Abstract :
Electrically-driven mine-drainage pumps may be of the centrifugal or of the positive displacement reciprocating type. Since the characteristics of the driven pump have a considerable bearing on the choice of the most suitable driving motor, the first portion of the paper deals with operating and design characteristics of the two types of pump. The remainder of the paper shows how, by a study of these operating characteristics, the most suitable type of driving motor may be chosen.
