Contact wire system for traction supply of an electric tractive vehicle

A contact line system for traction supply of an electric tractive vehicle, the contact line system comprising:

• a contact line contactable by a current collector of the tractive vehicle for power transmission;
• a track feeder;
• a central substation for converting a supply voltage into a contact line voltage, said central substation being electrically connected to said contact line via said track feeder to supply power;
• and
• a protection device for disconnecting the power if a fault is detected, said protection device having a central measuring device for measuring a characteristic variable in said track feeder and an evaluation device for detecting the fault by evaluating a characteristic variable measurement, said protection device having decentrally disposed measuring units for acquiring characteristic variables outside of said central substation and a data transmission system for transmitting decentrally acquired characteristic variable measurements from said decentrally disposed measuring units to said evaluation device, wherein said evaluation device configured to evaluate also the decentrally acquired characteristic variable measurements for fault detection, wherein at least one of said decentrally disposed measuring units configured to measure the characteristic variable describing a state of the current collector.