1
David R Ellis Anwyl: Digital logic control system for three-phase submersible pump motor. Borg Warner Corporation May 3, 1977: US04021700 (68 worldwide citation)


Complete protection of a three-phase submersible pump motor, such as the type used downhole in an oil well, is obtained with a solid state digital logic control system that monitors each of the three phase currents and shuts the pump motor down if any of those phase currents indicates either an unde ...


2
Joseph E Vandevier, David R Ellis Anwyl: Overload protection system for three-phase submersible pump motor. Borg Warner Corporation December 28, 1976: US04000446 (36 worldwide citation)


Overload protection of a three-phase submersible pump motor, such as the type used downhole in an oil well, is obtained with a solid state digital logic control system that monitors each of the three phase currents and shuts the pump motor down if any of those phase currents indicates an overload co ...


3
Joseph E Vandevier, David R Ellis Anwyl: Phase sequence detector for three-phase AC power system. Borg Warner Corporation August 24, 1976: US03976919 (22 worldwide citation)


The phase sequence of the phase currents supplied by a three-phase AC power supply to a phase-sensitive load (such as a three-phase AC motor) is monitored by developing three phase-displaced, rectangular shaped logic signals, respectively representing the three phase currents, and applying these log ...



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