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BSI BS 7450:1991

Method for determination of economic optimization of power cable size
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BSI BS 7450:1991

Method for determination of economic optimization of power cable size

PUBLISH DATE 1991
BSI BS 7450:1991

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 Uo 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.

For economic choice of conductor size based on joule losses.

Voltage dependent losses are not considered.

SDO BSI: British Standards Institution
Document Number 7450
Publication Date June 28, 1991
Language en - English
Page Count
Revision Level
Supercedes
Committee GEL/20/16
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