and said second coupling member, thereby defining said mechanical coupling position; said first or second electrical coupling means (18, 22) include a surface electrode (18 i) dimensioned for achieving a plurality of possible electrical coupling positions in a zone around the centre of the surface electrode (18 i); and said sealing ring and sealing ring contact surface are configured for achieving a sealed contact and thereby a mechanical coupling position in each of these possible electrical coupling positions. a first coupling member with a first electrical coupling means electrically connected to said first electrical power distribution; a second coupling member with a second electrical coupling means electrically connected to said second electrical power distribution; said first coupling member includes a sealing ring surrounding said first electrical coupling means; said second coupling member includes a sealing ring contact surface surrounding said second electrical coupling means; said sealing ring and said a sealing ring contact surface are configured for being pressed together, whereby a vacuum chamber arranged between the first coupling member and the second coupling member is hermetically sealed off with regard to the atmosphere; and wherein by generating a vacuum in said vacuum chamber, said first coupling member and said second coupling member are firmly coupled together in a mechanical coupling position in which said first electrical coupling means and said second electrical coupling means achieve an electrical coupling position for transferring electrical energy between said first and said second electrical power distribution (12, 14); characterized in that at least one vacuum conduit is connected to said vacuum chamber for establishing in said vacuum chamber a vacuum capable of firmly holding together said first coupling member and said second coupling member, thereby defining said mechanical coupling position; said first or second electrical coupling means (18, 22) include a surface electrode (18 i) dimensioned for achieving a plurality of possible electrical coupling positions in a zone around the centre of the surface electrode (18 i); and said sealing ring and sealing ring contact surface are configured for achieving a sealed contact and thereby a mechanical coupling position in each of these possible electrical coupling positions.