line designers typically assume the conductor temperature is homogeneous
through the thickness of a conductor and use the surface temperature to
calculate the sag of a line. If the core temperature of the conductor is
significantly hotter than the surface temperature, then this assumption is
invalid and the lines will sag more than predicted. Thus, it is important and
useful to know if this core-to-surface exists and if it is large enough to
affect the sag calculations. In this
project, NEETRAC conducted experimental studies to evaluate the effects of a
wide number of factors (current, tension, conductor type, aluminum area,
percent steel and odd/even layers) on the core-to-surface temperature
differences of conductors. This research
was a follow-on to an earlier report on an initial small sample size and diversity
of constructions. Please Read Before Downloading NEETRAC Report
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By accessing (downloading/viewing) any NEETRAC report, the reader agrees to abide by the restrictions as to the use and sharing of information contained in said report. The reader acknowledges that the applicable restrictions are stipulated in the NEETRAC Bylaws along with the various Application Procedures as promulgated by the NEETRAC Management Board on a regular basis. These Bylaws and Applicable Procedures are posted on the member-restricted segment of the NEETRAC website. See neetrac.org and contact NEETRAC for more information.