Abstract :
An analytical method of calculating the optimum economic design of a continuously tapered, branched radial, l.v. distributor, under balanced-loading conditions, is presented, assuming that the voltage drop is the limiting factor. The principles used in the continuously tapered distributor are then applied to the design of distributors from standard cable sizes. A computer program is described which designs the most economical system, subject to voltage-drop criteria, using these principles. The program also takes into account cable thermal ratings, capitalisation of losses and the factors for diversity and unbalanced loading used by British Area Boards. Facilities are included in this program to take account of pieces of existing cable and, where it is required, to use a section of the cable as an interconnector.
