This test is designed to verify the long-term creep of a conductor or wire when holding a fixed tension. Creep results in further sagging after installation. For overhead lines, excessive sagging may result in power outages due to violation of electrical clearance distances, line breakage, tower or pole damage or even collapse. It is therefore critical to correctly estimate the creep that will occur over time. In the case of a railway contact wire sagging may lead to a bad contact between the pantograph and the contact wire. It is therefore critical to correctly estimate the creep that will occur over time.
Creep tests can be performed on stranded conductors, messenger wires and contact wires. Our lab is accredited for the common standard IEC61395.