الفهرس 
general literature reviewOnly 14 pages are availabe for public view
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Abstract
In a power cable, the maximum permitted insulating temperature is often a limitation to its current carrying 1ty ( ampacity ). The full utilieation of the cable mater1al is only possible if temperature can be calculated Several me thods have b e¬12rtroduced for solving the problem of thermal heat flow ?t.e1ed cable system49• Usually the interest is in ca1¬1;1Dg the temperature-rise of a cable system buried dire-otly in the soil.the surface temperature-rise are usually caloulated from formulae derived using the methed of images.Kennely40 using the method of images. Kennelj”approximate expression to oalculate the aoe temperature.rise for a three-phase single-core flat His approach has been developed
assumption that the spacing between conductors of burial are l.arge ompared with the diameter.’¥s are not general.l;y f’ullfilled by many actual :;Z;,.tiUOh asgafLinsulated ~ables19., ~t oarrying capacity of’ a cable system 1s limited by the permissible conductor temperaturet, or crucia-l1y influenced by the heat transferer’ to the environment ofthe cable 41.