Answer (from Ningbo Changshi): Sagging and tensioning are essential because they directly affect the safety and reliability of the transmission line. The correct sag ensures that the conductor has enough clearance from the ground and other objects, even under extreme conditions like high winds, ice, or high temperatures. It also ensures that the tension on the towers remains within safe design limits.

We measure sag and tension with high precision using several methods:

• Dynamometer: This is used to monitor and display the pulling tension in real-time, allowing operators to make instant adjustments.

• Transit/Theodolite: A surveying instrument is used to measure the conductor's lowest point (sag) in a span, comparing it against pre-calculated specifications.

• Sagging Boards: These are simple markers placed on towers to provide a visual reference for the correct sag.

Our team ensures all measurements are meticulously checked against the engineering specifications to guarantee a safe and durable installation.