How can line tension be related to equivalent conductor temperature?
This is an artistic process, which requires several different simultaneous processes to reduce errors to a minimum. For the CAT-1 monitoring system, these processes are: Measure tension and solar temperature with the line out of service for an extended period of time (at least 24 hours) during the coolest and hottest times of the year. Measure tension and solar temperature with the line in service over an extended period of time (at least one month preferably at the coolest and hottest times of the year). Calculate sag-tension-temperature values using a program like SAG10 for the calculated ruling span -or- Use a program like SAG-SEC to estimate the temperature-tension-sag relationships, which account for suspension point movement.
