Basic circuitry for electrically powered pipe-line pump stations under automatic or remote control

摘要

THROUGHOUT the last decade there has been an increasing trend to the employment of automatic sequence control systems in electrically powered pump stations on crude oil and products pipe lines. Not only has sequence control actuated by push buttons been widely employed for attended stations but also the use of sequence techniques has been greatly extended by the automatic operation of booster stations and by the remote operation of stations under supervisory control.1