Contact line system of a railway line , having at least one contact line for supplying power to at least one vehicle, having at least one structure, having at least one covered region in which an electrical clearance, dependent on a maximum expected overvoltage, from the at least one structure, through which the contact line and the railway line pass, is to be observed, and having at least two discharging devices that are connected on the one hand to the at least one contact line of the contact line system and on the other to ground potential, characterised in that the at least two discharging devices are arranged in relation to the at least one covered region of the at least one structure such that a protected section of the at least one contact line , which is formed by the at least two discharging devices , covers the covered region , wherein the at least two discharging devices the maximum expected overvoltage in the at least one covered region of the at least one structure and the electrical clearance, dependent on the maximum expected overvoltage and to be observed from the at least one structure reduces in the protected section to an electrical clearance below the electrical clearance to be observed from the at least one structure without the at least two discharging devices , wherein one of the at least two discharging devices is arranged upstream and downstream of the at least one covered region in each case, and wherein the at least one contact line of the contact line system is formed in the region between the discharging devices so that the impedance level is essentially constant. having at least one contact line for supplying power to at least one vehicle, having at least one structure, having at least one covered region in which an electrical clearance, dependent on a maximum expected overvoltage, from the at least one structure, through which the contact line and the railway line pass, is to be observed, and having at least two discharging devices that are connected on the one hand to the at least one contact line of the contact line system and on the other to ground potential, characterised in that the at least two discharging devices are arranged in relation to the at least one covered region of the at least one structure such that a protected section of the at least one contact line , which is formed by the at least two discharging devices , covers the covered region , wherein the at least two discharging devices the maximum expected overvoltage in the at least one covered region of the at least one structure and the electrical clearance, dependent on the maximum expected overvoltage and to be observed from the at least one structure reduces in the protected section to an electrical clearance below the electrical clearance to be observed from the at least one structure without the at least two discharging devices , wherein one of the at least two discharging devices is arranged upstream and downstream of the at least one covered region in each case, and wherein the at least one contact line of the contact line system is formed in the region between the discharging devices so that the impedance level is essentially constant. <EOS>