Abstract
Following a brief review of the standard formulae in connection with the forces on current-carrying conductors the author examines the problem from a more general standpoint, and derives formulae for both the distribution and direction of forces on conductors lying at any angle in different planes. It is felt that these formulae (eqns. 4 and 5), which have not previously been published, will be of value for the following reasons: (i) The approximations obtained by application of the standard formulae to non-standard conductor arrangements may lead to serious over- or under-estimation of the true magnitude of mechanical forces and their moments. (ii) A precise knowledge of the direction of the resultant mechanical force is of considerable importance in determining the cantilever stress in the very long insulator stacks used for h.v. installations. (iii) The general formulae put forward are comprehensive in that all the standard formulae for the distribution and direction of forces may be readily obtained by suitable substitution.
Published Version
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