PHASE CONVERSION . 233
capacity of P kw. Thus the total machine capacity required for
both kinds of load would again be P0 + 2 P kw. three-phase
rating.
Thus, as regards machine capacity, there is no material differ-
ence between single-phase generation, and three-phase genera-
tion with phase conversion^ and the decision which arrangement is
preferable will largely depend on questions of construction and
operation. A more complete discussion on single-phase genera-
tion and phase conversion is given in A. I, E, E, Transactions,
November, 1916.