DEVICE AND METHOD FOR DETERMINING THE MECHANICAL STRESS OF A CONTACT WIRE OF AN OVERHEAD LINE

The invention relates to a device (1) for determining an actual tension (TR) of a contact wire (C) of a catenary extending above a railway track, the device comprising: - means for suspending (4) the device (1) on the contact wire (C); - an organ for applying (5) a bending force capable of causing the contact wire (C) located between two stops (40) to take an angle, the organ for applying (5) a bending force comprising an electric motor (51); - a force sensor (60); - measurement means; - an electronic system (7) capable of determining a calculated stiffness (RC), and the actual mechanical tension of the contact wire (C).