IEEE 738 1993

$61.75

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

Published By	Publication Date	Number of Pages
IEEE	1993	53

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Description

Revision Standard – Inactive – Superseded. Superseded by IEEE Std 738-1993 A simplified method of calculating the currenttemperature relationship of bare overhead lines, given the weather conditions, is presented.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 temperatureampacity relationships for a large number of conductors in a large number of conditions.

PDF Catalog

PDF Pages	PDF Title
1	Title Page
3	Introduction Participants
5	CONTENTS
7	1. Overview 1.1 Introduction
8	1.2 Definition of terms
9	2. Temperature calculation methods 2.1 Steady-state calculations
10	2.2 Transient calculations
11	2.3 Identification of letter symbols
12	2.4 Formulas
15	2.5 Equations for tables 1, 2, 3, and 4
19	2.6 Sample calculations
24	3. Input data 3.1 Introduction 3.2 Wind and ambient temperature
25	3.3 Air density, viscosity, and conductivity 3.4 Emissivity and absorptivity 3.5 Solar heat gain 3.6 Conductor heat capacity
26	3.7 Maximum allowable conductor temperature 3.8 Time step 4. Bibliography
29	Annex A—Listing of the “RATEIEEE” program for steady-state and transient calculations of temperature and thermal rating …
45	Annex B—Sample calculation of steady-state thermal rating
46	Annex C—Sample calculation of steady-state conductor temperature
47	Annex D—Sample calculation of transient conductor temperature for a step increase in current
51	Annex E—Sample calculation of transient thermal rating
52	Annex F—Thernal time constant