738-2012 - IEEE Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors

Standard Details

A method of calculating the current-temperature relationship of bare overhead lines, given the weather conditions, is presented. Along with a mathematical method, sources of the values to be used in the calculation are indicated. This standard does not undertake to list actual temperature-ampacity relationships for a large number of conductors nor does it recommend appropriately conservative weather conditions for the rating of overhead power lines. It does, however, provide a standard method for doing such calculations for both constant and variable conductor current and weather conditions.

Standards Committee	PE/T&D - Transmission and Distribution
Status	Active
Corrigendum	738-2012/Cor 1-2013
Board Approval	2012-10-19
History	Published Date:2013-12-23

Additional Resources Details

PAR	Approved PAR

Working Group Details

Working Group	738_WG - Conductor Working Group P738
Working Group Chair	Cody Davis
Standards Committee	PE/T&D - Transmission and Distribution
Society	IEEE Power and Energy Society
IEEE Program Manager	Michael Kipness
Active Projects	Active P738 - Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors The standard describes a numerical method by which the core and surface temperatures of a bare overhead conductor are related to the steady or time-varying electrical current and weather conditions. The method may also be used to determine the conductor current which corresponds to conductor temperature limits. The standard does not recommend suitable weather conditions or conductor parameters for use in line rating calculations.
Existing Standards	Superseded 738-1986 - IEEE Standard for Calculation of Bare Overhead Conductor Temperature and Ampacity Under Steady-State Conditions The purpose of this standard is to present a simplified method of calculating the current-temperature relationship of bare over-head lines when given the weather conditions.
	Active 738-2012/Cor 1-2013 - IEEE Approved Draft Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors - Corrigendum 1 Technical corrections are addressed in this corrigendum. (NOTE: This corrigendum was not published as an individual standard. It was incorporated into IEEE Std 738-2012 at the time of publication)