Abstract: A cable reel is provided, in particular for a pipe inspection system, the cable reel having a frame and a cable receptacle. The cable receptacle is rotatably arranged on the frame, it being possible to wind a cable onto the cable receptacle and unwind it from the cable receptacle. The cable receptacle has an inner cage and an outer cage, with the diameter of the inner cage being smaller than the diameter of the outer cage. The inner cage is arranged coaxially with respect to the outer cage and is inside the outer cage. It is possible to rotate the inner cage and the outer cage independently of one another, and the inner cage is receives a first cable portion of the cable and the outer cage receives a second cable portion of the cable.

Abstract: An inspection or maintenance system is provided comprising an electrical interface, wherein the inspection or maintenance system comprises an inspection or maintenance unit and an external unit, which can be coupled to the inspection or maintenance unit electrically. The inspection or maintenance unit comprises a housing and the housing has a first electrically conducting portion and at least a second electrically conducting portion. The electrically conducting portions are electrically isolated from each other, the external unit comprises a first electrical contact and at least a second electrical contact, wherein the electrically conducting portions and the electrical contacts are configured such that the first electrical contact can be brought into electrical contact with the first electrically conducting portion and the at least one second electrical contact can be brought into electrical contact with the at least one second electrically conducting portion.

Abstract: A cable reel is provided, in particular for a pipe inspection system, the cable reel having a frame and a cable receptacle. The cable receptacle is rotatably arranged on the frame, it being possible to wind a cable onto the cable receptacle and unwind it from the cable receptacle. The cable receptacle has an inner cage and an outer cage, with the diameter of the inner cage being smaller than the diameter of the outer cage. The inner cage is arranged coaxially with respect to the outer cage and is inside the outer cage. It is possible to rotate the inner cage and the outer cage independently of one another, and the inner cage is receives a first cable portion of the cable and the outer cage receives a second cable portion of the cable.

Abstract: An inspection or maintenance system is provided comprising an electrical interface, wherein the inspection or maintenance system comprises an inspection or maintenance unit and an external unit, which can be coupled to the inspection or maintenance unit electrically. The inspection or maintenance unit comprises a housing and the housing has a first electrically conducting portion and at least a second electrically conducting portion. The electrically conducting portions are electrically isolated from each other, the external unit comprises a first electrical contact and at least a second electrical contact, wherein the electrically conducting portions and the electrical contacts are configured such that the first electrical contact can be brought into electrical contact with the first electrically conducting portion and the at least one second electrical contact can be brought into electrical contact with the at least one second electrically conducting portion.