Sag tension/temperature test
Sag is the vertical distance between the anchor point and lowest point of the conductor. This test is usually carried out on overhead conductors, as excessive sagging can have severe consequences on overhead systems, including violation of electrical clearance distances, line breakage, tower or pole damage or even collapse. This test will determine the sag of the conductor at a given span at various temperatures. It will confirm if preliminary sag calculations are correct and provide proof of reliability of a given conductor. A similar set-up can be used to simulate ice-loading.
This test can be carried out on stranded conductor and overhead catenary systems. Lamifil’s internal method is based on the CIGRE 426 § 4.12 standard.