Method for determination of economic optimization of power cable size

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

28-06-1991

Publisher

British Standards Institution

Committees responsible
National foreword
Method
Introduction
1. Scope
2. Normative references
3. Symbols
4. Calculation of total costs
5. Determination of economic conductor sizes
Annexes
A. Examples of calculation of economic conductor sizes
B. Mean conductor temperature and resistance
Tables
A.1 Cable details
A.2 Economic loading
A.3 Current-carrying capacity criterion
A.4 Economic loading, standard conductor size for all
sections
Figures
A.1 System layout
A.2 Economic current ranges
A.3 Variation of cost with conductor size

For economic choice of conductor size based on joule losses. Voltage dependent losses are not considered.

This International Standard deals solely with the economic choice of conductor size based on joule losses. Voltage dependent losses have not been considered.

NOTE 1 It is recommended that the method given in this standard should not be used for cables operating on system voltages equal to or greater than the following (see IEC 287):

Type of cable	System voltage U_o kV
Cables insulated with impregnated paper:
solid type	38
oil-filled and gas pressure	63,5
Cables with other types of insulation:
butyl rubber	18
EPR	63,5
PVC	6
PE (HD and LD)	127
XLPE (unfilled)	127
XLPE (filled)	63,5

NOTE 2 Modifications to the method given in this standard in order to take dielectric losses into account are under consideration.

Likewise, matters such as maintenance, energy losses in forced cooling systems and time of day energy costs have not been included in this standard.

An example of the application of the method to a hypothetical supply system is given in Annex A.

Committee	GEL/20/16
DevelopmentNote	Also numbered as IEC 61059 Supersedes 89/31146 DC (10/2005)
DocumentType	Standard
Pages	26
PublisherName	British Standards Institution
Status	Current

IEC 60853-2:1989	Calculation of the cyclic and emergency current rating of cables. Part 2: Cyclic rating of cables greater than 18/30 (36) kV and emergency ratings for cables of all voltages
IEC 60853-3:2002	Calculation of the cyclic and emergency current rating of cables - Part 3: Cyclic rating factor for cables of all voltages, with partial drying of the soil

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BS 7450:1991

Method for determination of economic optimization of power cable size

Table of Contents

Abstract

Scope

General Product Information

Standards Referencing This Book

Category

Subcategory