Abstract: A contact line system is provided for traction supply of an electrical tractive vehicle. It contains a contact line being contacted by a current consumer of the tractive vehicle for energy transmission. It further contains a central substation for converting a supply voltage into a contact line voltage which is electrically connected to the contact line via a section exit for supplying of energy. It additionally contains a protection device for interrupting the energy supply upon recognizing a failure which has a central measurement device for measuring a parameter in the section exit and an evaluation device for recognizing a failure. The protection device has decentrally arranged measurement units for detecting parameters outside of the substation and a data transmission system for transmitting parameter measurement values to the evaluation device. The evaluation device evaluates the decentrally detected parameter measurement values for failure recognition.

Abstract: A device for recognizing a mechanical defect in a wire of an overhead line. A device for determining the tension in the wire is connected to the wire and a support. The device is connected to an analytical device for comparing the tension with a set value and for indicating a mechanical defect when the value drops below the set value.

Abstract: One embodiment of the present invention discloses a coating for overhead trolley wire insulators, particularly in the area of rail electrification and energy transmission, which can be produced easily and inexpensively. For this purpose, particles and micro powders, hydrophobic particles in particular, are incorporated into the protective laquer.

Abstract: A device for recognizing a mechanical defect in a wire of an overhead line. A device for determining the tension in the wire is connected to the wire and a support. The device is connected to an analytical device for comparing the tension with a set value and for indicating a mechanical defect when the value drops below the set value.