Popis: |
other factors affecting the selection of pumping equipment and the power to drive it. A major portion of this discussion refers to possible outages and their consequences. Before proceeding, it is essential to state that the more pessimistic remarks concern possible emergencies, and there is no intention, or reason, to cast doubt on the reliability of electric-power service to water utility pumping stations. The relative economy, simplicity, and reliability of electric power under most conditions are recognized and generally accepted. Electric-power service has become so dependable, in fact, that undue risks of interrupted water service are probably taken in many instances because of continued reliance |