The capacitor — An aid to electric-power service for pipe lines

W. G. Taylor (nonmember; General Electric Company, Schenectady, N. Y.): In the portion of their paper concerning the War Emergency Pipelines, Inc. Hyde and Marbury show that, when the main pump motors are started on the 80 per cent tap of the autotransformer, the demand, with two units in operation and the third one being started, is about 25 per cent less than when starting at full voltage. This is evidently based on the assumption that full-rated voltage of 2,300 is maintained on the pumping station bus. In “Electrical Equipment for the War Emergency Pipe-Line Projects,” by Thomas, Taylor, and Wolfe,¹ it is stated that, under the most unfavorable power conditions, only about ten per cent reduction in starting kilovolt-amperes of the motor can be expected from reduced-voltage starting. With two motors already running, the reduction in station demand would be even less in percentage.