A load-break switch for medium-voltage switching systems comprising: an inner elongated insulating housing enclosing: a vacuum interrupter comprising a vacuum chamber containing a fixed contact electrically interconnected with a second conductive bar and a movable contact electrically connected to a flexible conductor and a first switch contact; a second switch contact electrically connected with a first conductive bar; a pair of parallelly arranged spaced apart cam plates being rotatably connected to a drive shaft, wherein the drive shaft passes through a pass-through hole, wherein each of the cam plates includes the pass-through hole coaxially arranged around and mechanically coupled to the drive shaft; a pair of rotable blades being mechanically connected to one end of the pair of parallelly arranged spaced apart cam plates; wherein said pair of rotable blades is movable by means of the drive shaft between a main current path in electrical communication with the fixed contact and an isolation path when the movable contact is spaced apart from the fixed contact, said drive shaft, on one side, causes said pair of rotable blades to acquire said main current path and, on another side, to acquire the isolation path, one end of each of the rotable blades is in electrical contact with the first switch contact and an opposite end of each of the rotable blades is in electrical contact with the second switch contact, wherein the main current path is formed in a first position of the pair of rotatable blades and an isolation path is formed in a second position of the pair of rotatable blades, the pair of rotatable blades is embodied as rotatable by 90° around the drive shaft, characterized in that the first switch contact has a curved shape and is extending from a second opposite end of the flexible conductor alongside a part of the flexible conductor towards the pass-through hole, wherein a second opposite end of the first switch contact is semicircular and semi-circularly encircles the pass-through hole. a vacuum interrupter comprising a vacuum chamber containing a fixed contact electrically interconnected with a second conductive bar and a movable contact electrically connected to a flexible conductor and a first switch contact; a second switch contact electrically connected with a first conductive bar; a pair of parallelly arranged spaced apart cam plates being rotatably connected to a drive shaft, wherein the drive shaft passes through a pass-through hole, wherein each of the cam plates includes the pass-through hole coaxially arranged around and mechanically coupled to the drive shaft; a pair of rotable blades being mechanically connected to one end of the pair of parallelly arranged spaced apart cam plates; wherein said pair of rotable blades is movable by means of the drive shaft between a main current path in electrical communication with the fixed contact and an isolation path when the movable contact is spaced apart from the fixed contact, said drive shaft, on one side, causes said pair of rotable blades to acquire said main current path and, on another side, to acquire the isolation path, one end of each of the rotable blades is in electrical contact with the first switch contact and an opposite end of each of the rotable blades is in electrical contact with the second switch contact, wherein the main current path is formed in a first position of the pair of rotatable blades and an isolation path is formed in a second position of the pair of rotatable blades, the pair of rotatable blades is embodied as rotatable by 90° around the drive shaft, characterized in that the first switch contact has a curved shape and is extending from a second opposite end of the flexible conductor alongside a part of the flexible conductor towards the pass-through hole, wherein a second opposite end of the first switch contact is semicircular and semi-circularly encircles the pass-through hole.